SOILS-L: 199510XX
is the compilation of discussion during Oct 95
via AB4EL Web Digests @ SunSITE
>From root@crcnis1.unl.edu Sun Oct 1 20:37 EDT 1995
Date: Sun, 1 Oct 1995 19:27:05 -0500
Message-Id: <199510020027.AA07615@crcnis1.unl.edu>
Subject: SOILS-L digest 380
Contents:
New URL for WWW maps (jsnyd317@ix.netcom.com (James Snyder))
Date: Sun, 1 Oct 1995 06:46:24 -0700
From: jsnyd317@ix.netcom.com (James Snyder)
Subject: New URL for WWW maps
Hi folks
I have recently changed my URL for my home page of map sites on the World
Wide Web. My previous provider was offline too often.
The new URL is: http://www.serve.com/~JSnyder
I hope that you enjoy these maps and will let me know what you think after
visiting my home page.
Thank you
Jim
jsnyd317@ix.netcom.com
WWW: http://www.serve.com/~JSnyder
End of Digest
>From root@crcnis1.unl.edu Mon Oct 2 20:44 EDT 1995
Date: Mon, 2 Oct 1995 19:27:46 -0500
Message-Id: <199510030027.AA09162@crcnis1.unl.edu>
Subject: SOILS-L digest 381
Contents:
Re: New URL for WWW maps (HAYES@dgl.ssc.mass.edu)
WOODWASTE INFO REQUEST (Rob Kline 963-2518 <RKLINE@galaxy.gov.bc.ca>)
Re: Organic carbon (nilantha@mv.pi.csiro.au (Nilantha Hulugalle))
Date: Mon, 02 Oct 1995 16:10:48 -0400 (EDT)
From: HAYES@dgl.ssc.mass.edu
Subject: Re: New URL for WWW maps
Dear Jim--
Would you be so kind as to remind me of the types of maps
and their range of map scales that you are providing on the web?
I apologise if you have done this already, but here at my campus
access to the web during the daytime can be quite sluggish and
it would be helpful to know in advance. Thanks much.
John Hayes
Dept. of Geography
Salem State College
Salem, MA 01970
Date: Mon, 02 Oct 1995 13:07:00 -0700 (PDT)
From: Rob Kline 963-2518 <RKLINE@galaxy.gov.bc.ca>
Subject: WOODWASTE INFO REQUEST
I have a request for info on woodwaste applications to farmland.
Much of what I have seen has been work from the 1950-1970's and
was wondering if there has been anything more recent.
The info that I need is on C:N ratios of different wood types,
acceptable target C:N ratios of the waste before soil mixing,
rates of decompostion (we are looking for info on prairie-type
conditions, cold winters, short summers often with drought, etc.).
Contacts, journal articles, books references would all be
appreciated.
Rob Kline
Resource Planning Specialist
Former Soil Conservation Specialist
BC Ministry of Agriculture, Fisheries and Food
RR#8 RMD#7
Prince George, B.C., CANADA
V2N-4M6
PH: 604-963-2518
FAX: 604-963-2520
Date: Tue, 3 Oct 1995 09:12:51 +1000
From: nilantha@mv.pi.csiro.au (Nilantha Hulugalle)
Subject: Re: Organic carbon
>Date: Thu, 28 Sep 1995 21:46:34 -0500
>From: "RICHARD MACEWAN" <RJM@fs3.ballarat.edu.au>
>To: Multiple recipients of list <soils-l@unl.edu>
>Subject: Organic carbon
>
>Does anyone have any experience of the HACH 3000 system and
>measurement of organic carbon. The method uses a cold digestion for
>10 minutes, so recovery is going to be less than standard methods using
>heat. The spectro comes with standards as ampules which are made up
>and the readout on the instrument is given as " organic matter ".
>Obviously some fudge factors are used to convert OC to organic
>matter, and possibly to allow for approx 75 % recovery. This is very
>convenient for routine comparisons if everyone uses the same system
>but irritating if what you want is a measure of OC. Obviously the
>instrument does measure OC the problem is interpreting the calculated
>OM result - any help offered ?
>
>Richard MacEwan,
>University of Ballarat
>-------------------------------------------------------------------------------
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Richard,
About 2 years ago I had the same questions about the HACH system. NSW
Agricultures's analytical labs at Rydalmere (near Sydney) evaluated the
HACH system against conventional methods of determining OC about the same
time. They concluded that the results obtained with HACH were somewhat
questionable, and recommended against using it for research. But they did
state that it was suitable for general extension work. Their lab tel no. is
02-843-5777. Regards,
Nilantha Hulugalle, Australian Cotton Research Institute, Narrabri, NSW,
End of Digest
>From root@crcnis1.unl.edu Wed Oct 4 10:41 EDT 1995
Date: Wed, 4 Oct 1995 09:11:29 -0500
Message-Id: <199510041411.AA20922@crcnis1.unl.edu>
Subject: SOILS-L digest 382
Contents:
Introduction (Mark Johnston <MJOHNSTO@sky.LakeheadU.Ca>)
Date: Wed, 04 Oct 1995 09:57:04 -0500 (EST)
From: Mark Johnston <MJOHNSTO@sky.LakeheadU.Ca>
Subject: Introduction
Soil Fans:
I am a new subscriber to this list. I am a forest ecologist with the
Ontario Ministry of Natural Resources, Centre for Northern Forest
Ecosystem Research in Thunder Bay, Ontario. Our institute focuses on
research dealing with the impacts of timber harvesting and natural
disturbance (fire) on boreal forest ecosystems. My interests are in
the effects of disturbance on vegetation and soils in both upland
forest and aquatic ecosystems. I have research projects established
looking at how fire and harvesting affect soil chemical
characteristics and vegetative succession, and other work
investigating how buffers around lakes affect nutrient and sediment
fluxes from uplands to aquatic systems. Finally, I am looking at soil
and vegetation carbon storage and how this changes with harvesting
and fire disturbance at the scale of communities and landscapes.
I would like to hear from others on this list about any similar work
they may be doing.
Cheers.
---
Dr. Mark Johnston
Centre for Northern Forest Ecosystem Research
Lakehead University, 955 Oliver Road
Thunder Bay, Ontario, Canada P7B 5E1
tel (807) 343-4012 fax (807) 343-4001
internet: mjohnsto@sky.lakeheadu.ca
End of Digest
>From root@crcnis1.unl.edu Thu Oct 5 10:29 EDT 1995
Date: Thu, 5 Oct 1995 09:12:10 -0500
Message-Id: <199510051412.AA21821@crcnis1.unl.edu>
Subject: SOILS-L digest 383
Contents:
movement of polluted water (SDANIEL@SOPHIA.SPH.UNC.EDU)
Re: Measuring moisture by TDR in strongly attenuating media ("Rabi H. Mohtar" <RHM8@PSUVM.PSU.EDU>)
Re: movement of polluted water ("JONATHAN D. PHILLIPS" <GEPHILLI@ECUVM.CIS.ECU.EDU>)
Date: Wed, 04 Oct 1995 11:01:42 -0400 (EDT)
From: SDANIEL@SOPHIA.SPH.UNC.EDU
Subject: movement of polluted water
Greetings!
