TRICKLE-L: 199706XX
is the compilation of discussion during Jun 97
via AB4EL Web Digests @ SunSITE
Date: Thu, 22 May 1997 00:02:32 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 20 May 1997 to 21 May 1997
There are 2 messages totalling 98 lines in this issue.
Topics of the day:
1. Trickle irrigation and jojoba
2. Returned mail: Host unknown (Name server: ucracl.ucr.edu: host not found)
----------------------------------------------------------------------
Date: Wed, 21 May 1997 10:57:59 -0400
From: Irrometer@AOL.COM
Subject: Re: Trickle irrigation and jojoba
In a message dated 97-05-20 19:26:22 EDT, you write:
)Subj: Trickle irrigation and jojoba
)Date: 97-05-20 19:26:22 EDT
)From: pathulme@OZEMAIL.COM.AU (Pat Hulme)
)Sender: TRICKLE-L@CRCVMS.UNL.EDU (Trickle-L Discussion List)
)Reply-to: TRICKLE-L@CRCVMS.UNL.EDU (Trickle-L Discussion List)
)To: TRICKLE-L@CRCVMS.UNL.EDU
)
)G'Day,
)I have recently been discussing irrigation options for a 20 ha jojoba
)plantation in eastern Australia.
)My understanding from research agronomists here is that the best irrigation
)strategy is to fill the soil with water when the plants are dormant
)(winter), then have plants use this moisture during the summer. The
)advice is that furrow irrigation is the best way of doing this.
)The question put to me was: Are there any successful jojoba plantations
)irrigated by trickle irrigation?
)Can participants of TRICKLE-L help me answer this question?
Try Steve Cockerham at U.C. Ag Operations at:
stephen@ucracl.ucr.edu I forwarded a copy of your
posting to him.
Regards, Bill Pogue, Irrometer Co. Inc.
------------------------------
Date: Wed, 21 May 1997 16:13:00 -0400
From: Irrometer@AOL.COM
Subject: Re: Returned mail: Host unknown (Name server: ucracl.ucr.edu: host not
found)
In a message dated 97-05-21 11:55:00 EDT, you write:
)Subj: Returned mail: Host unknown (Name server: ucracl.ucr.edu: host not
)found)
)Date: 97-05-21 11:55:00 EDT
)From: MAILER-DAEMON@aol.com (Mail Delivery Subsystem)
)To: Irrometer@aol.com
)
)The original message was received at Wed, 21 May 1997 10:57:59 -0400 (EDT)
)from root@localhost
)
) ----- The following addresses have delivery notifications -----
)stephen@ucracl.ucr.edu (unrecoverable error)
)
) ----- Transcript of session follows -----
)550 stephen@ucracl.ucr.edu... Host unknown (Name server: ucracl.ucr.edu:
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)not found)
)
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) by emout09.mail.aol.com (8.7.6/8.7.3/AOL-2.0.0)
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) Wed, 21 May 1997 10:57:59 -0400 (EDT)
)Date: Wed, 21 May 1997 10:57:59 -0400 (EDT)
)From: Irrometer@aol.com
)Message-ID: (970521105609_-1532354946@emout09.mail.aol.com)
)To: TRICKLE-L@crcvms.unl.edu
)cc: stephen@ucracl.ucr.edu
)Subject: Re: Trickle irrigation and jojoba
)
)In a message dated 97-05-20 19:26:22 EDT, you write:
)
))Subj: Trickle irrigation and jojoba
))Date: 97-05-20 19:26:22 EDT
))From: pathulme@OZEMAIL.COM.AU (Pat Hulme)
))Sender: TRICKLE-L@CRCVMS.UNL.EDU (Trickle-L Discussion List)
))Reply-to: TRICKLE-L@CRCVMS.UNL.EDU (Trickle-L Discussion List)
))To: TRICKLE-L@CRCVMS.UNL.EDU
))
))G'Day,
))I have recently been discussing irrigation options for a 20 ha jojoba
))plantation in eastern Australia.
))My understanding from research agronomists here is that the best irrigation
))strategy is to fill the soil with water when the plants are dormant
))(winter), then have plants use this moisture during the summer. The
))advice is that furrow irrigation is the best way of doing this.
))The question put to me was: Are there any successful jojoba plantations
))irrigated by trickle irrigation?
))Can participants of TRICKLE-L help me answer this question?
)
)Try Steve Cockerham at U.C. Ag Operations at:
)stephen@ucracl.ucr.edu I forwarded a copy of your
)posting to him.
)Regards, Bill Pogue, Irrometer Co. Inc
Sorry---Cockerham is : stephenc@ucrac1.ucr.edu
Regards, Bill Pogue
------------------------------
End of TRICKLE-L Digest - 20 May 1997 to 21 May 1997
****************************************************
Date: Sat, 24 May 1997 00:02:29 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 21 May 1997 to 23 May 1997
There are 2 messages totalling 58 lines in this issue.
Topics of the day:
1. hello
2. ceramics, anyone?
----------------------------------------------------------------------
Date: Fri, 23 May 1997 11:21:56 -0700
From: Peter Eminger (eminger@IFGB.UNI-HANNOVER.DE)
Subject: hello
)Who you are
researcher in the field of horticulture economics, currently working on
my PhD
)What part of the world you are from
Germany, but working about horticulture in the republic of yemen
)Why you are interested in trickle-l
the region under research is highly arid (approx. 50mm a year). so all
production depends on irrigation. in former times this was mostly
achieved through flood irrigation when the wadis brought runoff from the
mountains twice a year, but with modern well and pumping equipment
farmers now widely utilize groundwater at an unsustainable rate.
"modern" comveyance and application methods like drip or bubbler
irrigation are very rare and there is the fear that they might result in
salinity problems. Thats why I am here.
)Your specific questions or topics that you would like to see discussed
any ideas regarding irrigation under extremely arid conditions.
regards, peter
------------------------------
Date: Fri, 23 May 1997 15:07:28 -0700
From: Ken Shackel (kashackel@UCDAVIS.EDU)
Subject: ceramics, anyone?
Dear Tricklers,
Can anyone give me some advice/place to check/whatever, on making
porous ceramics? I need to make a rod (or tube) about 10" long, 1/2" or so
in OD, and would like the material to have an air entry value of about 10 or
15 bars. Soil Moisture corporation makes a cup of the right size, but only
out of 1 bar material, and, after a long wait, they have finally told me
they are unable (or unwilling, I wasn't sure which) to make it out of
smaller porosity material (I only need 2). Are there any commercial
suppliers of the raw ceramic materials (soil moisture also told me their
materials were proprietary when I suggested I could give it a try myself)?
Thanks.
Ken Shackel
Department of Pomology
University of California
Davis, CA 95616-8683
[note: new area code (530) as of November 1, 1997]
Phone (916) 752-0928
Fax (916) 752-8502
------------------------------
End of TRICKLE-L Digest - 21 May 1997 to 23 May 1997
****************************************************
Date: Sun, 25 May 1997 00:01:25 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 23 May 1997 to 24 May 1997
There are 2 messages totalling 97 lines in this issue.
Topics of the day:
1. Relayed message from IJ Editor
2. Weather and River Data CD
----------------------------------------------------------------------
Date: Sat, 24 May 1997 06:28:07 -0700
From: Richard Mead (rmead@AGRILINK-INT.COM)
Subject: Relayed message from IJ Editor
Irrigation Journal Editor Bret Scaliter has been having email problems and
wanted me to repost her latest Trickle-L contribution. It is possible that
this has already been posted and Bret could not view it (by the way this is
the default, if you post to Trickle-L, you will not see your own posting).
However, I am away from my home computer and have not had the time to
confirm the situation.
R. Mead
Trickle-L owner/manager
------------------------------------------
Trickle-L members:
I am once again soliciting articles for the July/August "Irrigation
Journal." Two topics that I am currently pursuing are:
1) Innovations in Drip Tape
2) Planning a Microsprinkler System
As the "Irrigation Journal's" readership is primarily composed of
growers/farmers, the slant on articles is agricultural. If you would
like to submit/write an article on either of these topics or have a
lead on someone knowledgeable about the topic, please contact me as
soon as possible. The deadline is June 18.
Thank you and I look forward to your response.
Bret Scaliter, Irrigation Editor
------------------------------
Date: Sat, 24 May 1997 21:08:47 -0700
From: Richard Mead (rmead@AGRILINK-INT.COM)
Subject: Weather and River Data CD
I normally don't put commercial material on Trickle-L, but the information
below might be of interest to some on the list. The "advertisement" appears
to be oriented toward U.S. data.
R. Mead
Trickle-L owner
------------------------
A $45 CD-ROM TO RAPIDLY RESEARCH NATIONWIDE WEATHER AND RIVER DATA
Hydrosphere's
Resource Disc integrates windows software and multi-agency databases for
convenient
research and curriculum development. $45 annual subscription or $125
purchase.
*Instantly search, locate, and review summaries of reported NCDC weather and
USGS river data
*Immediately map station locations in geographic context using popular GIS
software
*Easily develop curriculum with the companion multi-agency watershed
databases
Nationwide "Station Finder" databases are summaries of reported data for
all current and discontinued NCDC and USGS stations.
ArcView and MapInfo GIS coverages for all databases include station points,
tables, and state/county polygons.
Watershed databases are enhanced with EPA water quality data, summaries
plus reported values for all agency topics, and additional GIS content.
Dialogue boxes and pick lists facilitate easy database searching. Data views
display pertinent information. Point-and-click buttons instantly print or
copy it.
Search Resource Disc databases for stations by name, i.d., state, county,
lat/long or elevation. Also search for specific parameters, number of years
reported, or other reported information.
The U.S. weather database includes summaries of reported precipitation,
temperature, and evaporation data for 28,000 NCDC stations. The U.S. river
database includes summaries of reported stream flow, stage, and related
parameters for 62,000 USGS stations.
For broader curriculum development and expanded GIS use, companion
watersheds (Guadalupe and Iowa-Cedar Rivers) include all reported NCDC,
USGS time-series data, complete EPA STORET water quality data, hydrologic
Unit polygons, and EPA River Reach vectors.
Hydrosphere Data Products, Inc. Publishing Ready-to-Use Environmental
Information.
For more information call 303-443-7839, FAX 303-442-0616, email
hdpinfo@hydrosphere.com or visit our web page http://www.hydrosphere.com
------------------------------
End of TRICKLE-L Digest - 23 May 1997 to 24 May 1997
****************************************************
Date: Mon, 26 May 1997 00:02:48 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 24 May 1997 to 25 May 1997
There is one message totalling 32 lines in this issue.
Topics of the day:
1. PVC and Poli
----------------------------------------------------------------------
Date: Sun, 25 May 1997 22:01:22 -0300
From: Rubens Duarte Coelho (rdcoelho@CARPA.CIAGRI.USP.BR)
Subject: PVC and Poli
Dear friends from Trickle List
I am looking for good books about PVC and polyethylene pipes for drip
and trickle irrigation .... does anyone Know any reference ?? I am trying
to understand a little more about BLENDS and extrusion process .... the
problem I am facing is: How to compare differents brands of plastic tubes
(Netafim, Naan, Plastro etc). Everyone know that there is basically 3
types of materials of polyethylene (High density, Low density and Linear)
and that no one buys length of pipe but weight of material..... the
question I am try to aswer is: why two different manufactures using the
same kind of polyethylene resin (for example low density) sell different
pipe thicknes for the same pressure class ? the answer certainly is the
blend..... additives !!! but reducing polyethylene weight/ha from 100
kg/ha to 50 kg/ha (citrus irrigation) is really a miracle !!!! where is
the secret ? ... I don't believe that the irrigation industry is able to
make research on polyethylene resins and additives !! Only big company as
Union Carbide, Dow, etc .... are able to do that, as well as eager to
spread good news products for every irrigation industry (potential
clients) !!!
Thank You in antecipating for any comments !!
Rubens Coelho
------------------------------
End of TRICKLE-L Digest - 24 May 1997 to 25 May 1997
****************************************************
Date: Tue, 27 May 1997 00:02:35 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 25 May 1997 to 26 May 1997
There are 2 messages totalling 37 lines in this issue.
Topics of the day:
1. PVC and Poli (2)
----------------------------------------------------------------------
Date: Mon, 26 May 1997 12:28:56 -0200
From: Luiz Lima (luizlima@METALINK.COM.BR)
Subject: Re: PVC and Poli
Dear Rubens,
I do have some reference on PEBD and PVC pipes for irrigation. They
are in portuguese and can be helpful. I will organize the references
and send them to you a.s.a.p.
Best regards,
Luiz Lima
Federal University of Lavras / Brazil.
------------------------------
Date: Mon, 26 May 1997 15:32:19 -0400
From: Tom Glazener (glazener@JUNO.COM)
Subject: Re: PVC and Poli
While I am not aware of references for the standards that you request, I
would certainly write to each manufacturer and request information as to
the resin choice, and how they explain their position vis
features/benefits. Also you may ask them what engineering standards they
hold themselves to and what outside body they use for product audit. Do
they have climate conditions that they are taking into consideration. Is
it cost of materials and price point? It would help you to get some of
this information from the corporate sales and marketing side while
working the engineering and production standards side.
