Archive SOILS-L: file log9503, part 1/1, size 45133 bytes:

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INTRODUCING......

Phil Greenwood
Soil Physicist
AgResearch
Invermay Agricultural Centre
Private Bag
Mosgiel
NZ
e-mail greenwoodp@agresearch.cri.nz

Hi, one and all.
I have just discovered this listserv communication system and thought I
would join to see how it goes. Unfortunately, the first thing I see is a
constant stream of requests to unsubscribe, followed by debate over what is
useless and what is not.

My current work involvments are: the influence of intensive pastoral farming
systems on soil physical quality (mainly soil compaction, including soil
rejuvenation methods); use of dairy animal wastes for soil physical
improvement; disposal of dairy factory wastes onto soils; methods of
diagnosing degree of soil compactness, compactibility, and soil physical
constraints to root growth and pasture production.

Cheers
Phil

My name is Jock Churchman. I am a soil clay mineralogist/surface chemist.

I have been following the correspondence on this list for some time now.
When I first subscribed, I gave no more than my name. Now that I have found
a few spare moments, I want to introduce myself. My main current research
interests, with associated burning questions are:

1. Use and modification of clays to adsorb organic materials.
Some clays, beside expandable clays, have considerable micro- or
meso-porosity. Examples are halloysite and palygorskite. Can the pores in
these clays be used to hold/trap large organic molecules? I wonder if there
are analogies with zeolites, which hold very small molecules (with much
smaller pores)? Can these clays be modified to enhance their uptake of
organic molecules?

2. Microstructure of soils.
Do either polycations (Fe, Al and Ca)and their oxides and hydroxides or
organic matter make the major contribution to the stabilisation of soil
microaggregates? How do the means of stabilisation differ with soil type?
How are they affected by agricultural practices e.g. cultivation?

3. Sodicity.
To what extent can sodic soils be ameliorated simply by the addition of
organic matter? Is there a mimimum level of sodicity e.g. ESP below which
additions of organic matter have a net negative effect on the structure of
sodic soils?

In this regard, I was interested in the comment by Henry Sauer on 2 Feb.
about the use of biosolids on saline/sodic mine spoil. Infiltration rates
were smetimes slow (on the sodic soils?). He states "any source of organic
matter which may improve soil structure is beneficial". This would be true,
but added organic matter could have a negative effect if sodicity is too
high. In this case, organic matter acts as a dispersant and hence makes
infiltration even more difficult.

Finally, I look forward to useful information and debate on this branch of
the Internet. I thought Max Turner, among others, set a good example with
his well-informed comments on 22 January. Good on you, Max!

Dr Jock Churchman
CSIRO Division of Soils
Private Bag No. 2
Glen Osmond
South Australia 5064
AUSTRALIA

Phone: (08) 303 8498
61 8 303 8400 (International)

Fax: 61 8 303 8550

>
>> I don't want to sound petty, but I'm not sure that the "address of a
>> publisher" is proper material for a soils information exchange group.
>
>Someone needed access to a journal--Communications in
>Soil Science and Plant Analysis--that specifically focuses on soils.
>Is this inappropriate for a soils list?
>
>
It seems like the inquiry should be directed to a librarian rather than a
soils information exchange group. If there were fewer of these types of
inquiries, perhaps the group could begin to exchange REAL soils information.
T. Jot Smyth Internet: Jot_Smyth@NCSU.edu
Department of Soil Science Phone: (919) 515-2838
Box 7619 Fax: (919) 515-7422
North Carolina State University
Raleigh, NC 27695-7619

Netters

Surprisingly I have seen how it is spent the time of
communication on nonsense discussions. The knowledge of a journal of soils
it is evidently of prior importance on a discussion list as this is. The
matter could be if the one who asked for a journal address would ask for
any other kind of journal.

I think ANYTHING related to Soils concerns to this list. So help
us together to understand the soil-world queries and requests, it is my
thought. That is the spirit of the Internet communication.