I am a new soils-L subscriber. My name is Sylvia Daniel, Program Chief in
the Environmental Health Division of a local health agency. The North
Carolina Attorney General's Office is representing my program in a formal
appeal and a response to the following information may help our case and
would be greatly appreciated:
Assuming a water gradient table of .02, how long will it take residential
sewage effluent to move subsurface 100 feet to a drinking water well 100
feet down gradient? The static water level of the well is 30 feet. The
saturated conductivity is 6.7 X 10 to the minus 5 feet per second or
2.9 inches per hour.
Please include formulas or technical information with your response.
Thanks!
S. Daniel
tel: (704)336-5565
Charlotte, North Carolina
Internet:Sdaniel@sophia.sph.unc.edu
Date: Wed, 4 Oct 95 14:19 EDT
From: "Rabi H. Mohtar" <RHM8@PSUVM.PSU.EDU>
Subject: Re: Measuring moisture by TDR in strongly attenuating media
You can check with Mariana Amato at AMATO at PZVX85.UNIBAS.IT. I am not sure i
f she is on any of the two lists.
Rabi Mohtar
Date: Thu, 05 Oct 95 07:14:04 EDT
From: "JONATHAN D. PHILLIPS" <GEPHILLI@ECUVM.CIS.ECU.EDU>
Subject: Re: movement of polluted water
Re: Movement of polluted water to a well . . . .
If the flow is Darcian, or close enough, the problem can solved with refer-
ence to any hydrology or soils textbook in about 30 seconds, so I presume
that there must be some reason to suspect more complicated, non-Darcian flow.
In that case, much more information would be required to supply an answer or
estimate. By the way, whose side is our A.G. on, the polluter or the folks with
the threatened well?
Jonathan Phillips
DEPARTMENT OF GEOGRAPHY
EAST CAROLINA UNIVERSITY
Greenville, NC 27858-4353
GEPHILLI@ECUVM.CIS.ECU.EDU
919/328-6082
End of Digest
>From root@crcnis1.unl.edu Fri Oct 6 10:26 EDT 1995
Date: Fri, 6 Oct 1995 09:13:08 -0500
Message-Id: <199510061413.AA24160@crcnis1.unl.edu>
Subject: SOILS-L digest 384
Contents:
Re: movement of polluted water (Wes Jennings <wes@eskimo.com>)
Re: movement of polluted water (SDANIEL@SOPHIA.SPH.UNC.EDU)
sensitivity on CERES-WHEAT ("T.MAVROMATIS" <T.Mavromatis@uea.ac.uk>)
Date: Thu, 5 Oct 1995 07:55:29 -0700 (PDT)
From: Wes Jennings <wes@eskimo.com>
Subject: Re: movement of polluted water
On Thu, 5 Oct 1995, JONATHAN D. PHILLIPS wrote:
> Re: Movement of polluted water to a well . . . .
>
> If the flow is Darcian, or close enough, the problem can solved with refer-
> ence to any hydrology or soils textbook in about 30 seconds, so I presume
> that there must be some reason to suspect more complicated, non-Darcian flow.
> In that case, much more information would be required to supply an answer or
> estimate. By the way, whose side is our A.G. on, the polluter or the folks with
> the threatened well?
>
> Jonathan Phillips
> DEPARTMENT OF GEOGRAPHY
> EAST CAROLINA UNIVERSITY
> Greenville, NC 27858-4353
> GEPHILLI@ECUVM.CIS.ECU.EDU
> 919/328-6082
>
Good response Jonathan! I suspect field conditions may indicate
unsaturated flow and variable soil materials exist. Therefore the
estimate is very dependent upon a careful analysis of field conditions.
This of course will require the assistance of someone who can view the
site. I suggest the original correspondent look for qualified natural
resource consultants or university professors in her regional area for
assistance.
Wes Jennings, wes@eskimo.com
Puget Land Consultants
206-474-4718
Date: Thu, 05 Oct 1995 12:56:03 -0400 (EDT)
From: SDANIEL@SOPHIA.SPH.UNC.EDU
Subject: Re: movement of polluted water
Thanks Phillips/Jennings...
Three degreed soil scientists and one geologist are working on this problem.
If you can recommend a good reference book, surely we can solve this. We
have information from a resource consultant which failed to include the
transit information.
I will share your comments with the group.
Thanks again..... SD
Date: Thu, 05 Oct 1995 23:35:48 BST
From: "T.MAVROMATIS" <T.Mavromatis@uea.ac.uk>
Subject: sensitivity on CERES-WHEAT
Hallo,
I am a Ph.D student and I am working on CERES-WHEAT v2.9 with some
crop data from central france. Has anyone out there could inform me
about the maximum values that the genetic coefficients could get ?
How we can check the sensitivity of the model to soil characteristics
in a multi-layer adopted soil-profile and to the applied Nitrogen
in the case of more than one fertilizer applications ? Should
the sensitivity in that case be applied only in one typical year
or in every year of our period considering the different Nitrogen
stress that appears in each growing season ?
I would really appreciate any response.
Theodoros Mavromatis
End of Digest
>From root@crcnis1.unl.edu Sat Oct 7 10:25 EDT 1995
Date: Sat, 7 Oct 1995 09:13:59 -0500
Message-Id: <199510071413.AA15600@crcnis1.unl.edu>
Subject: SOILS-L digest 385
Contents:
temperate rainforest soils (Redhaird1@aol.com)
Date: Sat, 7 Oct 1995 06:58:05 -0400
From: Redhaird1@aol.com
Subject: temperate rainforest soils
I am currently advising a student who is interested in comparing the
characteristics of temperate rainforest soils (Olympic Nat. Forest type) with
those of tropical rainforest soils. So far have not been able to find much
data on temperate rainforest soils. Can anyone provide some references?
Thanks in advance.