Tom Glazener
------------------------------
End of TRICKLE-L Digest - 25 May 1997 to 26 May 1997
****************************************************
Date: Wed, 28 May 1997 00:01:44 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 26 May 1997 to 27 May 1997
There is one message totalling 36 lines in this issue.
Topics of the day:
1. PVC and Poli(25 May 1997)
----------------------------------------------------------------------
Date: Tue, 27 May 1997 13:18:49 -0500
From: alekperc@BGUMAIL.BGU.AC.IL
Subject: Re: PVC and Poli(25 May 1997)
Dear Rubens
Maybe you help this reference A.Benami and A.Ofen 1993. Irrigation Enginering.
Chapter 3. pp.147-192.You can find more referenceson page 191.
My best regardse.
Dr. Chingiz Alekperov
(I am looking for good books about PVC and polyethylene pipes for drip
and trickle irrigation .... does anyone Know any reference ?? I am trying
to understand a little more about BLENDS and extrusion process .... the
problem I am facing is: How to compare differents brands of plastic tubes
(Netafim, Naan, Plastro etc). Everyone know that there is basically 3
types of materials of polyethylene (High density, Low density and Linear)
and that no one buys length of pipe but weight of material..... the
question I am try to aswer is: why two different manufactures using the
same kind of polyethylene resin (for example low density) sell different
pipe thicknes for the same pressure class ? the answer certainly is the
blend..... additives !!! but reducing polyethylene weight/ha from 100
kg/ha to 50 kg/ha (citrus irrigation) is really a miracle !!!! where is
the secret ? ... I don't believe that the irrigation industry is able to
make research on polyethylene resins and additives !! Only big company as
Union Carbide, Dow, etc .... are able to do that, as well as eager to
spread good news products for every irrigation industry (potential
clients) !!!
Thank You in antecipating for any comments !!
Rubens Coelho)
------------------------------
End of TRICKLE-L Digest - 26 May 1997 to 27 May 1997
****************************************************
Date: Thu, 29 May 1997 00:02:20 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 27 May 1997 to 28 May 1997
There is one message totalling 63 lines in this issue.
Topics of the day:
1. ceramics, anyone?
----------------------------------------------------------------------
Date: Wed, 28 May 1997 17:16:22 -0700
From: Jochen Eberhard (Jochen.Eberhard@T-ONLINE.DE)
Subject: Re: ceramics, anyone?
Ken Shackel wrote:
)
) Dear Tricklers,
)
) Can anyone give me some advice/place to check/whatever, on making
) porous ceramics? I need to make a rod (or tube) about 10" long, 1/2" or so
) in OD, and would like the material to have an air entry value of about 10 or
) 15 bars. Soil Moisture corporation makes a cup of the right size, but only
) out of 1 bar material, and, after a long wait, they have finally told me
) they are unable (or unwilling, I wasn't sure which) to make it out of
) smaller porosity material (I only need 2). Are there any commercial
) suppliers of the raw ceramic materials (soil moisture also told me their
) materials were proprietary when I suggested I could give it a try myself)?
) Thanks.
)
) Ken Shackel
) Department of Pomology
) University of California
) Davis, CA 95616-8683
) [note: new area code (530) as of November 1, 1997]
) Phone (916) 752-0928
) Fax (916) 752-8502
Dear Ken,
I do have an address in Germany which you might contact it is:
Hoechst CeramTec AG
Postfach 109
95614 Marktredwitz
Phone: 0049-9231-69-1
or : -69-419 (Mr. Schroeter)
or : -69-218 (Mr. Konz)
Fax: 049-9231-96-217
they produce ceramics for industries and analytical purposes. Maybe they
do have an office somewhere in the US.
Best regards
Jochen
--
_____________________________________________________________
| Jochen Eberhard * * |
| SLFA Versuchsbetriebe ( \ / ) |
| Queckbrunnerhof \ / |
| Dannstadter Str. 91 --- |
| 67105 Schifferstadt (o|o) |
| Germany ( ~~~ ) |
| ( ) |
| Tel: 0049 - 6235 - 2672 ( ) |
| Fax: - - 82741 ( ooO Ooo ) |
| email: Jochen.Eberhard@t-online.de |
|_____________________________________________________________|
------------------------------
End of TRICKLE-L Digest - 27 May 1997 to 28 May 1997
****************************************************
Date: Sat, 31 May 1997 00:02:22 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 29 May 1997 to 30 May 1997
There are 3 messages totalling 308 lines in this issue.
Topics of the day:
1. ceramics, anyone?
2. Salinity / pH responses to date ....
3. salinity/pH
----------------------------------------------------------------------
Date: Fri, 30 May 1997 17:05:28 +0200
From: "Thomas-M. Stein" (stein@WIZ.UNI-KASSEL.DE)
Subject: Re: ceramics, anyone?
Ken
You wrote:
[Text deleted]
)Are there any commercial
)suppliers of the raw ceramic materials (soil moisture also told me their
)materials were proprietary when I suggested I could give it a try myself)?
)Thanks.
)
)Ken Shackel
I just want to add another German address and a Dutch one you may want
to give a try. They both produce (sell) different porous cereamics for
laboratory use.
-----------------
K P M
(Koenigliche Porzellan Manufaktur Berlin GmbH)
Wegelystrasse 1
D-10623 Berlin 12
Germany
Tel.: 030 / 39009-0
Fax : 030 / 3919034
----------------
Eijkelkamp
Agrisearch Equipment
P.O.Box 4
Nijverheidsstraat 30
6987 ZG Giesbeek
The Netherlands
Tel.: +31 313 63 19 41
Fax : +31 313 63 21 67
Email: eijkelkamp@company.diva.nl
WWW: http://www.diva.nl/eijkelkamp/
Contact: Gerard van Dijk
Best regards
Thomas
______________________________________________________________________________
Thomas-M. Stein
University of Kassel (FB11) Phone : (+49)-5542-98-1632
Dep. of Rural Engineering and Fax : (+49)-5542-98-1588
Natural Resource Protection Email : stein@wiz.uni-kassel.de
Nordbahnhofstr. 1a WWW : http://www.wiz.uni-kassel.de/kww/
D-37213 Witzenhausen, GERMANY List owner: IRRIGATION-L@listserv.gmd.de
______________________________________________________________________________
------------------------------
Date: Fri, 30 May 1997 11:50:32 -0500
From: "W. Bryan Smith" (wsmth@CLEMSON.EDU)
Subject: Salinity / pH responses to date ....
Many thanks for the replies on pH/Salinity! Here are the responses I
have received to date - as well as a complete water test for the
water in question. I will continue to forward responses as I receive them (if
they are not posted to the list).
Bryan
=============================
Here's the full water test info FYI:
Soluble salts 1.04 mmhos/cm
pH 8.46
Alkalinity 542 ppm
Ca 3.2 ppm
Mg 2.7 ppm
Na 271 ppm
Cl 51.3 ppm
B 0.721 ppm
F 2.12 ppm
Fe 0.0 ppm
Mn 0.0 ppm
Cu 0.0 ppm
Zn 0.031 ppm
Mo 0.013 ppm
Al 0.0 ppm
NO3-N 6.1 ppm
NH4-N 0.0 ppm
Total N 6.10 ppm
P 0.009 ppm
K 9.70 ppm
===========================
The word buffer may mean the following: IF THE SOIL CONTAINES
CALCITE (SOIL LIME), the acidified water will dissolve the lime
thereby increasing the calcium concentration. This would reduce the
exchangeable sodium levels in the soil and may make improve calcium
nutrition for the plant. Some plants are more sensitive than others
to low calcium levels in the presence of high sodium levels. The
research experience on which plant species is relatively limited -- most is
known for agronomic crops. BUT THE SOIL WOULD HAVE TO BE
CALCAREOUS FOR THE CALCIUM LEVELS TO BE INCREASED
AS A RESULT OF ACIDIFICATION OF THE WATER. The
increased calcium levels will also worsen the salinity problem, it will
increase the electrical conductivity of the soil solution.
J.D.(Jim) Oster
Soil and Water Specialist and Adjunct Professor
Soil and Environmental Sciences
University of California
Riverside, CA.
FAX: 909 787-5522
P.O Box 1344
Graeagle CA 96103
Telehones
VOICE:
Riverside Office 909 787-5100 Nov 1997
Graeagle Office 916 8360938 May through October 1997
e-mail: Oster@mail.ucr.edu
http://esce.ucr.edu
============================
hello!
i'm not sure if this information will be helpful concerning pH
reduction. i am sympathetic with the grower who does not want to
expose himself to the fumes and dangers of handling the commonly
used pH reducing acids. i am conducting some hydroponic research,
and switched to a great product for pH reduction after burning myself
and inhaling fumes.
the product is called SEPLEX and it is an organic acid with tremendous
acidifying capacity, yet it is fumeless and safe to handle. you can put
your hand right into it. but it does work! it is made up only of O, C
and H, so it adds nothing to your fertilizer. it's also useful in
cleaning out fertigation lines. It is available from a company called
Greencare based in chicago. if you are interested, let me know, and i
will dig up the phone number and fax for you!
Josee Owen
Mcgill University
==================================
By difference, using the charge concentrations of the major cations
and anions, there must be about 100 ppm of sulfate. Sulfate doesn't pose
a problem.
Na 271 ppm 11.8 mmolc/L. SAR is 19.3, a level where some plants
exhibit calcium deficiences -- this results in poor growth of
blossoms and tissue which is distant from the xylem. Curled, serrated, burned
edges of corn is another sympton. Also, leaf burn from sprinkler
applied water could be another problem.
Cl 51.3 ppm 1.4 meq/l (mmolc/L) which generally is a safe level,
tissue burn due to chloride uptake by roots, or by leaf adsorption of
sprinkler applied water begins to be a potential problem at about 5
mmoc/L, particularly for plants which do not have leaves with thick
cuticles. Same for sodium.
Recommendation: Adjust pH to 7 with sulphuric acid -- its not that
difficult to handle with the right equipment. Add CaCL2 at a rate of
3 mmolc/L (165 ppm). I think of the two, I would add the salt first. pH
would not be a problem for most plants except for some that really
like acide soils like azelias and camelias. I know this seems like the
salinity problems would be made worse. But, a 1.3 dS/m water is not a major
problem except for VERY sensitive plants.
Also, the water should not be applied with sprinklers, particularly
during the day. The leaves need a chance to drip dry under cool, low
sun conditions to minimize salt adsorption through the leaves. It
would be best to use drip irrigation, and at a rate where the drainage
water is 20 - 30 % of the applied water. DRAINAGE IS AN ESSENTIAL
ASPECT OF SUSTAINABLE IRRIGATION. THE GROWER MUST
HAVE A WAY OF DISPOSING DRAINAGE WATER. Maybe he
should use it to irrigate bermuda grass or 'cutsu'. It may not cause
too big a problem if it is applied to Kentucky bluegrass, if it is
overwatered.
J.D.(Jim) Oster
Soil and Water Specialist and Adjunct Professor
Soil and Environmental Sciences
University of California
Riverside, CA.
FAX: 909 787-5522
P.O Box 1344
Graeagle CA 96103
Telehones
VOICE:
Riverside Office 909 787-5100 Nov 1997
Graeagle Office 916 8360938 May through October 1997
e-mail: Oster@mail.ucr.edu
http://esce.ucr.edu
============================
Bryan,
Consider using N-pHURIC, a urea sulfuric acid in place of
sulfuric acid. N-pHURIC is very safe to handle. It will still eat holes in
your clothes but you can put your finger right in the stuff and not get
burned. Steve Purcell from Unocal poured some right onto his hand
during a seminar and didn't wash his hands until after his talk was
over. There are different acid equivalent strengths you can buy. The urea
adds some nitrogen, about 15% N with the usual formulation.
Unocal will do a free titration of the water to determine what
the application rate needs to be for a desired pH. Lowering water to a pH
of 6.5 removes 65% of bicarbonates; 90% bicarbonates are removed at
a pH of 4.5. Since you don't mention how much Ca there is in the
water, it is hard to tell how much acidification will help with the
Na problem. What you are trying to do with acid is to remove bicarbonate
which ties up Ca, preventing it from counteracting the harmful
effects of Na. You can see this by looking at a measurement of SAR (sodium
adsorption ratio) compared with adjusted SAR. SAR compares the
ratio of Na with Ca and Mg; adjusted SAR takes into account
bicarbonate and carbonate. High carbonate and bicarbonate present in
high pH water will show a substantially higher adjusted SAR reading
compared to unadjusted SAR. Adding acid will bring the adjusted
SAR in line with unadjusted SAR.
