AGMODELS-L: 199510XX
is the compilation of discussion during Oct 95
via AB4EL Web Digests @ SunSITE
>From root@crcnis1.unl.edu Sun Oct 1 03:16 EDT 1995
Date: Sun, 1 Oct 1995 02:03:46 -0500
Message-Id: <199510010703.AA26585@crcnis1.unl.edu>
Subject: AGMODELS-L digest 365
Contents:
Re: Introduction ("Stephen L. Rawlins" <srawlins@beta.tricity.wsu.edu>)
Date: Sat, 30 Sep 1995 05:52:42 -0700 (PDT)
From: "Stephen L. Rawlins" <srawlins@beta.tricity.wsu.edu>
Subject: Re: Introduction
I'm Steve Rawlins, a long time lurker on this discussion group, but I
have not yet introduced myself. Like John Sadler, I'm involved in
precision farming, and have an interest in the use of simulation models
linked with GIS for developing prescriptions for variable rate inputs.
Shufeng Han, Tom Hodges and I have a paper on linking Simpotato, a Ceres
model for potato, with ArcInfo. I'll post this and some other references
later.
As of today I am a retired ARS Scientist, but will be actively involved
in precison farming through my affiliatlon with Washington State
University, and through some private consulting activities.
End of Digest
>From root@crcnis1.unl.edu Mon Oct 2 03:17 EDT 1995
Date: Mon, 2 Oct 1995 02:03:58 -0500
Message-Id: <199510020703.AA13031@crcnis1.unl.edu>
Subject: AGMODELS-L digest 366
Contents:
Re: Lurking Questionnaire. (Graham Russell <GRUSSELL@srv0.bio.ed.ac.uk>)
Date: Sun, 1 Oct 1995 10:33:21 +0000
From: Graham Russell <GRUSSELL@srv0.bio.ed.ac.uk>
Subject: Re: Lurking Questionnaire.
> Question 1: What are your feelings regarding the phenomenon of
> "lurking" on bulletin boards?
I have no difficulty in people lurking provided that they
do not take information from the board and use it without
crediting the originators. I am sure that many lurkers do
not contribute because they feel that what they have to
contribute is not good/accurate enough. Some lurkers are
future contributors. It is just that they have not been
asked the right question yet.
> Question 2: What benefits do you associate with "lurking" on
> a bulletin board?
Finding out information about subjects I know little about
> Question 3: What detriments do you associate with "lurking"
> on a bulletin board?
lots of unwanted email messages!
> Question 4: Are there any similarities between your willingness to
> communicate with others in person and your willingness to
> to post a message on a bulletin board?
Yes, I guess so. I guess that the main difference is the
opportunity to communicate with lots of people.
Graham Russell
Dr G. Russell
University of Edinburgh
Institute of Ecology & Resource Management (Agriculture Building)
West Mains Road
Edinburgh EH9 3JG
SCOTLAND
International phone +44 131 535 4063 Fax +44 131 667 2601
UK phone 031 535 4063 Fax 031 667 2601
End of Digest
>From root@crcnis1.unl.edu Tue Oct 3 03:17 EDT 1995
Date: Tue, 3 Oct 1995 02:05:23 -0500
Message-Id: <199510030705.AA16293@crcnis1.unl.edu>
Subject: AGMODELS-L digest 367
Contents:
RE: Ag. Financial Mgt. & Software (xgrover@vt.edu (Gordon E. Groover))
RE: Lurking questionnaire (c.g.parker@lut.ac.uk (Caroline Parker))
salinity discussion list (rsoppe@cati.csufresno.edu (Richard Soppe))
Date: Mon, 2 Oct 1995 08:42:56 -0400
From: xgrover@vt.edu (Gordon E. Groover)
Subject: RE: Ag. Financial Mgt. & Software
>Gordon:
>
>Is the video conference being broadcast via satelite? If so what is the
>time, date and satelite coordinates, etc. Is there a charge for the
>conference (worksohop)?
To subscribe to the farm-records listserv send e-mail to:
listserv@listserv.vt.edu
In the body of the e-mail message, type:
subscribe farm-records Your_Name
where "Your_Name" is your name, not computer id. The Listserv at Va Tech
will respond
with a message to your computer ID requesting confirmation that you want to
be added to
the list. After confirming this request you will be added to the list and
can begin sending
and receiving messages.