Frances Reese, Adjunct Instructor
Department of Earth Sciences
State University College at Brockport, NY
E-mail: FranReese@aol.com
End of Digest
>From root@crcnis1.unl.edu Sun Oct 8 10:25 EDT 1995
Date: Sun, 8 Oct 1995 09:14:16 -0500
Message-Id: <199510081414.AA23242@crcnis1.unl.edu>
Subject: SOILS-L digest 386
Contents:
Re: temperate rainforest soils (tomt@teleport.com (Tom Thomson))
Re: temperate rainforest soils (Al Stangenberger <forags@nature.Berkeley.EDU>)
information (Luis Geraldo Teixeira Soria <tsoria@servidor.nos.telebahia.net.br>)
Date: Sat, 7 Oct 1995 08:58:45 -0700
From: tomt@teleport.com (Tom Thomson)
Subject: Re: temperate rainforest soils
>I am currently advising a student who is interested in comparing the
>characteristics of temperate rainforest soils (Olympic Nat. Forest type) with
>those of tropical rainforest soils. So far have not been able to find much
>data on temperate rainforest soils. Can anyone provide some references?
> Thanks in advance.
>
>Frances Reese, Adjunct Instructor
>Department of Earth Sciences
>State University College at Brockport, NY
>E-mail: FranReese@aol.com
>
>
>
Agood initial starting place is to obtain the SCS (NRCS) Soil Survey Manuals
for the regions which you are interested in. Also, there may be data
summaries of Washington State soils which may detail physio-chemical
properties of the soils in question. Oregon State uNiversity has published
a report Soils of Oregon: Summaries of Physical and Chemical Data. Special
Report 662. 1982 and Soils of Oregon: Their Taxonomic Relationships and
Physiography. Special Report 535. 1979. Either these reports may prove
useful or perhaps there exist counterparts of these reports for Washington
state !???
Since these reports exist for Oregon why bother with that crowded state to
our north???
Tom Thomson
Northwest Agricultural Consulting
Date: Sat, 7 Oct 1995 09:16:05 -0700
From: Al Stangenberger <forags@nature.Berkeley.EDU>
Subject: Re: temperate rainforest soils
Another possible reference:
Heilman, P., Anderson, H., and D. Baumgartner (eds.). 1979. Forest soils of
the Douglas-fir region. Washington State Univ., Cooperative Extension Service,
Pullman, Washington 99164.
It's not specific to the rain forest part of the Douglas-fir region, but has
good discussions of geology, soils, vegetation, etc.
--
Al Stangenberger Univ. of California at Berkeley
forags@nature.berkeley.edu Dept. of Env. Sci., Policy, & Mgt.
BITNET: FORAGS AT UCBNATUR 145 Mulford Hall # 3114
(510) 642-4424 FAX: (510) 643-5438 Berkeley, CA 94720-3114
Date: Sat, 7 Oct 1995 21:04:02 -0300 (EST)
From: Luis Geraldo Teixeira Soria <tsoria@servidor.nos.telebahia.net.br>
Subject: information
I would like to receved information about others list of e-mail, where
have information about "Natural Agriculture" and "Organic agriculture"
Thanks about any informaton.
Luis Soria
E-mail: tsoria@nos.com.br
tsoria@ax.ibase.org.br
..
End of Digest
>From root@crcnis1.unl.edu Mon Oct 9 19:47 EDT 1995
Date: Mon, 9 Oct 1995 18:26:23 -0500
Message-Id: <199510092326.AA13659@crcnis1.unl.edu>
Subject: SOILS-L digest 387
Contents:
Re: movement of polluted water (GILGEO@aol.com)
Date: Mon, 9 Oct 1995 18:22:15 -0400
From: GILGEO@aol.com
Subject: Re: movement of polluted water
In a message dated 95-10-04 11:05:03 EDT, you write:
>)
>
>G
What type of aquifer is it?? To perform a Darcy's seepage velocity
calculation, the porosity of the formation must be known. If you can give us
the formation material, a porosity could be estimated.
Best Regards,
Gil Oudijk
Hydrotechnology Consultants, Inc.
77 Bayberry Road
Princeton, New Jersey 08540
Tel. 609.466.9628
Fax 609.466.3634
End of Digest
>From root@crcnis1.unl.edu Tue Oct 10 19:50 EDT 1995
Date: Tue, 10 Oct 1995 18:37:53 -0500
Message-Id: <199510102337.AA01779@crcnis1.unl.edu>
Subject: SOILS-L digest 388
Contents:
Re: soil erosion on marginal land (alexander.nidorf@linacre.oxford.ac.uk (Alexander Nidorf))
Date: Tue, 10 Oct 1995 09:00:59 +0100
From: alexander.nidorf@linacre.oxford.ac.uk (Alexander Nidorf)
Subject: Re: soil erosion on marginal land
I am new member on the list. My name is Alex Nidorf, and I am a MSc. student
at the Environmental Change Unit, University of Oxford. Before coming here I
worked for several years in northern Thailand. Most of my work was with
local agriculture NGO's - we were in hill tribe comunities, dealing with
land degredation, deforestation etc. (the typical sorts of problems that
farmers working on marginal land face). These experiences brought me to
Oxford to study soil erosion, climate change, and how these factors will
influence the adaptation of highland swidden agriculture (sounds fancy, but
really I'm just a redneck who likes to live up in the mountains and play
with dirt). I am interested in contacting people who are working in these
areas (i.e. soil erosion and highland swidden farming), especially people
who have experience in Southeast Asia. I am also interested in modeling soil
erosion on sloped swiddens. By the way, how do you all think this years
unusually heavy rains in northern Thailand (i.e. potential for massive soil
erosion) will effect soil fertility and crop yields?
Alex
End of Digest
>From root@crcnis1.unl.edu Sun Oct 15 03:45 EST 1995
Date: Sat, 14 Oct 1995 22:36:25 -0500
Message-Id: <199510150336.AA17004@crcnis1.unl.edu>
Subject: SOILS-L digest 389
Contents:
Perc Test (Jscott6615@aol.com)
Date: Sat, 14 Oct 1995 23:29:22 -0400
From: Jscott6615@aol.com
Subject: Perc Test
Dear Colleges;
Newton County, Missouri (USA) currently allows both peculation tests and on
site evaluations by soil scientist for septic systems. Most of us know that
the on site evaluation by soil scientists gives more reliable data for the
design of the system, but persons out side the soil science field may not.
There is a meeting in Newton County Tuesday morning (central time zone USA)
to discuss if percolation tests are suitable for designing a septic system.
If you wish to write a letter in support of fellow soil scientists in
Missouri you may fax them to the Newton County Health Department at
417-451-8282. Please send a cover addressed to Rayna Broadway, Environmental
Sanitarian.