Jerome Pier
Agronomist
Netafim Irrigation, Inc.
jpier@mindspring.com
===================================
END.
=|===|===|===|===|===|===|===|===|===|===|=
W. Bryan Smith
Area Extension Agent - Irrigation / Water Quality
Clemson Extension Service
P.O. Box 160
Newberry, South Carolina 29108 USA
Office: 803 276-1091 FAX: 803 276-1095
Internet: wsmth@clemson.edu
=|===|===|===|===|===|===|===|===|===|===|=
All opinions are my own and not reflective of the
policies of Clemson University or the Cooperative
Extension Service.
------------------------------
Date: Fri, 30 May 1997 12:32:33 -0700
From: "J.D. Oster" (oster@MAIL.UCR.EDU)
Subject: salinity/pH
I recommended adding calcium chloride at a rate of 3 mmolc/L (3 meq/L).
One could also add gypsum at the same rate. (italic)In regard to
(/italic)adding calcium chloride, this would require a reservoir
containing a concentrated solution of calcium chloride and a metering
pump or a venturi injector system to inject it at a controlled rate. In
regard to gypsum, Solutions Systems in Visalia California sells equipment
which does a good job at injecting gypsum in the water. Contact Tom
Fairweather at 209 645 5742.
J.D.(Jim) Oster
Soil and Water Specialist and Adjunct Professor
Soil and Environmental Sciences
University of California
Riverside, CA.
FAX: 909 787-5522
P.O Box 1344
Graeagle CA 96103
Telehones
VOICE:
Riverside Office 909 787-5100 Nov 1997
Graeagle Office 916 8360938 May through October 1997
e-mail: Oster@mail.ucr.edu
http://esce.ucr.edu
------------------------------
End of TRICKLE-L Digest - 29 May 1997 to 30 May 1997
****************************************************
Date: Sun, 01 Jun 1997 00:01:07 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 30 May 1997 to 31 May 1997
There is one message totalling 15 lines in this issue.
Topics of the day:
1. Stand Pipe
----------------------------------------------------------------------
Date: Sat, 31 May 1997 12:06:50 -0600
From: Rick Simpson (bcsl@POBOX.COM)
Subject: Stand Pipe
I want to establish a relief for overpressure by errecting a
stand pipe using two inch PVC. Can someone give me the formula for
how tall a pipe I need for certain pressure relief (overflow)?
Rick
------------------------------
End of TRICKLE-L Digest - 30 May 1997 to 31 May 1997
****************************************************
Date: Tue, 03 Jun 1997 00:01:24 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 31 May 1997 to 2 Jun 1997
There are 2 messages totalling 87 lines in this issue.
Topics of the day:
1. Stand Pipe (2)
----------------------------------------------------------------------
Date: Mon, 2 Jun 1997 08:42:50 -0500
From: "W. Bryan Smith" (wsmth@CLEMSON.EDU)
Subject: Re: Stand Pipe
Rick,
The formula is:
1 psi = 2.308 feet of water
So, for example, if you had 10 psi on the main line, the 2" (or any
size) riser pipe would have to stand:
10 psi x 2.308 ft/psi = 23.08 feet tall
Any pressure over 10 psi for this height would cause the pipe to
overflow. The pipe gets tall rather quickly!
There are some excellent pressure relief, pressure reducing, and
pressure sustaining valves out there - the ones I am familiar with are
a diaphram-type valve with an adjustable regulator attached. This may
be what you need if the stand pipe idea proves too cumbersome. I've
used them with excellent results. There are also some "surge plugs" out
that are meant more for water hammer than pressure regulation if that is
your concern.
Bryan
) I want to establish a relief for overpressure by errecting a
) stand pipe using two inch PVC. Can someone give me the formula for
) how tall a pipe I need for certain pressure relief (overflow)?
)
) Rick
)
=|===|===|===|===|===|===|===|===|===|===|=
W. Bryan Smith
Area Extension Agent - Irrigation / Water Quality
Clemson Extension Service
P.O. Box 160, Newberry, South Carolina 29108 USA
Office: 803 276-1091 FAX: 803 276-1095
Internet: wsmth@clemson.edu
=|===|===|===|===|===|===|===|===|===|===|=
All opinions are my own and not reflective of the
policies of Clemson University or the Cooperative
Extension Service.
------------------------------
Date: Tue, 3 Jun 1997 14:52:05 +1200
From: Andrew Barber (barber.a@CLEAR.NET.NZ)
Subject: Stand Pipe
Rick & Bryan,
Re: Stand pipe height. 1 psi = 2.308 feet of water That looked all very
complicated.
Of course the alternative is to use the metric system!
1 meter of pressure(mH) = 1 meter of water (it almost seems logical)
So, for example, if you had 10 meters head on the main line, the 2" (or
any
size) riser pipe would have to stand:
10 m x 1 = 10.0 meters tall
Any pressure over 10 m for this height would cause the pipe to
overflow. The pipe gets tall rather quickly!
Just a thought. :-)
Andrew Barber
Engineering Consultant
Agriculture New Zealand Ltd
ph + 64 9 238 9613
barber.a@clear.net.nz
------------------------------
End of TRICKLE-L Digest - 31 May 1997 to 2 Jun 1997
***************************************************
Date: Wed, 04 Jun 1997 00:01:53 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 2 Jun 1997 to 3 Jun 1997
There are 5 messages totalling 160 lines in this issue.
Topics of the day:
1. Olives (2)
2. SDI: wireworms and tomatoes
3. Gypsum & High SAR in the Coachella Valley
4. Water to Minitubers
----------------------------------------------------------------------
Date: Tue, 3 Jun 1997 21:24:49 +1000
From: Wally Menke (wallym@OZEMAIL.COM.AU)
Subject: Olives
Has anyone out there had any experience with growing Olive trees with SDI?
I have a grower planting new trees who is very keen to install the dripline
underground, so far all the information I have is a bit sketchey and variable.
So far also the water requirements of Olive tree's is also a bit of an
unknown. I have had varying figures from 20% - 60% of Et rates quoted. Has
anyone done any work on this who could advise?, as any reliable information
would be a great help.
Regards
Wally Menke
------------------------------
Date: Tue, 3 Jun 1997 13:33:09 -0700
From: Jochen Eberhard (Jochen.Eberhard@T-ONLINE.DE)
Subject: SDI: wireworms and tomatoes
Hi Fellows,
only wise people have the choice between stupid and intelligent
questions. As I would not call me wise I only can ask the first kind of
questions :-)) and I have got two of them:
1) we have a SDI systems here on our vegetable research farm just
installed two month ago. It is the fist in this area and knowledge is
very poor. The crop is onions and the tape was supposed to be 20 cm
deep, after settling of the soil it is now between 10 and 15 cm deep.
The field is about 0.5 ha. We have had lots of problems up to now, but
the worst are wireworms. Never heard of being a problem on the farm but
the worms like the tape very much. We have already fixed at least 10
holes. Today we applied a heavy dosis of pesticids but if we do not get
the problem under control the idea of SDI will have no chance to be
established in this area. Is there anything else we can do about the
wireworms? Somebody told me to put the tape deeper in the soil. Might
this work?
Any ideas are highly appreciated.
2) My second question is about subsurface drip irrigation (SDI) on
tomatoes. I do have a small trial on a sandy loam soil with the tape
30cm deep. The tomatoes were transplanted with the fist cluster
beginning to bloom. They are doing very well up to now. My fist
experience is that it is very difficult to supply enough water right
after transplanting, and that one needs much more water in the phase
than with surface drip. Another thing is that this tomatoes seem to need
a longer time after transplanting before they start to grow. The surface
drip irrigated plants showed almost no depression in growth due to
transplanting. A possitive sideeffect is, part of the SDI-tomatoes are
raised without black plastic mulch, (it is all in a simple nonheated
greenhouse, so rain is no problem) and I do not have -up to now, 5th
week - any problems with weeds. The original idea was to use the
SDI-sytem several years. So now my question: is there anybody out there
with tomatoes on SDI willing to answer my stupid questions which I might
have every now and then.
Thanks in advance for any help.
Jochen
_____________________________________________________________
| Jochen Eberhard * * |
| SLFA Versuchsbetriebe ( \ / ) |
| Queckbrunnerhof \ / |
| Dannstadter Str. 91 --- |
| 67105 Schifferstadt (o|o) |
| Germany ( ~~~ ) |
| ( ) |
| Tel: 0049 - 6235 - 2672 ( ) |
| Fax: - - 82741 ( ooO Ooo ) |
| email: Jochen.Eberhard@t-online.de |
|_____________________________________________________________|
------------------------------
Date: Tue, 3 Jun 1997 20:42:50 +0800
From: Mitch Sala-Tenna (mitch@SALA-TENNA.COM.AU)
Subject: Re: Olives
Wally Menke wrote:
)
) Has anyone out there had any experience with growing Olive trees with SDI?
)
) I have a grower planting new trees who is very keen to install the dripline
) underground, so far all the information I have is a bit sketchey and variable.
)
) So far also the water requirements of Olive tree's is also a bit of an
) unknown. I have had varying figures from 20% - 60% of Et rates quoted. Has
) anyone done any work on this who could advise?, as any reliable information
) would be a great help.
)
) Regards
)
) Wally Menke
Wally,
I had the same problem some months ago and my conclusion was that the
amount of water applied is not critical except during fruit setting
(southern hemisphere september-december). Any shortfall in irrigation
outside this period will probably only affect fruit size not quality. It
depends whether the intended market is for preserving or oil production.
I suggest you contact Olea Nurseries in Manjimup (WA) as they seem to be
promoting olives in Western Australia.
Mitch
------------------------------
Date: Tue, 3 Jun 1997 18:37:15 -0700
From: Robert Carian (grapegrower@EARTHLINK.NET)
Subject: Gypsum & High SAR in the Coachella Valley
I have a Perlette vineyard in Coachella Valley irrigated with well water
with a high SAR. I was told by Sam Aslan (local usda soil guy) that I
need to inject gypsum with my water. Water flow is @ 400 gpm for the 20
acres. I was also told that there are injectors that can be purchased
for this purpose (inject dry bulk gypsum into a drip system). Any
thoughts on design or products??
------------------------------
Date: Tue, 3 Jun 1997 22:41:40 -0400
From: GroAire@AOL.COM
Subject: Re: Water to Minitubers
Hello, My name is Dave Enyeart of GroAire Irrigation. I have been involved
in research of the Norgold M variety for the micropropagation of minitubers
in greenhouses. The University of Nebraska cloned the variety because of
disease resistance but were having trouble inb the University houses getting
them to produce. They were only getting 2 tubers per plant inj 16 weeks. We
increased the production to 8 tubers per plant in 9 weeks. The system was in
3 foot wide beds that had 10 inches of soil. The drip and subaeration system
was placed at 5 inches in depth with lateral spacing of 12 inches and
emittiers in the tape of 8 inch spacing. I designed a humid air system at
irrigate and aerate at the same time. Several times during the growth cycle,
I had to shut the system down as my soil was getting too wet and I had to run
just the subsurface aeration system to adjust the moisture profile in the
soil. I used a total of 25 gallons of water to produce the tubers from the
time of transplanting to the time of haervest.
Dave Enyeart
GroAire Irrigation
303-650-0472 home office
GroAire@aol.com
------------------------------
End of TRICKLE-L Digest - 2 Jun 1997 to 3 Jun 1997
**************************************************
Date: Thu, 05 Jun 1997 00:01:06 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 3 Jun 1997 to 4 Jun 1997
There are 2 messages totalling 41 lines in this issue.
Topics of the day:
1. Plastic mulch use and ET
2. Quimigation on Sorgum and Cotton
----------------------------------------------------------------------
Date: Wed, 4 Jun 1997 08:43:14 -0400
From: "Dr. Ricardo Goenaga" (mayrg@SUN.ARS-GRIN.GOV)
Subject: Plastic mulch use and ET
Plastic mulching is a good barrier to water vapor flux and may affect
evapotranspiration (ET) of the crop by decreasing evaporation of soil
water. I have been unable to find a reference providing at least an
estimate for any crop on how much ET is reduced by the installation of
plastic mulch in planting beds. Can someone provide me with some data
in this regard? Your assistance will be appreciated.
------------------------------
Date: Wed, 4 Jun 1997 12:29:03 -0700
From: MC Sergio Decarlo =?iso-8859-1?Q?Guzm=E1n?= =?iso-8859-1?Q?_?=
=?iso-8859-1?Q?Ru=EDz?= (decarlo@TELNOR.NET)
Subject: Quimigation on Sorgum and Cotton
Dear friends from Trickle List
I am looking for iformation on products that I can use for drip and
trickle irrigation .... does anyone Know any reference ?? I am trying to use
insecticides and herbicides in sorgum and cotton and the problem that I am
facing is: I don't know any one for these cropos and frip irrigation.
Thank You in antecipating for any comments !!