The purpose of the farm-records listserv is to provide a forum for
questions, answers, and
discussion of all aspects of using and teaching farm financial and
production records. Please,
view this forum as a place to interact with your fellow educators and
participants in the
AG*SAT conference to improve our knowledge of farm-level records and their
use in day-to-
day management.
If you have questions about the Farm-Records Listserv please contact: Gordon
Groover at
xgrover@vt.edu.
Gordon E. Groover
Extension Economist Farm Management
Department Agriculture and Applied Economics
Va. Tech
Blacksburg, Va. 24061-0401
Phone: 540-231-5850 Fax: 540-231-7417
INTERNET: xgrover@vt.edu
Date: Mon, 2 Oct 95 15:50:32 bst
From: c.g.parker@lut.ac.uk (Caroline Parker)
Subject: RE: Lurking questionnaire
Apologies for sending this to the whole list - I've lost the original email.
> Question 1: What are your feelings regarding the phenomenon of
> "lurking" on bulletin boards?
I think most people are lurkers most of the time! Shyness has a lot to do
with it I think.
> Question 2: What benefits do you associate with "lurking" on
> a bulletin board?
=46inding out answers to questions I had never considered asking.
> Question 3: What detriments do you associate with "lurking"
> on a bulletin board?
Sifting through the email to find the interesting bits.
> Question 4: Are there any similarities between your willingness to
> communicate with others in person and your willingness to
> to post a message on a bulletin board?
There are similarities to using the telephone but not to speaking face to
face. The pressure to prepare a question/response which will not offend
anyone is greater on email. There is also the inhibiting prospect of
making a fool of yourself in front of a lot of people! However email makes
it easier to reply to an individual, conversations tend not to be hampered
by status.
Caroline
**=AB=BB**=AB=BB**=AB=BB**=AB=BB**=AB=BB**=AB=BB**=AB=BB**
Caroline Parker
Principal Project Officer
HUSAT Research Institute
Loughborough University
Tel: +1509 611088
=46ax: +1509 234651
**=AB=BB**=AB=BB**=AB=BB**=AB=BB**=AB=BB**=AB=BB**=AB=BB**
Date: Mon, 2 Oct 1995 18:17:18 -0700
From: rsoppe@cati.csufresno.edu (Richard Soppe)
Subject: salinity discussion list
The USDA-ARS-Water Management Research Laboratory, Fresno CA, would
like to announce the creation of another E-mail discussion list: SALINITY-L
Salinity-L focuses on discussions related to salt management in relation
to irrigation and drainage. The list has just been created and will include
discussions about irrigation management to solve salinity problems, drainage
management, load-flow relations, soil hydraulic properties as influenced by
salts, crop tolerances to salt and more.
To subscribe to the list, send an E-mail message to
LISTSERV@UNL.EDU
With in the body the following lines:
SUBSCRIBE SALINITY-L FirstName LastName
Where FirstName LastName are your real names.
For more information, contact Richard Soppe or Richard Mead at:
Water Management Research Laboratory
U.S. Department of Agriculture
Agricultural Research Service
2021 South Peach Avenue
Fresno, CA 93727-5951
phone: (209)453-3100
fax: (209)453-3122
E-mail: RSoppe@asrr.arsusda.gov
E-mail: RMead@asrr.arsusda.gov
WWW: http://asset.arsusda.gov/WMRL/WMRL.html
End of Digest
>From root@crcnis1.unl.edu Wed Oct 4 15:32 EDT 1995
Date: Wed, 4 Oct 1995 14:19:55 -0500
Message-Id: <199510041919.AA00646@crcnis1.unl.edu>
Subject: AGMODELS-L digest 368
Contents:
Re: Lurking Questionnaire. ("Rabi H. Mohtar" <RHM8@PSUVM.PSU.EDU>)
Date: Wed, 4 Oct 95 13:40 EDT
From: "Rabi H. Mohtar" <RHM8@PSUVM.PSU.EDU>
Subject: Re: Lurking Questionnaire.
I would like to note that the word "lurking" is not appropriate for the inactiv
e or silent members in this or any other list.
Many of the lists have several hundred members and I do not think we should exp
ect all of the members to be "vocal". Some are shy because of the lack of know
ledge and are there to learn. Still many others do not access their mail daily
so by the time they get to it there are already someone who responded to the p
osed question. And still those of us who respond to the person directly hoping
that the person who posed the question will compile a list of responses and po
st them on the list.
I go back to the scenario of room discussion, only few participant usually gene
rate the bulk of the discussion. Do we call those "lurkers"?