Thank you
J. Scott Eversoll
jscott6615@aol.com
End of Digest
>From root@crcnis1.unl.edu Mon Oct 16 06:41 EST 1995
Date: Mon, 16 Oct 1995 01:29:27 -0500
Message-Id: <199510160629.AA26051@crcnis1.unl.edu>
Subject: SOILS-L digest 390
Contents:
To Dr. Buchan ONLY. TDR and Soil Moisture ("Neba Michael Ambe" <ambebihn@pilot.msu.edu>)
Date: Mon, 16 Oct 1995 02:19:53 -0400 (EDT)
From: "Neba Michael Ambe" <ambebihn@pilot.msu.edu>
Subject: To Dr. Buchan ONLY. TDR and Soil Moisture
Dr Graeme Buchan, Reader in Soil & Environmental Physics,
Dept of Soil Science, PO Box 84, Lincoln University, New Zealand
Please contact Dr. Charles Kome at:
komechar@pilot.msu.edu
He did some work on turf using TDR for various soil depths. He will be glad to
discuss with you.
-------------
Sorry I had to put this note to all on the server because I did not have Dr.
Buchan's email address.
neba
> Does anyone have experience of the development or use of TDR (Time-
> Domain Reflectometry) technology to measure moisture content in
> strongly attenuating media?
>
> My specific interest is in measuring the moisture content in
> fermenting compost, i.e. during the active stages of the composting
> process, when the medium is replete with microbial decomposers
> (`little rotters').
> Could you please advise me asap, or mail me any relevant
> publications.
> (I have already posted this request on the TDR-L listserver).
> Thankyou,
> Graeme Buchan
>
End of Digest
>From root@crcnis1.unl.edu Wed Oct 18 14:55 EST 1995
Date: Wed, 18 Oct 1995 09:43:12 -0500
Message-Id: <199510181443.AA12981@crcnis1.unl.edu>
Subject: SOILS-L digest 391
Contents:
Andisols (Wes Jennings <wes@eskimo.com>)
Date: Tue, 17 Oct 1995 06:57:15 -0700 (PDT)
From: Wes Jennings <wes@eskimo.com>
Subject: Andisols
Can anyone steer me towards good references sources about the new Andisol
order? I'm looking for reference materials that are definitive in nature
and worth having as a reference source.
Wes Jennings Email: wes@eskimo.com Voice: 206-474-4718
Puget Land Consultants P.O.Box 9635 Tacoma, WA 98409-0635
-----------------------------------------------------------------
We Must Be Land Stewards! ....... Our Future Is Tied To The Soil.
End of Digest
>From root@crcnis1.unl.edu Fri Oct 20 22:09 EST 1995
Date: Fri, 20 Oct 1995 16:55:22 -0500
Message-Id: <199510202155.AA13127@crcnis1.unl.edu>
Subject: SOILS-L digest 392
Contents:
Re: Forwarded mail (Tom Hodges <thodges@beta.tricity.wsu.edu>)
Date: Fri, 20 Oct 1995 14:36:23 -0700 (PDT)
From: Tom Hodges <thodges@beta.tricity.wsu.edu>
Subject: Re: Forwarded mail
If you are planning to be at the American Society of Agronomy Annual
Meetings in St. Louis, Missouri then consider attenting the Software
Scene Committee business meeting on Tuesday evening (Oct. 31, 7:30pm,
America's Center, room 121). A major item will be the future role
of computers, software, and networks in agriculture and the
ASA/CSSA/SSSA. We would appreciate getting ideas from a wide range
of people.
Tom Hodges, Software Scene Coordinator, 1994-1995
thodges@beta.tricity.wsu.edu
End of Digest
>From root@crcnis1.unl.edu Tue Oct 24 15:24 EST 1995
Date: Tue, 24 Oct 1995 10:04:49 -0500
Message-Id: <199510241504.AA03653@crcnis1.unl.edu>
Subject: SOILS-L digest 393
Contents:
Soils Book for Horticulture Diploma Course (Klaas Broersma <BROERSMA@bcrska.agr.ca>)
Crop residue management in irrigated cracking clay soils (Nilantha Hulugalle <nilantha@mv.pi.csiro.au>)
Date: 23 Oct 1995 18:49:19 -0400 (EDT)
From: Klaas Broersma <BROERSMA@bcrska.agr.ca>
Subject: Soils Book for Horticulture Diploma Course
I am looking for a elementary soils book to supplement a soils course for
a diploma course in horticulture at the University College of the Cariboo
in south Central British Columbia. This is not a university course and
students spend about 32 hrs on soils over a 4 month period. Books like
Brady's The Nature and Properties of Soils is too expensive and detailed.
I also looked at the Western Fertilizer Handbook (Horticulture addition)
but did not think it was too suitable. Course deals with soil formation,
physical properties, organic matter, chemistry and plant nutrition. The
class also takes parts part in field trips where the soils are observed
in the landscape (alluvial, grassland and forest soils) and as used in
the greenhouse industry.
Regards
Klaas Broersma
Date: Tue, 24 Oct 1995 12:20:29 +1000
From: Nilantha Hulugalle <nilantha@mv.pi.csiro.au>
Subject: Crop residue management in irrigated cracking clay soils
TO: Multiple recipients of list <soils-l@unl.edu>
FROM: Nilantha Hulugalle, Australian Cotton Research Institute, Narrabri,
NSW, Australia
Degradation in soil quality is major problem in cotton-based farming
systems of Australia, and in particular, the river valleys of north-western
New South Wales (semi-arid climate, cracking clay soils inc. Vertisols)
where a major proportion of Australia's cotton is produced. In general,
corresponding yield decreases can be of the order of 10-30%, although in
extreme cases yield losses of >90% can occur. Management systems whereby
such degradation can be ameliorated and avoided are, therefore, of primary
interest to many cotttongrowers and State Organizations as even a yield
decrease of 10% represents a loss of $42.9 million (based on 1993 values)
to the State of New South Wales. Past research has indicated several
possible management techniques such as minimum tillage and sowing rotations
for avoiding and ameliorating soil degradation in irrigated farming systems
(in cracking clays).
More recently, although surveys, consultations with individual
cottongrowers and cottongrower organizations have indicated a widespread
interest in utilizing combinations of minimum tillage and rotation systems
to combat degradation in soil quality, a major bottleneck in their
extension (particularly cereal rotation crops) to the industry is in
managing/disposing of the large amounts of rotation crop residues under
minimum tillage (in irrigated farming systems in cracking clay soils, inc.
Vertisols). Comments made by cottongrowers at a series of workshops in
November 1994 further indicated that little was known about (a) the "best"
existing method of residue management; eg. burning, incorporation etc., and
(b) the effects of these residue management systems on on-farm and and
off-farm soil and water quality.