================================================================================

Juan Carlos Casilimas R.
Departamento de Quimica Grupo de Quimica Teorica
Universidad del Cauca Universidad Nacional
Popayan, Cauca Santafe de Bogota, D.C.
COLOMBIA

================================================================================

Well,

all this 'which is apropriate stuff' was certainly not strictly
soil-related - so I no longer hesitate to submit my contribution to
this topic ;-)

Maybe with increasing traffic, the list should move to the usenet
system let's say as sci.geo.soils ?

Regards

Uli
--
Uli Wortmann

Dept. of Geology Fax (Germany) 89 3209 3168
Tech. Univ. Munich Fon 3232
email: uli@homer.geol.chemie.tu-muenchen.de

My name's Jon Brandt and I work for the Railroad Commission of Texas -
in the AML (Abandoned Mine Land) section. My experience includes
surface mine reclamation (liming acid minesoils, revegetation),
erosion control, and soil fertility.

I am currently working on several reclamation projects that have problems
with elevated electrical conductivity and SAR levels (in combination with
high saturation percentages). We are using a combination of halophytic
plants and additions of organic matter (hay mulch) to successfully establish
vegetation at these sites. In cases where the EC or SAR is too high
(16 or 20, respectively), we bring in several feet of suitable cover material.
However, I have heard of several companies that claim they have products that
can be applied to remediate saline and/or sodic soils. These might provide
an alternative to hauling in thousands of cubic yards of soil. I suspect
the products essentially provide a calcium source to displace sodium ions or
are surfactants. Does anyone have experience with these chemicals?

Thanks
_________________________________________________________________________
_ _ _ _
/ \ | \/ | | | Jon E. Brandt (512)305-8825 -- brandtj@osmre.gov
/ _^_ \ | |\/| | | |__ AML / SMRD / Railroad Commission of Texas
/_/ \_\ |_| |_| |____| P.O. Box 12967, Austin, TX 78711-2967

Dear Subscribers,

I would like to make a few comments regarding the recent
discussion about the content and format of the SOILS-L List. I
hope my comments will quell a prolonged debate of this matter
which in my opinion is not a discussion related to soil science.
I personally do not feel that the request
for the address of publishers of a soil science related journal
was out of line with the intent of this list. I began this list
for facilitating the exchange of both information and ideas
regarding soil science and that request fits in this category. It
is possible that some bandwidth could be saved by persons
replying directly to the requester rather than to the discussion
list. However, others on the list might also like to know the
answer to the same question.
I don't believe that the list is losing members as was suggested by
one subscriber because of this type of discussion. As of this morning,
there are 477 persons subscribed to SOILS-L and this number
tends to increase steadily. I would like subscribers to keep in
mind that with the rapid expansion of the Internet, many new
users who are unfamiliar with the mechanics of such things as mail
lists are exploring what information is available in their areas
of interest. Sometimes these new users find that the list is not
to their liking. Unfortunately, they are not clear as to how to
unsubscribe from the list and so we see the result as an
erroneous post to the discussion list.
Here I can try to be of assistance by providing better
documentation in the notification file which I realize is
lacking. I think the suggestions of mail list etiquette were on
target and I will try to include these ideas in a revised
notification message. Nevertheless, there will always be some
people who just don't get it even with expanded documentation.
Therefore, please try to let this problem slide and know that I
always reply to individuals who are having problems with the list
on a personal basis.
My viewpoint regarding SOILS-L is that almost anything
goes as long as it pertains to soil science. If bandwidth becomes
a problem then one can switch to the digested format or we can
begin to split out lists pertaining to sub-topics of interest. In
fact, I will post an advertisement for SOIL-CHEM in another
message. I feel that the broad spectrum of SOILS-L will always
have a place in the Internet community of soil scientists.
I request patience on the part of SOILS-L subscribers. I
welcome both 'Real' discussions of soil science topics as well as
simple resource questions. Facilitating the exchange of
information is what this list is about. I hope to see more of it.
Anyone wishing to debate my stance should contact me personally
at the address below. Thank you for your cooperation and input.