Sergio Decarlo G.R.
decarlo@email.telnor.net
MC Sergio Decarlo Guzman Ruiz
Investigador de Uso y Manejo
del Agua de Riego en el CEMEXI
e-mail decarlo@email.telnor.net
------------------------------
End of TRICKLE-L Digest - 3 Jun 1997 to 4 Jun 1997
**************************************************
Date: Fri, 06 Jun 1997 00:01:13 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 4 Jun 1997 to 5 Jun 1997
There are 9 messages totalling 381 lines in this issue.
Topics of the day:
1. Few: Plastic mulch use and ET (4)
2. Quimigation on Sorgum and Cotton
3. Irrigation Satelite Controllers (2)
4. Re[2]: Irrigation Satelite Controllers
5. Gypsum & High SAR in the Coachella Valley
----------------------------------------------------------------------
Date: Thu, 5 Jun 1997 19:08:08 +1200
From: Andrew Barber (barber.a@CLEAR.NET.NZ)
Subject: Few: Plastic mulch use and ET
----------
Dr. Ricardo Goenaga wrote
) Plastic mulching is a good barrier to water vapor flux and may affect
) evapotranspiration (ET) of the crop by decreasing evaporation of soil
) water. Can someone provide me with some data
) in this regard? Your assistance will be appreciated.
I can't provide any data but I would not expect a plastic cover to have a
very dramatic effect on the rate of ET. I say this because as the top
layer of soil dries out (even just the first 2-3cm (1")) leaving air gaps,
it to becomes a great barrier to water loss. It is my understanding that
by far the greatest component of ET is transpiration.
Andrew Barber
Engineering Consultant
Agriculture New Zealand Ltd
ph + 64 9 238 9613
barber.a@clear.net.nz
------------------------------
Date: Thu, 5 Jun 1997 11:20:09 +0300
From: alekperc@BGUMAIL.BGU.AC.IL
Subject: Re: Quimigation on Sorgum and Cotton
Dear friend Sergio Decarlo G.R.
I think the reference: - Irrigation of agricultural crops.1990. Edited by
B.A. Stemwart & D.R. Nielsen.Number 30 series Agronomy.p.p.719-775, will be
help you.
My best Regards Dr. Chingiz K. Alekperov Agrobiology Center Inst. for
Desert Research.
------------------------------
Date: Thu, 5 Jun 1997 07:06:58 -0400
From: "Dr. Ricardo Goenaga" (mayrg@SUN.ARS-GRIN.GOV)
Subject: Re: Few: Plastic mulch use and ET
Andrew Barber wrote:
)
) ----------
) Dr. Ricardo Goenaga wrote
)
) ) Plastic mulching is a good barrier to water vapor flux and may affect
) ) evapotranspiration (ET) of the crop by decreasing evaporation of soil
) ) water. Can someone provide me with some data
) ) in this regard? Your assistance will be appreciated.
)
) I can't provide any data but I would not expect a plastic cover to have a
) very dramatic effect on the rate of ET. I say this because as the top
) layer of soil dries out (even just the first 2-3cm (1")) leaving air gaps,
) it to becomes a great barrier to water loss. It is my understanding that
) by far the greatest component of ET is transpiration.
)
) Andrew Barber
) Engineering Consultant
) Agriculture New Zealand Ltd
) ph + 64 9 238 9613
) barber.a@clear.net.nz
Thank you very much for your information.
Regards,
Ricardo Goenaga
------------------------------
Date: Thu, 5 Jun 1997 16:16:03 -0700
From: Keith Weatherhead (K.Weatherhead@CRANFIELD.AC.UK)
Subject: Re: Few: Plastic mulch use and ET
Be careful, the effect of mulches isn't as simple as just reducing soil evaporation.
1. All mulches intercept some of the rainfall and overhead irrigation. Plastics are not as
bad as many other mulches, but this partly cancels out the gains.
2. The plastic may deflect rainfall or overhead irrigation away from the crop rows.
3. The temperature and humidity under the plastic are increased, which will change crop
transpiration rates. The plastic and any condensation also reduce sunlight.
4. Condensation on the plastic, dripping back onto the crop, can be highly non-uniform.
5. Most of the savings on soil evaporation are in the early part of the season, when
perhaps water availability is not so critical.
6. The higher temperatures could accelerate crop development.
Finding numbers to put on these effects is difficult.
) Andrew Barber wrote:
) ) Dr. Ricardo Goenaga wrote
) )
) ) ) Plastic mulching is a good barrier to water vapor flux and may affect
) ) ) evapotranspiration (ET) of the crop by decreasing evaporation of soil
) ) ) water. Can someone provide me with some data
) ) ) in this regard? Your assistance will be appreciated.
) )
) ) I can't provide any data but I would not expect a plastic cover to have a
) ) very dramatic effect on the rate of ET. I say this because as the top
) ) layer of soil dries out (even just the first 2-3cm (1")) leaving air gaps,
) ) it to becomes a great barrier to water loss. It is my understanding that
) ) by far the greatest component of ET is transpiration.
) )
) ) Andrew Barber
) ) Engineering Consultant
) ) Agriculture New Zealand Ltd
) ) ph + 64 9 238 9613
) ) barber.a@clear.net.nz
Keith Weatherhead
Cranfield University, School of Agriculture, Food and Environment,
Silsoe, Bedford, MK45 4DT, UK.
Telephone: +44 (0)1525 863336 (work)
Fax: +44 (0)1525 863300, or +44 (0)1525 863001
E-mail: k.weatherhead@cranfield.ac.uk
WWW: http://www.cranfield.ac.uk/safe/people/kweather.htm
------------------------------
Date: Thu, 5 Jun 1997 13:22:11 -0700
From: Graham Hutchinson (hutch@BMI.NET)
Subject: Irrigation Satelite Controllers
Hi
I am looking for an irrigation controller that has radio links with
satelite stations in the field. The satelite stations should be able to
control a number of valves, a pump and fertigation unit.
If anyone has contact details for companies who manufacture this type of
unit please post them or email them to hutch@bmi.net
Thank you very much
Graham Hutchinson
------------------------------
Date: Thu, 5 Jun 1997 16:35:25 -0400
From: "Craig A. Storlie" (storlie@AESOP.RUTGERS.EDU)
Subject: Re: Few: Plastic mulch use and ET
Keith:
I couldn't help but respond. Plastic mulch and drip irrigation have
revolutionized vegetable production in certain parts of the country. We
can grow 2-5 times the produce with half of the water.
Keith Weatherhead wrote:
)
) Be careful, the effect of mulches isn't as simple as just reducing soil evaporation.
)
) 1. All mulches intercept some of the rainfall and overhead irrigation. Plastics are not as
) bad as many other mulches, but this partly cancels out the gains.
What is "bad"? Please explain.
)
) 2. The plastic may deflect rainfall or overhead irrigation away from the crop rows.
This is an advantage in the humid east where soil-borne diseases are a
major problem. We dome our beds to move that off the bed and into the
ally.
)
) 3. The temperature and humidity under the plastic are increased, which will change crop
) transpiration rates. The plastic and any condensation also reduce sunlight.
Soil warming grows plants faster, increases earliness - another key
advantage in northern climates. Warm soil increases transpiration?
Indirectly, I suppose.
)
) 4. Condensation on the plastic, dripping back onto the crop, can be highly non-uniform.
My experience is that condensation in pretty uniform. In either case,
the amount of water we are talking about is "small". At least it stays
in the bed as opposed to evaporation to the atmosphere.
)
) 5. Most of the savings on soil evaporation are in the early part of the season, when
) perhaps water availability is not so critical.
Yes, but transplant establishment is another important factor to
consider. Small root systems need lottsa help - mulch makes the tough
goin' a little easier on those little guys.
)
) 6. The higher temperatures could accelerate crop development.
Yes, see #3 above.
)
) Finding numbers to put on these effects is difficult.
Actually, lots of mulch research has been done.
Craig Storlie
Rutgers University
------------------------------
Date: Thu, 5 Jun 1997 17:57:42 -0400
From: Cal Corcoran (clayton29@PIPELINE.COM)
Subject: Re: Irrigation Satelite Controllers
At 01:22 PM 6/5/97 -0700, you wrote:
)Hi
)
)I am looking for an irrigation controller that has radio links with
)satelite stations in the field. The satelite stations should be able to
)control a number of valves, a pump and fertigation unit.
)
)If anyone has contact details for companies who manufacture this type of
)unit please post them or email them to hutch@bmi.net
)
)Thank you very much
)Graham Hutchinson
)
Dear Graham,
There are many units available like you mention. Unfortunately they are
primarly A.C. units and most ag situations are have a D.C. requirement.
Keep in mind there are a couple of D.C. units out there though. Unless we
are dealing with miles of distance or major variations in elevation it works
best to use hydraulic valves and relays which provides centralized control
with no need for radio links and satelite stations.
I have done many systems with various requirments. Most anything can be
accomplished at suprisingly low costs, but a more complete description of
what you want to do is required. What are the distances? What kind of
valves? Can you still select another valve? Is A.C. power available? How
accurate do you want to inject fertilizer? etc.
After being on Trickle-L for some time this is my first participation and it
this would be a "fun" one. I would like to add my two cents.
Cal Corcoran
clayton29@pipeline.com
------------------------------
Date: Thu, 5 Jun 1997 17:11:00 -0500
From: Dave Megeath-CIRR03 (Dave_Megeath-CIRR03@EMAIL.MOT.COM)
Subject: Re[2]: Irrigation Satelite Controllers
Message authorized by:
: clayton29@PIPELINE.COM@INTERNET at EMAIL
You might consider MOTOROLA. We have a line of DC operated controls
including IMPACT, a radio linked valve actuator.
For satellite stations in the field, ask for Scorpio-DC which comes
with 2/8 or 4/16 digital input/output capacity. The unit needs 12 VDC
and it's outputs are 24 VDC latching (polarity reversing) type,
compatible to Hardie IBOQ type solenoids, as well as our own solenoid
for connection to hydraulic tubes.
Scorpio communicates over short haul (2 watts UHF or VHF) radio to
IRRInet, which can either be a master field satellite and/or the
central interface.
The IRRInet central interface provides a PC-based Motorola-proprietary
software for monitor, display, and programming.
Let me know your location and I can direct you to one of our Value
Added Resellers that provide in-field engineering and service.
Regards,
Dave Megeath
MOTOROLA
World Wide Data Solutions Division
tel 916-536-0305
______________________________ Reply Separator _________________________________
Subject: Re: Irrigation Satelite Controllers
Author: TRICKLE-L@crcvms.unl.edu@INTERNET at EMAIL
Date: 6/5/97 4:57 PM
At 01:22 PM 6/5/97 -0700, you wrote:
)Hi
)
)I am looking for an irrigation controller that has radio links with
)satelite stations in the field. The satelite stations should be able to
)control a number of valves, a pump and fertigation unit.
)
)If anyone has contact details for companies who manufacture this type of
)unit please post them or email them to hutch@bmi.net
)
)Thank you very much
)Graham Hutchinson
)
Dear Graham,
There are many units available like you mention. Unfortunately they are
primarly A.C. units and most ag situations are have a D.C. requirement.
Keep in mind there are a couple of D.C. units out there though. Unless we
are dealing with miles of distance or major variations in elevation it works
best to use hydraulic valves and relays which provides centralized control
with no need for radio links and satelite stations.
I have done many systems with various requirments. Most anything can be
accomplished at suprisingly low costs, but a more complete description of
what you want to do is required. What are the distances? What kind of
valves? Can you still select another valve? Is A.C. power available? How
accurate do you want to inject fertilizer? etc.
After being on Trickle-L for some time this is my first participation and it
this would be a "fun" one. I would like to add my two cents.
Cal Corcoran
clayton29@pipeline.com
------------------------------
Date: Thu, 5 Jun 1997 21:42:38 -0700
From: "J.D. Oster" (oster@MAIL.UCR.EDU)
Subject: Re: Gypsum & High SAR in the Coachella Valley
Contact Tom Fairweather, sale representative of Solution Systems with
offices in Visalia California, for details about a gypsum injection machine
sold by this company.
I'm a bit curious about your situation: What is the EC and SAR of the well
water, what is the texture of the surface soil, what is the method of
irrigation, and do you have problems with water infiltration? At 06:37 PM
6/3/97 -0700, you wrote:
)I have a Perlette vineyard in Coachella Valley irrigated with well water
)with a high SAR. I was told by Sam Aslan (local usda soil guy) that I
)need to inject gypsum with my water. Water flow is @ 400 gpm for the 20
)acres. I was also told that there are injectors that can be purchased
)for this purpose (inject dry bulk gypsum into a drip system). Any
)thoughts on design or products??
)
J.D.(Jim) Oster
Soil and Water Specialist and Adjunct Professor
Soil and Environmental Sciences
University of California
Riverside, CA.