We are planning to submit a proposal for an on-farm based project which
will address some of these issues in irrigated farming systems. The
research team includes soil physicists, a soil chemist, a soil
microbiologist, 2 on-farm extension agronomists, a weed scientist and an
economist. I would like to hear from any member of the SOILS-L group who is
currently working or has any past research experience in the area of crop
residue management in irrigated soils (particularly irrigated cracking clay
soils) with a view to initiating a discussion on the subject.
Kind regards,
Nilantha Hulugalle,
Soil Scientist
End of Digest
>From root@crcnis1.unl.edu Wed Oct 25 15:40 EST 1995
Date: Wed, 25 Oct 1995 10:06:10 -0500
Message-Id: <199510251506.AA02470@crcnis1.unl.edu>
Subject: SOILS-L digest 394
Contents:
Re: Soils Book for Horticulture Diploma Course (NERC006@UNLVM.UNL.EDU)
Re: Soils Book for Horticulture Diploma Course (Wes Jennings <wes@eskimo.com>)
Re: Soils Book for Horticulture Diploma Course (agaccess@pa.mother.com)
Re: Soils Book for Horticulture Diploma Course ("Rabi H. Mohtar" <RHM8@PSUVM.PSU.EDU>)
Re: Soils Book for Horticulture Diploma Course (tzimmerm@postbox.acs.ohio-state.edu (Tommy (Tom) L. Zimmerman))
Re: Soils Book for Horticulture Diploma Course (KSKgeos@aol.com)
Re: Soils Book for Horticulture Diploma Course (Daniel Fuka <dan@quetzalcoatl.com>)
Re: Soils Book for Horticulture Diploma Course (snrclark@muccmail.missouri.edu)
Date: Tue, 24 Oct 95 10:36:48 CDT
From: NERC006@UNLVM.UNL.EDU
Subject: Re: Soils Book for Horticulture Diploma Course
A simple book on soils might be Building Soils for Better Crops by Fred Magdoff
. It is published by the University of Nebraska Press. I think is about $20,
US money. Its major focus is on organic matter management but gets into soil
basics and nutrient cycling. Brady is more complete, but this is more suitable
to the public. It is 176 pages.
Charles A. Shapiro, Soils Scientist - Crop Nutrition
Associate Professor of Agronomy
Northeast Research and Extension Center
University of Nebraska
Box 111, Concord, NE 68728
Voice (402) 584 2803
Fax (402) 584 2859 e-mail NERC006@UNLVM.UNL.EDU
Date: Tue, 24 Oct 1995 09:04:20 -0700 (PDT)
From: Wes Jennings <wes@eskimo.com>
Subject: Re: Soils Book for Horticulture Diploma Course
On Tue, 24 Oct 1995, Klaas Broersma wrote:
> I am looking for a elementary soils book to supplement a soils course for
> a diploma course in horticulture at the University College of the Cariboo
> in south Central British Columbia. This is not a university course and
> students spend about 32 hrs on soils over a 4 month period. Books like
> Brady's The Nature and Properties of Soils is too expensive and detailed.
> I also looked at the Western Fertilizer Handbook (Horticulture addition)
> but did not think it was too suitable. Course deals with soil formation,
> physical properties, organic matter, chemistry and plant nutrition. The
> class also takes parts part in field trips where the soils are observed
> in the landscape (alluvial, grassland and forest soils) and as used in
> the greenhouse industry.
> Regards
> Klaas Broersma
>
Klaas, I recently taught a beginning soils course at a community college.
My students were in an environmental tech program. I used Soil Science
Simplified, 2nd. Ed., Milo I. Harpstead, et. al., Iowa State University
Press, 1988.
I am familiar with both the Brady soils book and Western Fertilizer
Handbook. The book I would recommend is between the two in complexity and
instructionally oriented. It is somewhat outdated with the classification,
but makes up for that in the clear writing style. This book might work out
for you in your instructional situation. Wes
Wes Jennings Email: wes@eskimo.com Voice: 206-474-4718
Puget Land Consultants P.O.Box 9635 Tacoma, WA 98409-0635
-----------------------------------------------------------------
We Must Be Land Stewards! ....... Our Future Is Tied To The Soil.
Date: Tue, 24 Oct 1995 10:21:42 -0700
From: agaccess@pa.mother.com
Subject: Re: Soils Book for Horticulture Diploma Course
>I am looking for a elementary soils book to supplement a soils course for
>a diploma course in horticulture at the University College of the Cariboo
>in south Central British Columbia. This is not a university course and
>students spend about 32 hrs on soils over a 4 month period. Books like
>Brady's The Nature and Properties of Soils is too expensive and detailed.
>I also looked at the Western Fertilizer Handbook (Horticulture addition)
>but did not think it was too suitable. Course deals with soil formation,
>physical properties, organic matter, chemistry and plant nutrition. The
>class also takes parts part in field trips where the soils are observed
>in the landscape (alluvial, grassland and forest soils) and as used in
>the greenhouse industry.
>Regards
>Klaas Broersma
Dear Klaas:
You may be interested in the following book for the course:
"The Soul of Soil: A Guide to Ecological Soil Management," by Grace
Gershuny and Joe Smillie, is now available in a new, extensively revised
third edition. A practical introduction to managing soil for long-term
productivity, this reference provides useful guidelines for making
management decisions based on ecological principles, with minimal reliance
on "off-farm" fertilizers.
Sustainable agriculture aims to protect the soil's ability to
regenerate nutrients lost when crops are harvested. This regenerative
capacity depends on the diversity, health and vitality of the organisms
that live, grow, reproduce, and die in the soil.
The goal of ecological soil management is to enhance conditions for
the billions of microbes found in every gram of healthy soil. These
microscopic organisms supply plants with the necessary nutrients at the
right time, and in the right form and amount.
The authors describe good management of soil organic matter and
humus to achieve long-lasting soil fertility. These methods include the use
of green manures, crop rotations, on-farm composting, and mineral
fertilizers. Detailed information is given to help the farmer with
everything from collecting soil samples to using practical, on-farm tests
that measure soil structure, water-holding capacity, and fertility.
This guide also tells farmers how to improve their skills of
observation, evaluation and management, as they must when reliance on
purchased inputs is reduced. Specific "how-to" information is given for
monitoring and analysis of many practices, such as application of composts
and manures, interpreting soil test results, and crop responses to
different fertility programs.
In addition to soilbuilding techniques, "The Soul of Soil"
discusses recordkeeping, cultivation, weed control, maintaining nutrient
balances, and soil testing. For those who are considering or have already
implemented organic certification, this book will aid in planning farm
operations.