--
Sincerely,

Jerome Pier
Post-Doctoral Research Assistant
Biological Systems Engineering, Univ. Nebraska - Lincoln
jp@unl.edu

Dear Subscribers,

From page 9 of the March 1995 Agronomy News:

An email discussion group has been established for
discussion of soil chemistry research and policy issues. To
subscribe, contact LISTPROC@SOILS.UMN.EDU with the following
message:

SUBSCRIBE SOIL-CHEM First Lastname

A return message will confirm your subscription. For
information, contact the same address with:

INFORMATION SOIL-CHEM

or email to the List Owner, Paul Bloom, pbloom@soils.umn.edu.

Post messages to all subscribers to
SOIL-CHEM@SOILS.UMN.EDU but do not send subscription requests or
personal messages to this address.
To read archived messages, use <gopher.soils.umn.edu>.
The path to archive files is:

Computer Information/
General Information/
Selected Electronic Mailing List Archives/
Soil-Chem Mailing List Archive

The archives are also accessable through ftp by:

ftp://ftp.soils.umn.edu:pub/info/email-lists/soil-chem

--
Sincerely,

Jerome Pier
Post-Doctoral Research Assistant
Biological Systems Engineering, Univ. Nebraska - Lincoln
jp@unl.edu

unsubscribe ethomas

Dear Subscribers,

I am a soil chemist/microbiologist currently looking at
hydrocarbon biodegradation in soil and would appreciate some help
with a "burning question".

The particular soil we have been investigating has a 4% (g/g)
total petroleum hydrocarbon concentration which ranges from C10
to C40 hydrocarbons. We have been using a simple (and rather
crude) index method based on gas chromatography analyses (without
mass spec, unfortunately) to determine biodegradation. The
method is based on the relative decrease in concentrations of
compounds with shorter GC retention times than a C20 alkane
marker as compared to those with longer GC retention times.
Although I believe a C30 alkane to be a better cutoff point for
this purpose, there are not enough compounds in the >C30 region
to make use of this cutoff point. We have found the index to be
a relatively good indicator of biodegradation and is more
sensitive than total hydrocarbon concentration determinations.
What we have found is that the concentration relative to the >C20 hydrocarbons as biodegradation
progresses. (Of course one has to account for washout of the
lower hydrocarbons.)

Some researchers at another institution have recently tested this
method and have found the opposite i.e. the concentrations of
<C20 hydrocarbons increased relative to the >C20 hydrocarbons.
They claim this to occur due to the catabolism of larger
hydrocarbons with subsequent increase of lower hydrocarbons.
Although this is true these lower hydrocarbons should be more
rapidly degraded than they are produced. Their results,
therefore, imply that the microbial degradation of higher
hydrocarbons occurs at a faster rate than degradation of lower
carbons - which seems almost impossible. Can anyone give some
advice on this matter?

Thanks in advance

Chris du Plessis

Email: duplessis@agron.unp.ac.za
Fax: 27 331 2605426

Department of Agronomy
University of Natal
P/B X01 Scottsville 3209
South Africa

Reply to: RE>Conservation Tillage Info?

You might try to contact the Biotechnology Info Center at the National Ag
Library at biotech@nalusda.gov. They have a new bibliography entitled
'Biotechnology and Sustainable Agriculture: A Bibliography' available at
gopher.nalusda.gov or via WWW at
http://www.inform.umd.edu/EdRes/Topic/AgrEnv/Biotech. Hope that helps.

Cheers,
Ted Zobeck
tzobeck@lubbock.ars.ag.gov
------------------------------
Date: 2/28/95 2:49 PM
To: Zobeck, Ted
From: soils-l@unl.edu

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From: AGPR@aol.com
To: Multiple recipients of list <soils-l@unl.edu>
Subject: Conservation Tillage Info?

I have a farmer friend looking for conservation tillage information available
on Internet. What suggestions might members of the soils-l listserv offer?

Thanks in advance for your assistance.

Best wishes...