FAX: 909 787-5522
P.O Box 1344
Graeagle CA 96103
Telehones
VOICE:
Riverside Office 909 787-5100 Nov 1997
Graeagle Office 916 8360938 May through October 1997
e-mail: Oster@mail.ucr.edu
http://esce.ucr.edu
------------------------------
End of TRICKLE-L Digest - 4 Jun 1997 to 5 Jun 1997
**************************************************
Date: Sat, 07 Jun 1997 00:01:47 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 5 Jun 1997 to 6 Jun 1997
There are 6 messages totalling 488 lines in this issue.
Topics of the day:
1. Few: Plastic mulch use and ET
2. News Items
3. Satelite Controllers
4. Greetings to all/ ? about suppliers
5. Fwd: Irrigation Association class schedule
6. Gypsum & High SAR in the Coachella Valley
----------------------------------------------------------------------
Date: Fri, 6 Jun 1997 15:13:11 -0700
From: Keith Weatherhead (K.Weatherhead@CRANFIELD.AC.UK)
Subject: Re: Few: Plastic mulch use and ET
Sure Craig, you're talking about plastic mulch and drip irrigation in certain parts of your
country, as you say. Your comments apply in many other situations too. But I'm sure (I
hope?) you'll agree that that doesn't necessarily make it wonderful everywhere. All I said
was, "be careful". If it works for you, great, but irrigation is bedevilled by blanket
statements about what works in some climates, or with some application methods,
becoming treated as universal truths. I'm sure your points are valid, particularly for US
arid climates, but many people, including UK irrigators, have different situations. Others
need to be sure the benefits apply in their situation. And to do that, they need to think
about all the possible mechanisms first.
Other comments capitalised below.
Keith
On Thu, 5 Jun 1997 16:35:25 -0400 Craig A. Storlie wrote:
) From: Craig A. Storlie (storlie@AESOP.RUTGERS.EDU)
) Date: Thu, 5 Jun 1997 16:35:25 -0400
) Subject: Re: Few: Plastic mulch use and ET
) To: TRICKLE-L@CRCVMS.UNL.EDU
)
) Keith:
)
) I couldn't help but respond. Plastic mulch and drip irrigation have
) revolutionized vegetable production in certain parts of the country. We
) can grow 2-5 times the produce with half of the water.
)
) Keith Weatherhead wrote:
) )
) ) Be careful, the effect of mulches isn't as simple as just reducing soil evaporation.
) )
) ) 1. All mulches intercept some of the rainfall and overhead irrigation. Plastics are not as
) ) bad as many other mulches, but this partly cancels out the gains.
)
) What is "bad"? Please explain. (AT INTERCEPTING THE RAINFALL AND
STOPPING SOME OF IT REACHING THE PLANT. FOR ORGANIC MULCHES THIS IS A
SIGNIFICANT LOSS IN CLIMATES LIKE THE UK)
) )
) ) 2. The plastic may deflect rainfall or overhead irrigation away from the crop rows.
)
) This is an advantage in the humid east where soil-borne diseases are a
) major problem. We dome our beds to move that off the bed and into the
) ally. (WE TRY AND KEEP OUR RAINFALL)
) )
) ) 3. The temperature and humidity under the plastic are increased, which will change
crop
) ) transpiration rates. The plastic and any condensation also reduce sunlight.
)
) Soil warming grows plants faster, increases earliness - another key
) advantage in northern climates. Warm soil increases transpiration? (WARM AIR?)
) Indirectly, I suppose.
) )
) ) 4. Condensation on the plastic, dripping back onto the crop, can be highly
non-uniform.
)
) My experience is that condensation in pretty uniform. In either case,
) the amount of water we are talking about is "small". At least it stays
) in the bed as opposed to evaporation to the atmosphere.
) )
) ) 5. Most of the savings on soil evaporation are in the early part of the season, when
) ) perhaps water availability is not so critical.
)
) Yes, but transplant establishment is another important factor to
) consider. Small root systems need lottsa help - mulch makes the tough
) goin' a little easier on those little guys.
) )
) ) 6. The higher temperatures could accelerate crop development.
)
) Yes, see #3 above.
) )
) ) Finding numbers to put on these effects is difficult.
)
) Actually, lots of mulch research has been done. YES, BUT ITS STILL DIFFICULT
TO PREDICT HOW MUCH WATER IT WILL SAVE IN A WET CLIMATE.
)
)
) Craig Storlie
) Rutgers University
Keith Weatherhead
Cranfield University, School of Agriculture, Food and Environment,
Silsoe, Bedford, MK45 4DT, UK.
Telephone: +44 (0)1525 863336 (work)
Fax: +44 (0)1525 863300, or +44 (0)1525 863001
E-mail: k.weatherhead@cranfield.ac.uk
WWW: http://www.cranfield.ac.uk/safe/people/kweather.htm
------------------------------
Date: Fri, 6 Jun 1997 09:27:32 -0500
From: "Terry A. Howell" (tahowell@AG.GOV)
Subject: News Items
6/6/97
Trickle-L and Irrigation-L:
You may be interested in these PBS (Public Broadcasting Station) shows (the
release came from another discussion group and I haven't seen this in
Trickle-L or Irrigation-L). I doubt they will put irrigation in a
"favorable light," but you still might want to see them anyway.
On another matter, our WEB site has moved to this new address:
http://www.cprl.ars.usda.gov
Our old address will still work and simply divert to this one. But please
update any links to our WEB page (if you have one) and update your
Bookmarks. I will send a future announcement (soon I hope) for a WEB
address where you can get access to our daily ET (water use) faxes and
hourly data files for the Northern Texas High Plains (2+ million irrigated
acres; 26 counties in the Texas Panhandle).
Terry Howell
Enviro-News Subscribers--
For additional information on this series and the issues that it
covers, see http://www.pbs.org/kteh/cadillacdesert/
--Joe
---------- Forwarded message ----------
Date: Wed, 04 Jun 1997 12:19:28 -0700
Forwarded from:
http://www.pbs.org/whatson/1997/06/press/cdes__000101.html
)
) CADILLAC DESERT
)
) CADILLAC DESERT chronicles the epic struggle for water in
) the modern American West and its legacy of fruitful
) abundance and profound risk at home and abroad. The new
) series airs on PBS Tuesdays, June 24-July 15, 1997, 9:00
) p.m. ET (check local listings). The first three programs,
) based on Marc Reisner's groundbreaking book, CADILLAC
) DESERT, are tales of heroic determination, astounding
) engineering feats, political machinations, and economic and
) ecological triumphs and disasters. The final program, based
) on Sandra Postel's book, Last Oasis, explores the
) ramifications of the global export of American land
) reclamation technology to developing countries. Academy
) Award-nominee Alfre Woodard narrates.
)
) * "Mulholland's Dream" (6/24, 90 minutes) is the story of
) how the people of Los Angeles sent William Mulholland
) to look for water and how he found it for them. Evoking
) real-life visionaries, scoundrels and dark intrigues
) behind Los Angeles' search for water in the 1974
) fictional movie Chinatown, the program weaves past and
) present together to illustrate water's role in the
) history of Los Angeles, as well as the city's
) challenges for the future. Featured contributors
) include, Catherine Mulholland, William Mulholland's
) granddaughter; Robert Towne, screenwriter of Chinatown;
) Marc Reisner, author of CADILLAC DESERT; Congressman
) George Miller, D-CA; Kevin Starr, California historian
) and author; and others.
)
) * "An American Nile" (7/1, 1 hour) charts the dramatic
) transformation of the Colorado River from a wild desert
) waterway with a mind of its own, into the most
) controlled, litigated, domesticated, regulated and
) over-allocated river in the history of the world. From
) the heroic construction of the Hoover Dam during the
) Great Depression to the bitter political and
) environmental battles about the potential damming of
) the Grand Canyon, this program illustrates how the
) Colorado became so impounded and diverted that by 1969
) it no longer reached the ocean. Featured contributors
) include, Patricia Mulroy, general manager of the Las
) Vegas Valley Water District; former U.S. Senator Barry
) Goldwater; Floyd Dominy, commissioner of reclamation
) from 1959 to 1969; David Brower, former executive
) director of the Sierra Club; Blaine Hamann, manager of
) Hoover Dam; and others.
)
) * "The Mercy of Nature" (7/8, 1 hour) traces the fierce
) political and environmental battles that raged around
) the transformation of California's Central Valley from
) semiarid desert into the most productive and
) environmentally-altered agricultural region in global
) history. Featured contributors include, Daniel Beard,
) commissioner of reclamation from 1993 to 1995; Kathleen
) Brown, California State Treasurer; Jason Peltier,
) manager of the Central Valley Project Water
) Association; and others.
)
) * "Last Oasis" (7/15, 1 hour) opens with the story of how
) America's large dams became examples for water projects
) abroad, particularly in developing countries. This
) final episode travels to India and China, where dam
) building continues in full force, and to Mexico, the
) Middle East and back to the American West to explore
) how, in the face of rising water needs, conservation
) may be humanity's "last oasis." Featured contributors
) include, Sandra Postel, author of Last Oasis and
) director of the Global Water Policy Project; professor
) Charles Wilkinson of the Natural Resources Law Center,
) University of Colorado School of Law; Marc Reisner; and
) others.
)
) Day & time: check with your local PBS station
)
) [Credits]
)
) Underwriters: Ford Foundation; William and Flora Hewlett
) Foundation; The John D. and Catherine T. MacArthur
) Foundation; Columbia TriStar International Television; Gap,
) Inc.; Brita; National Fish and Wildlife Foundation; Michael
) J. Connell Foundation; Bullitt Foundation; David and Lucille
) Packard Foundation; California Council for the Humanities;
) Ambassador Bill and Jean Lane Fund; Compton Foundation,
) Inc.; Wallace Alexander Gerbode Foundation; Mary A. Crocker
) Trust; Pacific Mountain Network; Wyoming Council for the
) Humanities; Apple Computers; Andrew Norman Foundation;
) Jenifer Altman Foundation; Bert Fingerhut/Caroline Hicks
) Family Fund; Public Television Viewers; PBS and Corporation
) for Public Broadcasting
)
) Producers: Trans Pacific Television and KTEH San Jose
)
) Presenters: KTEH San Jose and KCET Los Angeles
)
) Executive producer: Jonathan Taplin, Sandra Itkoff and Danny
) L. McGuire, KTEH
)
) Producer/director/writer: Jon Else ("Mulholland's Dream,"
) "An American Nile" and "The Mercy of Nature")
)
) Producer/director: Linda Harrar ("Last Oasis")
)
) Narrator: Alfre Woodard
)
) Format: CC STEREO
)
http://www.pbs.org/whatson/1997/06/press/cdes__000101.html
*********************************************************************
* Terry A. Howell, Ph.D., P.E. (806) 356-5746 (voice) *
* USDA-ARS (806) 356-5750 (fax) *
* P.O. Drawer 10 tahowell@ag.gov (e-mail) *
* 2300 Experiment Station Rd. (shipping) *
* Bushland, TX 79012 http://www.cprl.ars.usda.gov/ (Internet) *
* ........ Make every drop count! Whose water is it? ....... *
*********************************************************************
------------------------------
Date: Fri, 6 Jun 1997 09:29:17 -0700
From: Graham Hutchinson (hutch@BMI.NET)
Subject: Satelite Controllers
Hi Cal
Thanks for your suggestions about the controllers. Here are some specifics
on the situation.
There will be about 6 pumps (in different locations). Each pump will
deliver water to a set of valves and each pump will have a fertigation
unit. AC power is readily available. The office buildings at the site
will be about 1/2 a mile or so from the pumps and valves. The client would
like to be able to control the irrigation system from the office and be
able to record the history of irrigation and fertigation.
I envisaged that a satelite unit would be at each pump. The connection
from each satelite to the office could be wire but they would prefer radio
or other types of communication. The land is flat, and there will be line
of site from the office to the pump stations. The site is not near a
residential area but a city is about 20 miles away.
Many thanks
Graham Hutchinson
------------------------------
Date: Fri, 6 Jun 1997 12:59:38 +0000
From: "Steve D. Hopper" (HOPPERSD@CONRAD.APPSTATE.EDU)
Subject: Greetings to all/ ? about suppliers
Greetings to everyone on this listserve from a new registrant.
My father has a small farm in south western North Carolina.
We are wanting to try drip irrigation on a few rows of sweet
pototoes this year but have not found a source of materials to
do so.
Could anyone point me to a mail-order supplier, preferably one
with a web site, so that we can get the necessary supplies and
materials to do this? Also, does anyone have any experience
using drip irrigation on this crop? I have asked at lots of
farm and garden suppliers but have found no one who even knows
what I'm talking about let alone have anything in stock.
Many thanks to anyone who can point me in the right direction.
You can direct email to hoppersd@appstate.edu . I try
to do 'personal' stuff only during breaks or lunch time and
sometimes nights and weekends at home. later. sdh.