The authors are experienced farmers, farm advisors and writers. Joe
Smillie has worked worldwide as a consultant in ecological agriculture
since 1976. He is co-author of "The Orchard Almanac." Grace Gershuny edited
"Organic Farmer: The Digest of Sustainable Agriculture" from 1990 to 1994,
and recently joined the staff of the USDA's National Organic Program to
implement its accreditation program for organic certification.
"The Soul of Soil" includes many tables, a glossary, lists of
resources, and a bibliography. Published by agAccess, the 158 page book
sells for $16.95, softcover. To order, send a check for the cover price
plus $4.00 shipping & handling (Californians please add 7.25% sales tax)
to:
agAccess
P.O. Box 2008
Davis, CA 95616.
MasterCard, Visa and purchase orders are accepted. Telephone Monday
through Friday 9am to 5:30pm PST and Saturdays 10am to 4pm PST (916)
756-7177. Email to agaccess@davis.com or fax to (916) 756-7188.
Date: Tue, 24 Oct 95 14:40 EDT
From: "Rabi H. Mohtar" <RHM8@PSUVM.PSU.EDU>
Subject: Re: Soils Book for Horticulture Diploma Course
Dear Klaas
Try the latest eddition of following book:
An Introduction to soils and plant growth
by Donahue, Miller , and Shickluna.
It does cover a broad base of soil science and plant nutrition.
Rabi Mohtar
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Rabi H. Mohtar internet:rhm8@psuvm.psu.edu
The Pennsylvania State University phone: (814) 865-2971
208 Agricultural Engineering Building fax: (814) 863-1031
University Park, PA 16802 "change begins with me"
Date: Tue, 24 Oct 1995 17:17:36 -0400
From: tzimmerm@postbox.acs.ohio-state.edu (Tommy (Tom) L. Zimmerman)
Subject: Re: Soils Book for Horticulture Diploma Course
I would try Plaster's Soil Science and Management, Delmar Publisher. It is
not too technical and does not assume a great deal of chemistry background.
>I am looking for a elementary soils book to supplement a soils course for
>a diploma course in horticulture at the University College of the Cariboo
>in south Central British Columbia. This is not a university course and
>students spend about 32 hrs on soils over a 4 month period. Books like
>Brady's The Nature and Properties of Soils is too expensive and detailed.
>I also looked at the Western Fertilizer Handbook (Horticulture addition)
>but did not think it was too suitable. Course deals with soil formation,
>physical properties, organic matter, chemistry and plant nutrition. The
>class also takes parts part in field trips where the soils are observed
>in the landscape (alluvial, grassland and forest soils) and as used in
>the greenhouse industry.
>Regards
>Klaas Broersma
>
>
**********************************************************************
Tommy (Tom) L. Zimmerman, Associate Professor
The Ohio State University Agricultural Technical Institute
1328 Dover Road, Wooster, OH 44691-4000
Voice: 216-264-3911, ext. 1325; FAX: 216-262-7634
E-Mail: tzimmerm@postbox.acs.ohio-state.edu OR zimmerman.4@osu.edu
**********************************************************************
Date: Tue, 24 Oct 1995 18:35:04 -0400
From: KSKgeos@aol.com
Subject: Re: Soils Book for Horticulture Diploma Course
My favorite standby is still my old soils textbook from Plant & Soil Science
days in school;
Olson, Gerald W., SOILS AND THE ENVIRONMENT - A Guide to Soil Surveys and
Their Applications, Chapman & Hall, New York, NY Copyright 1981 by Dowden &
Culver, Inc..
I think I paid $17.00 US for it back in 1981.
Good Luck,
Kent Koptiuch
KSKGeoS@aol.com
Date: Tue, 24 Oct 1995 17:37:32 -0600
From: Daniel Fuka <dan@quetzalcoatl.com>
Subject: Re: Soils Book for Horticulture Diploma Course
I don't see anything in the www page www.hp.com or in the
anonymous ftp site. But you may want to take a look for your
self to make sure that I am not missing something.
Talk to you later,
dan
Date: Tue, 24 Oct 95 14:36:03 CST
From: snrclark@muccmail.missouri.edu
Subject: Re: Soils Book for Horticulture Diploma Course
Dear Klaas Broersma:
I consider you look at Alan Wild's book "Soils and the Environment",
Cambridge Univ. Press., 1993. ISBN 0 521 43280 4.
Sincerely,
Clark J. Gantzer snrclark@mizzou1.missouri.edu
School of Natural Resources University of Missouri - Columbia
_______________________________________________________________________________
"... The land ethic simply enlarges the boundaries of the
community to include soil, waters, plants, and animals, or
collectively: the land."
Aldo Leopold
_______________________________________________________________________________
Subject: Soils Book for Horticulture Diploma Course
From: <soils-l@unl.edu> at MU-SMTP
Date: 10/24/95 9:46 AM
I am looking for a elementary soils book to supplement a soils course for
a diploma course in horticulture at the University College of the Cariboo
in south Central British Columbia. This is not a university course and
students spend about 32 hrs on soils over a 4 month period. Books like
Brady's The Nature and Properties of Soils is too expensive and detailed.
I also looked at the Western Fertilizer Handbook (Horticulture addition)
but did not think it was too suitable. Course deals with soil formation,
physical properties, organic matter, chemistry and plant nutrition. The
class also takes parts part in field trips where the soils are observed
in the landscape (alluvial, grassland and forest soils) and as used in
the greenhouse industry.
Regards
Klaas Broersma
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Date: Tue, 24 Oct 1995 09:36:05 -0500
Message-Id: <01HWSF8ZKH6Q0029N1@GW.AGR.CA>
Originator: soils-l@unl.edu
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Sender: soils-l@unl.edu
Version: 5.5 -- Copyright (c) 1991/92, Anastasios Kotsikonas
From: Klaas Broersma <BROERSMA@bcrska.agr.ca>
To: Multiple recipients of list <soils-l@unl.edu>
Subject: Soils Book for Horticulture Diploma Course
End of Digest
>From root@crcnis1.unl.edu Fri Oct 27 16:23 EST 1995
Date: Fri, 27 Oct 1995 11:06:09 -0500
Message-Id: <199510271606.AA22408@crcnis1.unl.edu>
Subject: SOILS-L digest 395
Contents:
Re: Soils Book for Horticulture Diploma Course (HAYES@dgl.ssc.mass.edu)
Date: Fri, 27 Oct 1995 11:23:46 -0400 (EDT)
From: HAYES@dgl.ssc.mass.edu
Subject: Re: Soils Book for Horticulture Diploma Course
Olson's SOILS AND THE ENVIRONMENT book is a good one but unfortunately it
is out of print and is no longer available. I was going to use it as a
supplementary text for my soils course a couple of years ago and looked into
its availability.