Warren E. Clark, President
Clark Consulting International, Inc.
14N921 Lac Du Beatrice
West Dundee, IL 60118-3115
Tel: 708-836-5100; Fax: 708-836-5140; AOL: AgPR; Internet: AgPR@aol.com
Check out our CCI, Inc. Internet Homepage at:
http://www.interaccess.com/users/ag-pr/index.html
**Providing worldwide agricultural/food, editorial, public relations, and
marketing services consulting**

P.S. If you know any ag or food writers on Internet who like research,
writing and editing, please let them know we'd like to talk with them about
becoming part of our growing worldwide network of on-line freelance
writers... Thanks.

unsubscribe jan mueller

Greetings,

I would like to obtain information from soil physicists, engineers, unsaturated
zone hydrologists, and other interested scientists on the list.

I have my own viewpoints considering the following topic and would be happy
to share it with interested parties. However, to avoid incumberment of
list, please respond directly to me. I will keep all replies anonymous
if desired, but will summarize all replies by region and give this
summary to any and all interested scientists.

My questions are these: 1) What do you perceive to be the three hottest topics
of research in your region (i.e., southeast, northeast, midwest, etc.)?
2) How do you percieve these topics changing in the next 5-10 years? 3) How
does your topic relate to important national interests in vadose zone
transport and other fields? 4) How does your research topic relate to other
surface and groundwater interests concerning agriculture, industry, and the
private sector?

I am asking by region because topics in one region may not be as high a
priority in another due to climate, topography, etc. For example, in some of
our projects in the midwest we are more concerned with preferential flowpaths
and their effects on the transport of agricultural chemicals while here in
Denver we are more concerned with transport of industrial solvents and other
chemicals. However, many here are interested in ag chemicals, infiltration,
etc.

Thanks in advance for your replies.

James A. Tindall, Ph.D.
Soil Physicist
National Research Program
U.S. Geological Survey
Denver, Colorado 80225
Ph. (303) 236-5005

Are you addressing USA regions only ??
^^^ ^^^^
---
----------------------------------------------------------------------------
Carlos Sequeira Institute for Water Management, Hydrology
IWHW-BOKU & Hydraulic Engineering (IWHW)
Nussdorfer Laende 11 Univ. of Natural Resources Management (BOKU)
A-1190 Vienna / AUSTRIA "Alma Mater Viridis"
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --
cseque@donau.boku.ac.at Tel. 43-1-3692924-371 Fax 43-1-3692924-350
----------------------------------------------------------------------------

> From: "JAMES A. TINDALL, Hydrologist, Lakewood, CO "<jtindall@wrdmail.er.usgs.gov> (Jim Tindall)
> Subject: Regional Researh Topics
[...]

> My questions are these: 1) What do you perceive to be the three hottest topics
> of research in your region (i.e., southeast, northeast, midwest, etc.)?

[...] topics in one region may not be as high a
> priority in another due to climate, topography, etc. For example, in some of
> our projects in the midwest we are more concerned with preferential flowpaths
> and their effects on the transport of agricultural chemicals while here in
> Denver we are more concerned with [...]
A
>

Greetings,

I am trying to compile information from soil physicists, unsaturated zone
hydrologists, engineers, etc. about burning research topics of regional
and national interest.

Specifically, what are some of the burning present and future research
topics on a regional scale across the United States. We want regional
because many of the problems in each region are sometimes specific to
geography, topography, climate, etc. For example, on some of our projects
in the midwest in well structured clays we are investigating transport
parameters induced by macropores on herbicides, nitrates, and ag. chemicals.
Here in the west we are more concerned about volatile organic carbons caused
from industrial spills, bioremediation of the vadose zone, and various
aspects of modelling concerning these topics. Although other scientists
in agriculture are also interested in macropores, infiltration, evaporation,
and a host of other topics.

Thus, my questions are: 1) What are the three greatest areas of interest in
vadose zone research for your region (southeast, northeast, northwest, southwest,
central, midwest, and upper midwest U.S.)? 2) What do you percieve the focus
of this research to be over the next 5-10 years? 3) What portions of the
research do you believe will have or deserve a national focus? 4) How will the
research blend with saturated zone topics, industry, agriculture, and the
private sector?