Steve D. Hopper
Boone NC
Rutherfordton NC
hoppersd@appstate.edu
------------------------------
Date: Fri, 6 Jun 1997 19:53:42 -0400
From: Tim1Utah@AOL.COM
Subject: Fwd: Irrigation Association class schedule
---------------------
Forwarded message:
From: lori@irrigation.org (Lori Brown)
To: Tim1Utah@aol.com (Tim)
Date: 97-06-06 14:48:11 EDT
THE IRRIGATION ASSOCIATION
SCHEDULE OF EDUCATION COURSES
CALIFORNIA
SAN DIEGO
ELECTRICAL TROUBLESHOOTING - JUNE 24, 1997
CAL POLY POMONA
ELECTRICAL TROUBLESHOOTING - JUNE 25, 1997
OAKLAND/CONCORD
ELECTRICAL TROUBLESHOOTING - JUNE 26, 1997
SAN JOSE/SUNNYVALE
ELECTRICAL TROUBLESHOOTING - JUNE 27, 1997
SPONSORED BY THE CALIFORNIA LANDSCAPE CONTRACTORS ASSOCIATION
WASHINGTON
BELLEVUE
LANDSCAPE IRRIGATION AUDITOR - JUNE 30-JULY 1, 1997
SPONSORED BY: WASHINGTON CHAPTER OF THE IRRIGATION ASSOCIATION
TEXAS
AMARILLO
ELECTRICAL TROUBLESHOOTING - JULY 21, 1997
DESIGN HYDRAULICS
ABILENE
ELECTRICAL TROUBLESHOOTING - JULY 22, 1997
DESIGN HYDRAULICS
DENTON
ELECTRICAL TROUBLESHOOTING - JULY 23, 1997
DESIGN HYDRAULICS
McALLEN
DRIP IN THE LANDSCAPE - JULY 25, 1997
SPONSORED BY:
TEXAS TURF IRRIGATION ASSOCIATION
CO-SPONSORS:
RAINBIRD, WESTERN INDUSTRIAL, TORO N.S.N., DENTEX SUPPLY, PIPE N HEADS,
AMC INDUSTRIES, Z-WATER WORKS
NEBRASKA
OMAHA
ELECTRICAL TROUBLESHOOTING - JULY 24, 1997
SPONSORED BY THE NEBRASKA TURF IRRIGATION ASSOCIATION
HOSTED BY BH&L TURF IRRIGATION SUPPLY
KANSAS
HUTCHINSON
ELECTRICAL TROUBLESHOOTING - JULY 25, 1997
SPONSORED BY THE KANSAS IRRIGATION ASSOCIATION
CO-SPONSORED BY THE KANSAS ASSOCIATION OF NURSERYMEN
HOSTED BY BH&L TURF IRRIGATION SUPPLY
SOUTH CAROLINA
MT. PLEASANT
LANDSCAPE IRRIGATION AUDITOR - JULY 29-JULY 30, 1997
SPONSORED BY: CAROLINAS IRRIGATION ASSOCIATION
HOSTED BY: MT. PLEASANT WATERWORKS COMMISSION
TEXAS
SAN ANTONIO
DRIP IN THE LANDSCAPE - AUGUST 8, 1997
SPONSORED BY: SAN ANTONIO IRRIGATION ASSOCIATION
KANSAS
WICHITA
CERTIFIED IRRIGATION CONTRACTOR - SEPTEMBER 8-9, 1997
LANDSCAPE IRRIGATION DESIGN - DECEMBER 8-9, 1997
SPONSORED BY THE KANSAS IRRIGATION ASSOCIATION
HOSTED BY THE CITY OF WICHITA
ILLINOIS
HOFFMAN ESTATES
LANDSCAPE IRRIGATION AUDITOR - SEPTEMBER 9-10, 1997
SPONSORED BY THE ILLIONIS TURF IRRIGATION ASSOCIATION
HOSTED BY SEARS WORLD HEADQUARTERS
NEW MEXICO
RUDISIO
LANDSCAPE IRRIGATION AUDITOR - SEPTEMBER 15-16, 1997
SPONSORED BY THE NEW MEXICO IRRIGATION ASSOCIATION
HOSTED BY RMSAWWWA/RMWEA
CALIFORNIA
CORONA
INSTALLATION SUMMER CAMP - OCTOBER 6-10, 1997
SPONSORED BY CALIFORNIAL LANDSCAPE CONTRACTORS ASSOCIATION
RIVERSIDE CORONA CONSERVATION DISTRICT
HOSTED BY CITY OF CORONA
THE IRRIGATION ASSOCIATION RESERVES THE RIGHT TO CANCEL ANY OR ALL
CLASSES AS NECESSARY.
*FOR GENERAL INFORMATION CONCERNING REGISTRATION FORMS AND INFORMATION
CONTACT:
LORI M. BROWN
EDUCATION MANAGER
PHONE: (703) 573-3551 FAX: (703) 573-1913
ADDITIONAL SITES AND DATES WILL BE FORTHCOMING
------------------------------
Date: Fri, 6 Jun 1997 19:46:02 -0400
From: "Dr. Tom Trout" (ttrout@ASRR.ARSUSDA.GOV)
Subject: Re: Gypsum & High SAR in the Coachella Valley
Gypsum is commonly injected into irrigation water in the Central Valley to
improve infiltration. However, I believe that the goal is for the gypsum to
be dissolved before it enters drip systems. Several companies make gypsum
applicators that create a gypsum "slurry" that dissolve quickly. There are
several companies supplying machines and materials including Soil Solutions
(Visalia, CA: 209-651-4100), Ag Pro (Western Minerals, St George, UT:
888-882-4776), and Turbo Mix (Fresno Valves, Selma CA: 209-967-0177).
)I have a Perlette vineyard in Coachella Valley irrigated with well water
)with a high SAR. I was told by Sam Aslan (local usda soil guy) that I
)need to inject gypsum with my water. Water flow is @ 400 gpm for the 20
)acres. I was also told that there are injectors that can be purchased
)for this purpose (inject dry bulk gypsum into a drip system). Any
)thoughts on design or products??
)
)
*****************************************************************
Dr. Tom Trout
USDA/ARS/Water Management Research Laboratory
2021, S. Peach Ave.
Fresno CA, 93727-5951
Phone: (209)453-3101 E-mail: TTrout@asrr.arsusda.gov
Fax: (209)453-3122 WWW: http://asset.arsusda.gov/Tom.html
*****************************************************************
------------------------------
End of TRICKLE-L Digest - 5 Jun 1997 to 6 Jun 1997
**************************************************
Date: Sun, 08 Jun 1997 00:01:28 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 6 Jun 1997 to 7 Jun 1997
There is one message totalling 15 lines in this issue.
Topics of the day:
1. Aeration of water
----------------------------------------------------------------------
Date: Sat, 7 Jun 1997 19:43:00 +0000
From: MarekMalujlo (marakesh@HARARE.IAFRICA.COM)
Subject: Re: Aeration of water
Aeration of water in order to convert ferrous iron to ferric iron was discussed quite a long time ago.
I was wondering if anyone has tried placing a venturri across a pump ie across the discharge and suction of a pump and simply used the venturri to suck air into the system.
Obviously this can only work if there is a long mainline from pump to filters.
Is there any detrimental affect on the pump? Will it work?
Thanks Marek Malujlo
------------------------------
End of TRICKLE-L Digest - 6 Jun 1997 to 7 Jun 1997
**************************************************
Date: Tue, 10 Jun 1997 00:01:05 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 7 Jun 1997 to 9 Jun 1997
There are 4 messages totalling 172 lines in this issue.
Topics of the day:
1. Greetings to all/ ? about suppliers
2. Drip Sources/Sweet Potato
3. Aeration of water
4. Stand Pipe
----------------------------------------------------------------------
Date: Mon, 9 Jun 1997 09:03:53 -0500
From: "W. Bryan Smith" (wsmth@CLEMSON.EDU)
Subject: Re: Greetings to all/ ? about suppliers
Steve,
Try the following for your drip supplies (in no particular order):
W.P. Law, Inc., Greer, SC (864) 879-1045
BB Hobbs Co., Darlington, SC (803) 395-2120
Gra-Mac Distributing, Mocksville, NC (919) 998-3232
Johnson & Company, Inc., Advance, NC (919) 998-5621
Mark Reddick, Williamston, NC (919) 792-1613
(fumigants and bedders, but also has some drip)
Hope this helps - let me know if I can help further.
Bryan
=|===|===|===|===|===|===|===|===|===|===|=
W. Bryan Smith
Area Extension Agent - Irrigation / Water Quality
Clemson Extension Service
P.O. Box 160, Newberry, South Carolina 29108 USA
Office: 803 276-1091 FAX: 803 276-1095
Internet: wsmth@clemson.edu
=|===|===|===|===|===|===|===|===|===|===|=
All opinions are my own and not reflective of the
policies of Clemson University or the Cooperative
Extension Service.
------------------------------
Date: Mon, 9 Jun 1997 12:00:08 +0000
From: "Steve D. Hopper" (HOPPERSD@CONRAD.APPSTATE.EDU)
Subject: Drip Sources/Sweet Potato
Many thanks to those who responded to my posting last week
about suppliers in NC area and about drip on sweet potatoes.
I have received all the information I will be needing and
I truly appreciate everyone who responded. I hope to get
everything I need to start my experiment within the next
two week. Thanks again! sdh.
Steve D. Hopper, Computer & Management Services
Appalachian State University
Boone, NC email= hoppersd@appstate.edu
------------------------------
Date: Mon, 9 Jun 1997 17:44:12 -0700
From: Marty Grogan (ges@OWT.COM)
Subject: Re: Aeration of water
)Aeration of water in order to convert ferrous iron to ferric iron was
discussed quite a long time ago.
)I was wondering if anyone has tried placing a venturri across a pump ie
across the discharge and suction of a pump and simply used the venturri to
suck air into the system.
)Obviously this can only work if there is a long mainline from pump to filters.
)Is there any detrimental affect on the pump? Will it work?
)
)Thanks Marek Malujlo
)
)
Water pumps do not pump air well at all and may in fact be damaged by
introduction of air if sufficient to cause cavitation.
M.G.
Marty Grogan, BSAE, MSEE
Owner, Grogan Engineering Services
President, HydroTek, Inc.
1320 Adair Drive
Richland, WA 99352
(509)627-3083 (voice and FAX)
ges@oneworld.owt.com
Specializing in Electronics Based Products and Services for Precision
Agriculture: Research, Instrumentation, Data Systems, Telemetry and Remote
Sensing.
GES--The technology buckstopper.
(Detailed Resume Available: http://www.owt.com/users/ges/resume.html)
------------------------------
Date: Mon, 9 Jun 1997 17:44:14 -0700
From: Marty Grogan (ges@OWT.COM)
Subject: Re: Stand Pipe
)I want to establish a relief for overpressure by erecting a
)stand pipe using two inch PVC. Can someone give me the formula for
)how tall a pipe I need for certain pressure relief (overflow)?
)
)Rick
)
)
Rick:
I can't be sure from your posting, but if you are referring to something
like "water hammer," the requirements are much different than just
accommodating the volumetric constraints of the piping.
Presumably, you have had problems with pipes rupturing or you would not be
asking the question.
Rupture generally can not be caused by simple pumping because the burst
strength of pipes exceeds the pump cabability by several multiples.
If you want to cure "hammer" problems, you must look to regulating the rate
of closure of valves, volumetric momentum and sealed, pneumatic
standpipes(dynamic dampers).
The sizing of hydraulic dampers depends on many factors: the momentum of
the fluid, diameter of the pipes, pipe topology, valve location, valve
coordination, valve closure rates and flow velocity. Even the roughness of
the inside surface of the pipe, its age and the temperature can become involved.
Depending on the severity of the situation, small standpipes located on
either side of each valve might solve the problem.
Since the damping effect of the standpipe is related to its volume, using a
larger diameter pipe for the standpipe will be better for a given standpipe
length.
For rough calculation, determine how much head would be generated if the
flowing pipe stream were pointed vertically upward suddenly at the valve
point. (Potential energy = Kinetic energy) Then size the standpipe so that
the resulting vertical fluid column could be contained. This size would
insure that the pressure in the standpipe would not exceed reasonable
limits. Since the standpipe will initially be filled with air, pneumatics
as well as hydraulics become involved making this calculation somewhat
conservative. (By the way, a sealed standpipe for this application which is
not initially filled with air doesn't work at all--they must be installed
with care.)
Commercial dampers are no doubt available which have design guidelines for
their application.
If I guessed incorrectly about your particular situation, please give it
another shot.
Marty Grogan, BSAE, MSEE
Owner, Grogan Engineering Services
President, HydroTek, Inc.
1320 Adair Drive
Richland, WA 99352
(509)627-3083 (voice and FAX)
ges@oneworld.owt.com
Specializing in Electronics Based Products and Services for Precision
Agriculture: Research, Instrumentation, Data Systems, Telemetry and Remote
Sensing.
GES--The technology buckstopper.