John Hayes
Geography Dept.
Salem State College
Salem, MA 01970
End of Digest
>From root@crcnis1.unl.edu Sat Oct 28 16:17 EST 1995
Date: Sat, 28 Oct 1995 11:06:55 -0500
Message-Id: <199510281606.AA08289@crcnis1.unl.edu>
Subject: SOILS-L digest 396
Contents:
5th French National Congress of Soil Science (cwalter@roazhon.inra.fr (Christian Walter))
Re: 5th French National Congress of Soil Science ("Gregory McIsaac" <GFM@age2.age.uiuc.edu>)
Re: Crop residue management in irrigated cracking clay soils ("Rabi H. Mohtar" <RHM8@PSUVM.PSU.EDU>)
Date: Fri, 27 Oct 1995 18:13:22 +0100
From: cwalter@roazhon.inra.fr (Christian Walter)
Subject: 5th French National Congress of Soil Science
The French Association of Soil Science (AFES) will held his 5th National
Congress
at Rennes (Brittany) in April 1996 (22 to 25).
This meeting adresses to all the French specialists of Soil Science for
presentation of original research taking the soil into account.
People from other countries are welcome.
The general topic of this meeting will be :
"The role of the soil in the transport of pollutants within the landscape."
More information :
- by Email to cwalter@roazhon.inra.fr
- by W3 to http://segolene.roazhon.inra.fr/afes/afes.html
---------------------------------------------------------------------
---------------------------------------------------------------------
Christian .WALTER
ENSA-INRA, Laboratoire de Science du Sol, 65 rue de Saint-Brieuc
35042 Rennes -=20
t=E9l : 99-28-54-39 ou 99-28-54-22 (standard)
Fax : 99-28-54-30
E-mail : cwalter@roazhon.inra.fr
-----------------------------------------------------------------------
-----------------------------------------------------------------------
Date: Fri, 27 Oct 1995 13:04:47 CST
From: "Gregory McIsaac" <GFM@age2.age.uiuc.edu>
Subject: Re: 5th French National Congress of Soil Science
Dear Christian Walter
Please send more information about this meeting.
Thank you,
Gregory McIsaac
University of Illinois
USA
> Date: Fri, 27 Oct 1995 12:12:41 -0500
> Reply-to: <soils-l@unl.edu>
> From: cwalter@roazhon.inra.fr (Christian Walter)
> To: Multiple recipients of list <soils-l@unl.edu>
> Subject: 5th French National Congress of Soil Science
> The French Association of Soil Science (AFES) will held his 5th National
> Congress
> at Rennes (Brittany) in April 1996 (22 to 25).
>
> This meeting adresses to all the French specialists of Soil Science for
> presentation of original research taking the soil into account.
> People from other countries are welcome.
>
> The general topic of this meeting will be :
> "The role of the soil in the transport of pollutants within the landscape."
>
> More information :
> - by Email to cwalter@roazhon.inra.fr
> - by W3 to http://segolene.roazhon.inra.fr/afes/afes.html
>
>
> ---------------------------------------------------------------------
> ---------------------------------------------------------------------
> Christian .WALTER
> ENSA-INRA, Laboratoire de Science du Sol, 65 rue de Saint-Brieuc
> 35042 Rennes -=20
> t=E9l : 99-28-54-39 ou 99-28-54-22 (standard)
> Fax : 99-28-54-30
> E-mail : cwalter@roazhon.inra.fr
> -----------------------------------------------------------------------
> -----------------------------------------------------------------------
>
>
Date: Sat, 28 Oct 95 10:36 EDT
From: "Rabi H. Mohtar" <RHM8@PSUVM.PSU.EDU>
Subject: Re: Crop residue management in irrigated cracking clay soils
Dear Nilantha
I am not a soil expert, however I am working in the soil water area. You have
not mention what type of irrigation you got going for the cotton fields. Did y
ou consider changing the type of irrigation you are using, if that is feasible?
Localized irrigation might limit the cracking compared to wetting larger portio
n of the field. Localized irrigation can but may not mean drip or micro irriga
tion.
Rabi Mohtar
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Rabi H. Mohtar internet:rhm8@psuvm.psu.edu
The Pennsylvania State University phone: (814) 865-2971
208 Agricultural Engineering Building fax: (814) 863-1031
University Park, PA 16802 "change begins with me"
End of Digest
>From root@crcnis1.unl.edu Sun Oct 29 18:52 EST 1995
Date: Sun, 29 Oct 1995 12:41:57 -0600
Message-Id: <199510291841.AA18310@crcnis1.unl.edu>
Subject: SOILS-L digest 397
Contents:
Intro and question (sjef@nelson.planet.org.nz)
Date: Mon, 30 Oct 1995 07:35:45 +1300
From: sjef@nelson.planet.org.nz
Subject: Intro and question
My name is Sjef Lamers. Live in New Zealand. Do research in the plant and
forest nutrition field.
I have been asked to address a seminar on olive growing on the aspects of
soil and climate requirement of olives. Olives are a new crop in New
Zealand. There is no research done at all on olive growing.
Where can I find information on the soil and climate requirements of olives?
Sjef Lamers
sjef@nelson.planet.org.nz
End of Digest
>From root@crcnis1.unl.edu Mon Oct 30 19:00 EST 1995
Date: Mon, 30 Oct 1995 12:42:39 -0600
Message-Id: <199510301842.AA04351@crcnis1.unl.edu>
Subject: SOILS-L digest 398
Contents:
RE: Soils Book for Horticulture Diploma Course ("DERRY THOMAS (02) 808-8385" <derry.thomas@tafensw.edu.au>)
Olive (m.perelli@agora.stm.it (Marino Perelli))
Date: Mon, 30 Oct 1995 14:10:15 +1100
From: "DERRY THOMAS (02) 808-8385" <derry.thomas@tafensw.edu.au>
Subject: RE: Soils Book for Horticulture Diploma Course
Klaas,
I too teach soils to students in a diploma of horticulture course at the Ryde
College of TAFE (Technical and Further Education), in Sydney, NSW Australia.
This course specialises in ornamental horticulture rather than fruit and
vegetables.
Our first year soil text is:
Growing Media for Ornamental Plants and Turf. Revised Ed (1994)
by Kevin Handreck and Neil Black.
University of New South Wales Press
22-32 King Street
Randwick NSW 2031
Australia
Phone: (02) 398-8900
Fax: (02) 398-3408
ISBN 0 86840 333 4
448 pp. Hardcover
Price: around $A35.00
This book was purpose-written here in Australia to provide relevant soils
knowledge for the ornamental plant grower. As well as providing the basic soils
information it has extensive chapters on Potting Mixes, Fertiliser use and
Soil-borne diseases in nurseries, Plant Containers, Composting, Managing Turf
Soils, Watering, and Hydroponics. It also has a chapter dealing with site
preparation in anticipation of planting out nursery stock into landscape
settings.