I already have my own views concerning some of these and would be glad to share
them with interested parties.

You can respond directly to me to avoid incumberment of the soils list.
I will summarize all the comments received by region, keep anonymity intact
if desired, and distribute to those interested on the list.

Thanks in advance for your assistance.

James A. Tindall, Ph.D.
Soil Physicist
National Research Program
U.S. Geological Survey
Denver, Colorado 80225-0046
Ph. (303) 236-5005

Hi everybody
I am working on compost effect in decreasing soil evaporation . What is
the most effective device for decreasing evaporation or
evapotranspiration in arid and semi-arid regions and what is the most
advanced computeral program simulating soil-water-atmosphere continum
considering all concerning aspects as ground water table , soil strata
and plant spicies as well as amendments contributions .

Ali Movahedi

Research Student
Wye College
University of London
UK

Test message....

unsubribe soils-l@unl.edu

I own rural property, and am investigating cooperating with the US Forest
Service and Fish and Wildlife service in a program that would employ
and retrain "workers in the woods" to do watershed restoration.

First draft idea is to kill off invasives
-- tall oat grass
-- cheat grass

Possible means include: herbicides, spot or broadcast
nitrogen fertilization and tilling
repeated mechanical tilling
hand weeding
flame weeding
black plastic covering

Soil prep would happen between now and fall '95, then the areas would be
planted with native grasses, locally collected seeds grown into plugs at
a nursery over the summer

Result would be harvestable plots of pure native grasses, from which seed
could be gathered for further restoration.

Clearly I need advice and help; there are multiple goals we'll be sorting out.
This is Northern California, 5000' elevation, in an area that's lost probably
two feet of topsoil in this century; scrub oak, pines, manzanita and grasses.
I have good road access and water. I'd like to do this as a multifactorial
research design, if I can find a researcher! to help plan and use the work,
and am looking for discussion and advice; several months remain for discussion
before any commitments will be made.
---> hank@well.com (preferred) or hank@netcom.com; please mail so as not to
---> fill list readers' mailboxes, I will summarize and reply to everyone.
:b hank

Greetings to soils-l subscribers,

I work for the Canadian Forest Service in Prince George, B.C. as a soil
scientist specializing in forest site productivity. I would like to pose the
following question to soils-l subscribers:

What beneficial, detrimental, or other effects are associated with the use of
woody residues as soil amendments?

The particular problem I have in mind is for reclaiming degraded (nutrient
depleted and compacted) forest soils on roads and landings, but any
information related to the following would help:

decomposition rates of chipped woody materials in soil
N dynamics of woody residue amendments
application methods (mulching vs. incorporation)
application rates
effect of different species / particle size

If you know of literature, work in progress, etc., I would appreciate hearing
from you.

Thanks,

Chuck Bulmer
Research Scientist
Canadian Forest Service
Prince George, British Columbia
CBULMER@a1.pfc.forestry.ca

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From: "C.E. (Chuck) Bulmer 1-604-963-2206" <CBULMER@a1.pfc.forestry.ca>
To: Multiple recipients of list <soils-l@unl.edu>
Subject: wood residues in soils

Greetings to soils-l subscribers,

I work for the Canadian Forest Service in Prince George, B.C. as a soil
scientist specializing in forest site productivity. I would like to pose the
following question to soils-l subscribers:

What beneficial, detrimental, or other effects are associated with the use of
woody residues as soil amendments?

The particular problem I have in mind is for reclaiming degraded (nutrient
depleted and compacted) forest soils on roads and landings, but any
information related to the following would help:

decomposition rates of chipped woody materials in soil
N dynamics of woody residue amendments
application methods (mulching vs. incorporation)
application rates
effect of different species / particle size

If you know of literature, work in progress, etc., I would appreciate hearing
from you.