(Detailed Resume Available: http://www.owt.com/users/ges/resume.html)
------------------------------
End of TRICKLE-L Digest - 7 Jun 1997 to 9 Jun 1997
**************************************************
Date: Wed, 11 Jun 1997 00:01:21 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 9 Jun 1997 to 10 Jun 1997
There are 4 messages totalling 138 lines in this issue.
Topics of the day:
1. Melaluca Irrigation (2)
2. Melaluca Irrigation (Tea Tree)
3. Introduction to Trickle-L
----------------------------------------------------------------------
Date: Tue, 10 Jun 1997 22:07:03 +0000
From: Brian Peadon (irrigate@LISP.COM.AU)
Subject: Melaluca Irrigation
Greetings,
Does anybody have any experience irrigating melaluca's. (Tea Tree)
I am interested in both the water usage of the plant and the mode of
irrigation.
Melaluca's have a very dense, woody, matted root system that on first
glance would appear to make it unsuitable for SDI, which is the
preferred mode.
Your comments please! Any information gratefully received.
Regards,
Brian J Peadon
------------------------------
Date: Tue, 10 Jun 1997 12:01:29 -0500
From: Freddie Lamm (FLamm@OZNET.KSU.EDU)
Subject: Re: Melaluca Irrigation (Tea Tree)
Brain Peadon wrote:
Does anybody have any experience irrigating melaluca's. (Tea Tree)
I am interested in both the water usage of the plant and the mode of
irrigation.
Freddie Lamm replied:
There is a short paper in Proceedings of the 5th International
Microirrigation Congress, April 2-6, 1995 Orlando Florida, published
by ASAE, 2950 Niles Road, St Joseph MI, 49085, hq@asae.org.
entitled Microirrigation Effect on the Growth and Water Use of Tea
(Camellia sinensis) by A. Anandacoomaraswamy on pages 745-749.
I believe they are still charging US$59.00 for the Proceedings. AND
NO, I don't get any royalties as Proceedings Chair.
Freddie
*
-------------------------------------------------------------------
Freddie Lamm *
Research Agricultural Engineer *** o
KSU Northwest Research-Extension Center ***** /|\
105 Experiment Farm Road *******\\
Colby, Kansas 67701-1697 *********
Ph. 913-462-6281 ***********
FAX 913-462-2315 *************
Email:flamm@oznet.ksu.edu It's all downhill from here.
------ THERE'S NO DOMAIN LIKE OZ, THERE'S NO DOMAIN LIKE OZ. ------
------------------------------
Date: Tue, 10 Jun 1997 11:21:36 -0700
From: Ali Asghar Ghaemi (ghaemi@UNIXG.UBC.CA)
Subject: Re: Introduction to Trickle-L
June 10, 1997
Dear friends:
As a new member I like to introduce myself briefly. I am very pleased to
start my communication with the discussion list Trickle-L. My name is Ali
Ghaemi. I have graduated (M.Sc)from Biological and Irrigation Engineering
Department at the Utah State University (USA) in 1987. I have taught
different irrigation courses in Irrigation Engineering department at the
Shiraz university in Iran since 1987 to 1994.I have much experience in
furrow and flood irrigation, shifted to drip and sprinkler irrigation for
several years. In addition, have some experience in drainage and lot
experience in surveying (land surveying, topographic surveying, land
leveling, land grading, and route surveying). Now, I am a third year Ph.D.
student at the University of British Columbia, Vancouver, Canada. My
research work is related to hydraulics of microirrigation system
(surface). The microirrigation system have installed at the field in a
research scale area south-west part of the university. Pressure
compensating emitters are used for this research. Since this study has
focused on hydraulics of microirrigation system there is no any specific
crop involved in my research. One of the most important problem in
microirrigation system is the clogging(emitter clogging)specially in arid
area and the area using well water to irrigate the crops.
Although,Vancouver(Canada) with average annual precipitation of 1200 mm
has adequate water for irrigation, but this system is widely used in
Alberta and some parts such as Okanagan Valley in Vancouver.
We are short of water in Iran( my original country). Iran is an arid to
semi-arid area with the average annual precipitation of 250 mm. I am
really interested to work in microirrigation which is one of the more
efficient and advanced system. I have found the Trickle-L mailing list via
Irrigation-L. Hope,through this discussion list I will be able to discuss
with the members and improve my knowledge. Thank you all for sharing
knowledge.
Sincerely
Ali.Ghaemi
The University of British Columbia
Department of Bio-Resource Engineering
2357 Main Mall
Vancouver, B.C., Canada V6T 1Z4
Tel: (604)822-4507
Fax: (604)822-5407
e-mail ghaemi@unixg.ubc.ca
------------------------------
Date: Tue, 10 Jun 1997 17:14:08 -0700
From: Rodney Ruskin (geoflow1@SLIP.NET)
Subject: Re: Melaluca Irrigation
At 10:07 PM 6/10/97 +0000, Brian Peadon wrote:
)Melaluca's have a very dense, woody, matted root system that on first
)glance would appear to make it unsuitable for SDI, which is the
)preferred mode.
Reply: Why does this make them unsuitable for SDI?
I have a row of 8 New Zealand tea bushes in an ornamental row in my garden
with SDI with very strong growth. I do not monitor water use because it is
just part of the whole landscape irrigation sytem.
Rodney Ruskin
geoflow1@slip.net
------------------------------
End of TRICKLE-L Digest - 9 Jun 1997 to 10 Jun 1997
***************************************************
Date: Thu, 12 Jun 1997 00:01:52 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 10 Jun 1997 to 11 Jun 1997
There are 2 messages totalling 93 lines in this issue.
Topics of the day:
1. Stand Pipe
2. Melaluca Irrigation
----------------------------------------------------------------------
Date: Wed, 11 Jun 1997 10:09:33 -0600
From: Rick Simpson (bcsl@POBOX.COM)
Subject: Re: Stand Pipe
Marty,
Thanks so much for your response.
) )I want to establish a relief for overpressure by erecting a
) )stand pipe using two inch PVC. Can someone give me the formula for
) )how tall a pipe I need for certain pressure relief (overflow)?
) )
)
) I can't be sure from your posting, but if you are referring to
) something like "water hammer," the requirements are much different
) than just accommodating the volumetric constraints of the piping.
No, actually I was looking into a stand pipe to lesson the risk of
one of my workers would close a value before opening another and blow
out more pipe.
However, I really appreciated the information about water hammer
and learned something I did not know.
Regards,
Rick
BANANA BANK GROVES
at Banana Bank Ranch
Box 180 - 2 Unity Blvd. Belmopan, BELIZE Central America
Tel-Fax:501-82-3505 EMail:bcsl@pobox.com
------------------------------
Date: Thu, 12 Jun 1997 07:00:48 +1000
From: Hortech Services Pty Ltd (hortech@ATS.COM.AU)
Subject: Re: Melaluca Irrigation
At 22:07 10/06/97 +0000, you wrote:
)Greetings,
)
)Does anybody have any experience irrigating melaluca's. (Tea Tree)
)
)I am interested in both the water usage of the plant and the mode of
)irrigation.
)
)Melaluca's have a very dense, woody, matted root system that on first
)glance would appear to make it unsuitable for SDI, which is the
)preferred mode.
)
)Your comments please! Any information gratefully received.
)Regards,
)
)Brian J Peadon
)
)
Brian,
You can contact Graeme Robertson of NSW Ag at Wollongbar.+61 66 261 353
He presently has an EnviroSCAN in Tea Tree at the Wollongabr Research Farm.
Most extraction is at 10-20 cm in the Red Kransozem
Also I have a system installed on the river flats near the Tweed River.
Most extraction is in 10-40 cm in the loam over laying a sand.
As to whether SDI will work. How deep are you going to go, and on what soil.
If a light sand, I feel most water would go where it is not required.
Regards
Peter Broomhall
Horticulural Consultant
Hortech Services Pty Ltd
a.c.n. 060 406 957
P.O. Box 370
Kallangur QLD 4503
Australia
P: +61 418 708 573
F: +61 7 3886 0389
hortech@ats.com.au
------------------------------
End of TRICKLE-L Digest - 10 Jun 1997 to 11 Jun 1997
****************************************************
Date: Sat, 14 Jun 1997 00:02:00 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 11 Jun 1997 to 13 Jun 1997
There are 2 messages totalling 77 lines in this issue.
Topics of the day:
1. Thank you and another question
2. Online articles and MIF update
----------------------------------------------------------------------
Date: Fri, 13 Jun 1997 15:58:50 -0700
From: Jochen Eberhard (Jochen.Eberhard@T-ONLINE.DE)
Subject: Thank you and another question
Hi everybody,
thanks to everybody how responed to my wireworm-problem and my
SDI-tomatoes. It seems like we killed the wireworms with the applied
chemicals.
Now there is another *problem*. We want to establish SDI for 6 ha on our
vegetable research farm. Do not smile, this is relatively large for
german conditions. The idea is to leave the tape in the soil for several
years. Dr. Maync, the boss of this farm, wants to visit a place where
SDI is used for intensive vegetable production in a professional manner,
preferable in Europe but he also would go to California if nessesary.
So any addresses or hints would be of great help.
Thanks
Jochen
--
_____________________________________________________________
| Jochen Eberhard * * |
| SLFA Versuchsbetriebe ( \ / ) |
| Queckbrunnerhof \ / |
| Dannstadter Str. 91 --- |
| 67105 Schifferstadt (o|o) |
| Germany ( ~~~ ) |
| ( ) |
| Tel: 0049 - 6235 - 2672 ( ) |
| Fax: - - 82741 ( ooO Ooo ) |
| email: Jochen.Eberhard@t-online.de |
|_____________________________________________________________|
------------------------------
Date: Fri, 13 Jun 1997 09:08:15 -0700
From: Richard Mead (rmead@AGRILINK-INT.COM)
Subject: Online articles and MIF update
Trickle-L gang,
For those of you who surf the web, there are some online drip related
articles that I have neglected to announce from the AIP Green Net
publication service. Both are from the online version of "Landscape and
Irrigation" publication. The specific articles are:
- Clog Prevention In Drip Systems
http://www.aip.com/green/pub/li/html/597drip.html
- Micro-Feeding With Fertigation
http://www.aip.com/green/pub/li/html/597fertigatn.html
The second article adds more information to what we discussed several weeks
ago concerning fertigation, yet from a landscape perspective. However, I
must warn you the both URLs at the bottom of this article could not be
accessed, at least when I clicked on them.
As an update on the Microirrigation Forum web site, I am in the process in
my off hours of setting up a specific domain for the site. I'm also
re-standardizing all the archived files so that they all appear easier to
read and have the same uniform background. All this button pushing will
take time, but in the very near future I will announce the newly created
website. My apologies to any of you who have tried to access the 'old' web
site (www.cybergate.com/~rmead)=85don't even bother, it's no longer there=
:-(
Richard Mead
Trickle-L owner/manager
------------------------------
End of TRICKLE-L Digest - 11 Jun 1997 to 13 Jun 1997
****************************************************
Date: Tue, 17 Jun 1997 00:01:06 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 13 Jun 1997 to 16 Jun 1997
There is one message totalling 39 lines in this issue.
Topics of the day:
1. Aeration of water
----------------------------------------------------------------------
Date: Mon, 16 Jun 1997 11:06:51 -0500
From: Donald Pitts (djp@ICON.IMOK.UFL.EDU)
Subject: Re: Aeration of water
Marek,
We tried injection of air with a high volume compressor to
precipitate iron. We followed injection with media filtration to remove the
iron. We were already injecting chlorine, and the addition of air did not
improve our iron removal rate.
Don Pitts
At 07:43 PM 6/7/97 +0000, you wrote:
)Aeration of water in order to convert ferrous iron to ferric iron was
discussed quite a long time ago.
)I was wondering if anyone has tried placing a venturri across a pump ie
across the discharge and suction of a pump and simply used the venturri to
suck air into the system.
)Obviously this can only work if there is a long mainline from pump to filters.
)Is there any detrimental affect on the pump? Will it work?
)
)Thanks Marek Malujlo
)
--------------------------------------------------------------------
David W. Parker, Senior Engineering Technician
University of Florida, SWFREC
P.O. Box 5127, Immokalee, Fl 34143-5002
941-657-5221(W) 5224(fax) 941-693-2379(H)
Email: dwp@gnv.ifas.ufl.edu or dwp@icon.imok.ufl.edu
Homepage http://www.ufl.edu
--------------------------------------------------------------------
------------------------------
End of TRICKLE-L Digest - 13 Jun 1997 to 16 Jun 1997
****************************************************
Subject: TRICKLE-L Digest - 16 Jun 1997 to 17 Jun 1997
There is one message totalling 27 lines in this issue.
Topics of the day:
1. mail Mr.Ali Ghaemi
----------------------------------------------------------------------
Date: Tue, 17 Jun 1997 08:43:32 -0500
From: alekperc@BGUMAIL.BGU.AC.IL
Subject: Re: mail Mr.Ali Ghaemi
Dear Friend
I would like to familiar you with two references:
-Benami, A., A. Ofen 1993. Irrigation engineering. Ram offset, Ltd.,
Tel-Aviv, Israel. pp.257.