The book is aimed directly at the practical application of soil theory and so
has direct appeal to diploma level students. It contains some 30 simple tests
aimed to help horticulturists work with soils and other growing media.
We have been successfully using this book in its variuos editions for more than
10 years. It might be worth a look before you choose your text.
I'd be interested in hearing from you regards your final choice and more about
your teaching.
Cheers,
Derry Thomas
Horticulture
Ryde College of TAFE
Sydney NSW Australia
e-mail: derry.thomas@tafensw.edu.au
Date: Mon, 30 Oct 1995 18:07:36 GMT
From: m.perelli@agora.stm.it (Marino Perelli)
Subject: Olive
Sjef Lamers asked informations about olive.
G.Kregor <G.Kregor@MAILBOX.UQ.OZ.AU> sended an extract from the "Australian
New Crops Newsletter" to the agric-l discussion list
<AGRIC-L@UGA.CC.UGA.EDU> on October, 20.
The agronomic statements was correct, but Dimitris Rousopoulos
<dimrous@ATHENA.COMPULINK.GR> added that:
> The Phoenecians never introduced the olive to Greeks, and furthermore
> they did not even existed in 16th Cent. BC, whereas Greeks cultivated
> olives since at least 2.000 BC.
> The above is well founded by newer -and older- archaelogical testaments.
Marino Perelli
--------------------------------------
Marino Perelli free-lance agronomist
Via Puccini 11 - 30034 Mira VE - Italy
tel/autofax: +39 41 421995
E-mail: m.perelli@agora.stm.it
--------------------------------------
End of Digest
>From root@crcnis1.unl.edu Tue Oct 31 19:07 EST 1995
Date: Tue, 31 Oct 1995 12:42:53 -0600
Message-Id: <199510311842.AA29861@crcnis1.unl.edu>
Subject: SOILS-L digest 399
Contents:
Crop residue management in irrigated cracking clay soils (<Pat_Coyle@csgcalchem.ccmail.compuserve.com>)
Date: 31 Oct 95 10:26:12 EST
From: <Pat_Coyle@csgcalchem.ccmail.compuserve.com>
Subject: Crop residue management in irrigated cracking clay soils
---------------------------- Forwarded with Changes ---------------------------
From: Pat Coyle at CSGCalChem
Date: 10/30/95 9:52AM
*To: INTERNET:LISTSERV@unl.edu at CSERVE
Receipt Requested
Subject: Crop residue management in irrigated cracking clay soils
---------------------------- Forwarded with Changes ---------------------------
From: INTERNET:nilantha@mv.pi.csiro.au at CSERVE
Date: 10/24/95 10:45AM
*To: INTERNET:SOILS-L@UNL.EDU at CSERVE
Subject: Crop residue management in irrigated cracking clay soils
-------------------------------------------------------------------------------
============== Begin part 2 ==========================
Subject: Crop residue management in irrigated cracking clay soils
Author: Pat Coyle at CSGCalChem
Date: 10/30/95 9:52 AM
Vol. # 141 (May 1986) of Soil Science has a number of articles about the use of
polyacrylamide for aiding in the reduction of soil erosion and water run off.
Has anyone looked at using this type of technique?
Patrick Coyle
Research Chemist
Custom Specialty Chemical Group
Callaway Chemical Company
(All opinions are my fault)
______________________________ Forward Header __________________________________
Subject: Crop residue management in irrigated cracking clay soils
Author: INTERNET:nilantha@mv.pi.csiro.au at CSERVE
Date: 10/24/95 10:45 AM
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Oct 1995 10:04:13 -0500
Date: Tue, 24 Oct 1995 10:04:13 -0500
Message-Id: <19951024122028.3864d1c3.in@Toolman.mv.pi.csiro.au>
Originator: soils-l@unl.edu
Errors-To: jp@unlinfo.unl.edu
Reply-To: <soils-l@unl.edu>
Sender: soils-l@unl.edu
Version: 5.5 -- Copyright (c) 1991/92, Anastasios Kotsikonas
From: Nilantha Hulugalle <nilantha@mv.pi.csiro.au>
To: Multiple recipients of list <soils-l@unl.edu>
Subject: Crop residue management in irrigated cracking clay soils
TO: Multiple recipients of list <soils-l@unl.edu>
FROM: Nilantha Hulugalle, Australian Cotton Research Institute, Narrabri,
NSW, Australia
Degradation in soil quality is major problem in cotton-based farming
systems of Australia, and in particular, the river valleys of north-western
New South Wales (semi-arid climate, cracking clay soils inc. Vertisols)
where a major proportion of Australia's cotton is produced. In general,
corresponding yield decreases can be of the order of 10-30%, although in
extreme cases yield losses of >90% can occur. Management systems whereby
such degradation can be ameliorated and avoided are, therefore, of primary
interest to many cotttongrowers and State Organizations as even a yield
decrease of 10% represents a loss of $42.9 million (based on 1993 values)
to the State of New South Wales. Past research has indicated several
possible management techniques such as minimum tillage and sowing rotations
for avoiding and ameliorating soil degradation in irrigated farming systems
(in cracking clays).
More recently, although surveys, consultations with individual
cottongrowers and cottongrower organizations have indicated a widespread
interest in utilizing combinations of minimum tillage and rotation systems
to combat degradation in soil quality, a major bottleneck in their
extension (particularly cereal rotation crops) to the industry is in
managing/disposing of the large amounts of rotation crop residues under
minimum tillage (in irrigated farming systems in cracking clay soils, inc.
Vertisols). Comments made by cottongrowers at a series of workshops in
November 1994 further indicated that little was known about (a) the "best"
existing method of residue management; eg. burning, incorporation etc., and
(b) the effects of these residue management systems on on-farm and and
off-farm soil and water quality.
We are planning to submit a proposal for an on-farm based project which
will address some of these issues in irrigated farming systems. The
research team includes soil physicists, a soil chemist, a soil
microbiologist, 2 on-farm extension agronomists, a weed scientist and an
economist. I would like to hear from any member of the SOILS-L group who is
currently working or has any past research experience in the area of crop
residue management in irrigated soils (particularly irrigated cracking clay
soils) with a view to initiating a discussion on the subject.
Kind regards,
Nilantha Hulugalle,
Soil Scientist
============== End part 2 ============================
End of Digest
Prepared by Steve Modena, AB4EL
Suggestions and comments to: modena@SunSITE.unc.edu