Thanks,

Chuck Bulmer
Research Scientist
Canadian Forest Service
Prince George, British Columbia
CBULMER@a1.pfc.forestry.ca

Dr. Gerrit Hoogenboom | Dept. of Biol. and Agric. Eng.
Assistant Professor | Georgia Station
Internet : GHOOGEN @ | The University of Georgia
GAES.GRIFFIN.PEACHNET.EDU | Griffin, Georgia 30223-1797 USA
PHONE: (404)-228-7216
FAX: (404) 228-7218

> Subject: wood residues in soils
>
> Greetings to soils-l subscribers,
>
> I work for the Canadian Forest Service in Prince George, B.C. as a soil
> scientist specializing in forest site productivity. I would like to pose the
> following question to soils-l subscribers:

You should talk to Jeff Baldock, PNFI Chalk River, Ontario
(I dont know if he would want his email broadcast or not, so
if you send me email I will forward it for you)

and
Caroline Preston, CFS. Victoria BC, both of whom
are soil scientists actively working in soil organic matter
inputs and decomposition processes. Look in the recent
literature (I can send or post refs if requested).

> What beneficial, detrimental, or other effects are associated with the use of
> woody residues as soil amendments?

As tends to be the case for anything in soil, anything and everything can be assoc
with woody residues in soils, just in differing amounts. ;-)
Seriuosly though the impact of woody tissue lignins can affect
microbial soil populations, (increased fungal over bacterial population)
due to the inhibitory affects of these lignic materials. May affect DOC
such as dark colours stream water (melanoidins, etc).

> The particular problem I have in mind is for reclaiming degraded (nutrient
> depleted and compacted) forest soils on roads and landings, but any
> information related to the following would help:
>
> decomposition rates of chipped woody materials in soil
variable (of course), depends on oxic/anoxic condition, mineralogy
biota quality and quantity, water content, ...

> N dynamics of woody residue amendments
Carolyn Preston should have a paper out in "Geoderma" later this year
on this very issue.

> application methods (mulching vs. incorporation)
We are working on some very similar stuff

> application rates
> effect of different species / particle size
Probably the dominant influences^^^ and ^^^ both affecting decomposition rates
>
> If you know of literature, work in progress, etc., I would appreciate hearing
> from you.

Hope that helps
Philip

--
Dr. Philip Clarke, Department of Soil Science
Waite Solid State NMR Facility, University of Adelaide
P.M.B. 1, Glen Osmond, South Australia,Australia, 5064
Ph/Fax (0)8 303 7399 pclarke@waite.adelaide.edu.au

Dear List Reader :

A DSSAT list server has been established through the efforts of
Dr. Gerrit Hoogenboom, University of Georgia, Griffin to serve users and
those interested in DSSAT and the crop models contained therein. For
the record, the following crop models are currently accessible under the
DSSAT shell. They include the CERES family of models for maize, wheat,
rice, barley, sorghum, and millet; the CROPGRO series of models--SOYGRO
(soybeans), PNUTGRO (peanut/groundnut), and BEANGRO (dry beans); and the
root crop models, CROPSIM-cassava and SUBSTOR-potato.

We trust this mode of communication will allow each user to share
concerns, successes, messages, and thoughts related to DSSAT and its
application. Additionally, information on updates and modifications will
be announced here as well as through conventional means.

Instructions to subscribe follows:

To subscribe, send a message to: listserv@uga.cc.uga.edu

in the body of the message state : subscribe DSSAT
Firstname Lastname.

Dr. Hoogenboom will serve as "caretaker" of the listserver.

We look forward to meeting you on the "net".

Gordon Y. Tsuji
ibsnat@uhunix.uhcc.hawaii.edu

Dear friends,

Let me introduce myself.
My name is Sandra Novak and I study in Nancy, a city in the East of
France.I am graduate in environmental sciences and I study pedology this
year (the diplom is called a "DEA" in France and is requirred to do a
thesis).I' m now at the training period and I do a work on the transfer
from two herbicids (atrazine and isoproturon) into a calcareous soil to the
groundwater.
My burning questions would be : does someone of the list work on a similar
subject ?
and : does someone know litterature's references about the fate of
pesticides in calcareous soils?
and the last (but not least) thing : I would be interested in a thesis
concerning soils' pollution.

I hope you would be so nice to give me some answers.

Sandra.
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