-Irrigation of agricultural crops 1990. / B.A.Stewart and D.R. Nielsen,
coeditors. Agronomy; no. 30. pp.1218.
I have question to you, Mr.Ali Ghaemi, in irrigation scheduling you have
filters system?
Emitter clogging depend to filters system and the filter's quality.
Microirrigation need the filters system also in Canada, in Iran , and in
Israel.
My best regards
Dr. Chingiz K.Alekperov
Agrobiology Center Insitute for Desert Research
Sede-Boqer Campus,84993 Israel
Fax ++972-7-6596742
------------------------------
End of TRICKLE-L Digest - 16 Jun 1997 to 17 Jun 1997
****************************************************
Subject: TRICKLE-L Digest - 17 Jun 1997 to 19 Jun 1997
There are 3 messages totalling 74 lines in this issue.
Topics of the day:
1. Gypsum & High SAR in the Coachella Valley
2. (No subject given)
3. WANTED: LATIN AMERICA SALES MANAGER
----------------------------------------------------------------------
Date: Mon, 19 May 1997 13:35:30 -0700
From: "Alan S. Wicks" (awicks@TELEVAR.COM)
Subject: Re: Gypsum & High SAR in the Coachella Valley
Greetings Robby,
My experience with gypsum injectors in La Costa de Hermosillo was with
the Soil Solutions injector. The machine actually makes a slurry that
is injected into the drip system. Gypsum is soluble to about 28
mEquivelants Calcium. Usually I only needed to increase the calcium
about 1 to 1.5 milliEquivelants to improve penetration and to remove
some of the sodium. So, the gypsum is in true solution after
injection.
If sodium is a problem do not add a slug of calcium and then not
irrigate for awhile. Addition of calcium will displace the sodium into
the soil solution. If not leached with additional water the sodium
concentration in the soil solution will remain high and the plant will
take it up. I have seen a vineyard where this happened and the plants
nearly died when the sodium levels in the leaves hit 5000 ppm. They
were less than 1000 before gypsum application. However, with proper
leaching sodium should not be a problem.
If you have any other questions, just drop me a note.
Alan S. Wicks
------------------------------
Date: Thu, 19 Jun 1997 21:17:03 -0200
From: Luiz Lima (luizlima@METALINK.COM.BR)
Subject: (No subject given)
Dear Rubens,
The literature I mentioned is:
TUBOS DE POLIETILENO E POLIPROPILENO
Caracteristicas e Dimensionamento - Vol. 1
Jose Roberto B. Danieletto
Medialdea Editora Ltda (0115427563)
Primeira Ed. 1990
I will send you other references later.
Best regards,
Luiz Lima / UFLA
------------------------------
Date: Thu, 19 Jun 1997 19:29:23 -0700
From: mmoynihan (mmoynihan@PRODIGY.NET)
Subject: WANTED: LATIN AMERICA SALES MANAGER
LATIN AMERICA SALES MANAGER sought by growing drip/microirrigation
manufacturer in Southern California. Responsibilities will include
sales management and marketing for Latin America with potential for
broadening towards overall international sales management. Candidate
must speak Spanish and will help develop Spanish literature for the
company. Candidate must also be able to travel as required. Interested
parties should respond with resume if possible to mmoynihan@prodigy.net
------------------------------
End of TRICKLE-L Digest - 17 Jun 1997 to 19 Jun 1997
****************************************************
Date: Thu, 26 Jun 1997 00:03:09 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 19 Jun 1997 to 25 Jun 1997
There are 2 messages totalling 53 lines in this issue.
Topics of the day:
1. Informations - DRIP IN Emitters (2)
----------------------------------------------------------------------
Date: Wed, 25 Jun 1997 22:11:07 -0300
From: Rubens Duarte Coelho (rdcoelho@CARPA.CIAGRI.USP.BR)
Subject: Informations - DRIP IN Emitters
Dear friends from trickle-l ..... I need some references about Drip - In
Irrigation Company - Fresno / CA !
Comparing Drip In PC with Ram Netafim what are the points + and - ??
Does anyone Know large projects ( ) 300 acres - orchards) using this
technology .... there are some dealers trying to introduce these products
in Brazil and we don't have experience with this equipment ?
Thank You in antecipating for any comments !
Rubens Coelho
------------------------------
Date: Wed, 25 Jun 1997 19:31:29 -0700
From: Rodney Ruskin (geoflow1@SLIP.NET)
Subject: Re: Informations - DRIP IN Emitters
At 10:11 PM 6/25/97 -0300, Rubens Duarte Coelho wrote:
)Dear friends from trickle-l ..... I need some references about Drip - In
)Irrigation Company - Fresno / CA !
)
)Comparing Drip In PC with Ram Netafim what are the points + and - ??
)
)Does anyone Know large projects ( ) 300 acres - orchards) using this
)technology .... there are some dealers trying to introduce these products
)in Brazil and we don't have experience with this equipment ?
)
)Thank You in antecipating for any comments !
)
)Rubens Coelho
)
Go to http://www.geoflow.com. There you will find a comparison of the
plugging resistance of Netafim Bioline (the RAM emitter) and Geoflow
Wasteflow (the Drip In P/C emitter) as tested by C.I.T. (the Center of
Irrigation Technology, Fresno.
There are may large projects of both emitters and they all appear to work
well, but you can judge the comparative merits yourself from the report above.
Rodney Ruskin
rr@geoflow.com
------------------------------
End of TRICKLE-L Digest - 19 Jun 1997 to 25 Jun 1997
****************************************************
Date: Fri, 27 Jun 1997 00:01:57 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 25 Jun 1997 to 26 Jun 1997
There are 2 messages totalling 74 lines in this issue.
Topics of the day:
1. Informations - DRIP IN Emitters
2. Drip-In Home page
----------------------------------------------------------------------
Date: Thu, 26 Jun 1997 09:29:10 -0500
From: "W. Bryan Smith" (wsmth@CLEMSON.EDU)
Subject: Re: Informations - DRIP IN Emitters
) Dear friends from trickle-l ..... I need some references about Drip - In
) Irrigation Company - Fresno / CA !
)
) Comparing Drip In PC with Ram Netafim what are the points + and - ??
)
) Does anyone Know large projects ( ) 300 acres - orchards) using this
) technology .... there are some dealers trying to introduce these products
) in Brazil and we don't have experience with this equipment ?
)
) Thank You in antecipating for any comments !
)
) Rubens Coelho
)
Rubens,
A local irrigation company here in South Carolina has been selling
Drip-In for years with good results. They also have Netafim RAM on
their product line (and like it, too), but they show no preference
for RAM over Drip-In.
If you need moer info let me know and I'll ask some questions for
you.
Bryan
=|===|===|===|===|===|===|===|===|===|===|=
W. Bryan Smith
Area Extension Agent - Irrigation / Water Quality
Clemson Extension Service
P.O. Box 160, Newberry, South Carolina 29108 USA
Office: 803 276-1091 FAX: 803 276-1095
Internet: wsmth@clemson.edu
=|===|===|===|===|===|===|===|===|===|===|=
All opinions are my own and not reflective of the
policies of Clemson University or the Cooperative
Extension Service.
------------------------------
Date: Thu, 26 Jun 1997 10:50:10 -0500
From: "W. Bryan Smith" (wsmth@CLEMSON.EDU)
Subject: Drip-In Home page
Rubens,
Here's the URL for the Drip-In home page (found it in my bookmarks
this morning):
http://www.electriciti.com/dripin/
Regards,
Bryan
=|===|===|===|===|===|===|===|===|===|===|=
W. Bryan Smith
Area Extension Agent - Irrigation / Water Quality
Clemson Extension Service
P.O. Box 160, Newberry, South Carolina 29108 USA
Office: 803 276-1091 FAX: 803 276-1095
Internet: wsmth@clemson.edu
=|===|===|===|===|===|===|===|===|===|===|=
All opinions are my own and not reflective of the
policies of Clemson University or the Cooperative
Extension Service.
------------------------------
End of TRICKLE-L Digest - 25 Jun 1997 to 26 Jun 1997
****************************************************
Date: Sat, 28 Jun 1997 00:02:55 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 26 Jun 1997 to 27 Jun 1997
There is one message totalling 26 lines in this issue.
Topics of the day:
1. Adios/Adieu/Salaam/Shalom/Goodbye
----------------------------------------------------------------------
Date: Fri, 27 Jun 1997 11:39:23 -0700
From: Bret Scaliter (bscaliter@MAIL.AIP.COM)
Subject: Adios/Adieu/Salaam/Shalom/Goodbye
To all writers/contributors/friends:
I would like to inform you that I have resigned my position at Adams
Trade Press, Inc. effective today June 27th, due to what I perceive to
be deceit and gross ethical infractions, to which I will not be a
party.
Thank you for your support, friendship and in the case of those of you
who contributed to the magazines ( for your fine writing.
Should you wish to contact me in the future, or know of someone
seeking an editor/writer, my home e-mail address is:
(scaliter@eee.org)
Regards,
Bret Scaliter
------------------------------
End of TRICKLE-L Digest - 26 Jun 1997 to 27 Jun 1997
****************************************************
Date: Sun, 29 Jun 1997 00:01:02 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 27 Jun 1997 to 28 Jun 1997
There is one message totalling 54 lines in this issue.
Topics of the day:
1. Introductory questions
----------------------------------------------------------------------
Date: Sat, 28 Jun 1997 10:33:20 -0200
From: "Brian E. Carlick" (brianeb@CYBERIA.NET.LB)
Subject: Introductory questions
1) Briefly, what is your affiliation with trickle/drip irrigation?
at the moment none, but I am planning to grow blueberries in the a part of
the uk that does not get much rain, they will need some form of irrigation
2) What crops or plants do you use drip irrigation on?
blueberries
3) If using subsurface drip irrigation, what is the average depth of
placement of the drip lateral?
do not know yet, is subsurface suitable for Blueberries?
4) What problems have you encountered with drip irrigation?
5) Fertigation is a real advantage of drip irrigation. What form of N, P
and K have you been trying and to what success?
no data yet on this aspect
6) Have you experienced a reduction in fertilizer and/or water use?
7) Do you have water quality problems? If so, how do you tackle the
situation?
I have just purchased some land, it has a well, water tests will be carried
out soon
8) How frequent do you irrigate? Many times a day, one long session per
day, or once every several days?
I have no data yet on this subject regarding bluebreeies
9) Do you have rodent damage? If so, how do you control the problem?
the land has lots of rabbits, part is fenced, some more fencing will be
necessary
10) Are you pleased with the uniformity of your system or systems? Were
they designed correctly?
11) How did you find out about Trickle-L?
I subscribe to the USDA mag, there was an articule this month on the subject.
************************************************************************
------------------------------
End of TRICKLE-L Digest - 27 Jun 1997 to 28 Jun 1997
****************************************************
Date: Mon, 30 Jun 1997 00:00:04 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: TRICKLE-L Digest - 28 Jun 1997 to 29 Jun 1997
There are 2 messages totalling 43 lines in this issue.
Topics of the day:
1. Informations - DRIP IN Emitters
2. Randall Merriott has joined Equipment Supply Co., Inc.
----------------------------------------------------------------------
Date: Sun, 29 Jun 1997 08:24:14 -0500
From: alekperc@BGUMAIL.BGU.AC.IL
Subject: Re: Informations - DRIP IN Emitters
Dear Rubens Coelho
You could to see this technology a lot in all part of Israel.
Good lack, Dr. Chingiz Alekperov
)Dear friends from trickle-l ..... I need some references about Drip - In
)Irrigation Company - Fresno / CA !
)
)Comparing Drip In PC with Ram Netafim what are the points + and - ??
)
)Does anyone Know large projects ( ) 300 acres - orchards) using this
)technology .... there are some dealers trying to introduce these products
)in Brazil and we don't have experience with this equipment ?
)
)Thank You in antecipating for any comments !
)
)Rubens Coelho
------------------------------
Date: Sun, 29 Jun 1997 20:34:50 -0400
From: Merriott@AOL.COM
Subject: Randall Merriott has joined Equipment Supply Co., Inc.
Hi, folks:
Just wanted to announce that I recently joined Equipment Supply Co., Inc. in
Lubbock, Texas. Equipment Supply is an ag irrigation distributor that
supplies irrigation dealers throughout West Texas, Western Oklahoma, New
Mexico, Arizona, Southern California, and Western Mexico. My duties will
include designing pivot sprinkler packages as well as continuing involvement
in drip irrigation.
Randall Merriott
formerly of AquaMizer Irrigation
------------------------------
End of TRICKLE-L Digest - 28 Jun 1997 to 29 Jun 1997
****************************************************
Prepared by Steve Modena, AB4EL
Suggestions and comments to: modena@SunSITE.unc.edu