Regards,
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 Thu Oct 5 15:33 EDT 1995
Date: Thu, 5 Oct 1995 14:21:07 -0500
Message-Id: <199510051921.AA05840@crcnis1.unl.edu>
Subject: AGMODELS-L digest 369
Contents:
Re: Lurking Questionnaire. (Zaitao Pan <panz@iastate.edu>)
Re: Lurking Questionnaire. (tomas@barran.biocom.com (tomas))
Date: Wed, 04 Oct 1995 14:16:58 CDT
From: Zaitao Pan <panz@iastate.edu>
Subject: Re: Lurking Questionnaire.
Question 1: What are your feelings regarding the phenomenon of
"lurking" on bulletin boards?
A: My English is not good, but it sounds like negative. I think lurking
is rather normal at this information era.
Question 2: What benefits do you associate with "lurking" on
a bulletin board?
A: Learn things out but related to your area.
Question 3: What detriments do you associate with "lurking"
on a bulletin board?
A: For later use. Right now I 'm not work on agronomy yet, but I will
a few month from now.
Question 4: Are there any similarities between your willingness to
communicate with others in person and your willingness to
to post a message on a bulletin board?
A: Sometimes, I'm afraid too many responses will disturb others in the
sense that people have to read it and delete it. and it occupies disk
space too.
Zaitao Pan
Iowa State Univ.
Date: Wed, 04 Oct 95 23:25:39 PDT
From: tomas@barran.biocom.com (tomas)
Subject: Re: Lurking Questionnaire.
Somebody please tell me what's these questions purpose. Do I have to
answer them or can I remain as a "lurker"?
Thanks,
Tomas Barrandeguy. e-mail: tomas@barran.biocom.com
End of Digest
>From root@crcnis1.unl.edu Fri Oct 6 15:34 EDT 1995
Date: Fri, 6 Oct 1995 14:20:58 -0500
Message-Id: <199510061920.AA02384@crcnis1.unl.edu>
Subject: AGMODELS-L digest 370
Contents:
sensitivity on CERES-WHEAT ("T.MAVROMATIS" <T.Mavromatis@uea.ac.uk>)
Re: Lurking Questionnaire. (Daniel Fuka <dan@quetzalcoatl.com>)
Re: sensitivity on CERES-WHEAT (mike@arrc.ncsu.edu (Mike Munster))
Re: sensitivity on CERES-WHEAT (griggs@brcsun0.tamu.edu)
Re: sensitivity on CERES-WHEAT (mike@arrc.ncsu.edu (Mike Munster))
Date: Thu, 05 Oct 1995 23:36:09 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
Date: Thu, 5 Oct 1995 17:17:07 -0600
From: Daniel Fuka <dan@quetzalcoatl.com>
Subject: Re: Lurking Questionnaire.
Howdy,
I guess since I was the person with the most negative response to
this questionaire, maybe I should offer some of my thoughts to this
discussion one last time.
I think that if a person asks a question on a list that I can give
an answer to, then it is my obligation to give the answer. This is
unless an answer has already been answered in a manor in which I
agree with. If I have not checked my mail in some time and find that
there has been a discussion on a topic in which I feel that I am
qualified to speak, and my opinion has not been addressed, I feel that
I am still obligated to give it directly to the person who presented
it if not the whole group. I think that this is only right since
I am obtaining a large amount of information from the group.
If I know little about the subject, or the question has been answered
already and I agree with, then there is no point in me contributing. If
there are multiple opinions, then I could easily support one or the
other with less than 10 seconds of my life wasted by just saying that
I support one side or another. A minute would be taken if I wanted to
add a reference that I had in the back of my head. This is not a great
amount of time to dedicate to a group that provides such a huge resource
of human knowledge to me.
I think that all members of the list are responsible to give their opinion
on issues that they are knowledgeable in. Especially now when it is becoming
more popular to utilize list discussions as references in professional
journals and in proposals. What we have here is the ability to access
information and ideas real time, with no lag while waiting for the journal
to be published. If a discussion is referenced, then many will believe
that the resulting opinions are that of the members of the list. When
I review an article or a proposal and see a reference to a list, I retrieve
the archive for the list from that period to see if it is a valid reference.
I also pull down the list membership to see who the members are. This list
represents some pretty influential people in the agricultural modeling
fields, if they are participating in a discussion (either listening or
adding opinions) then I would consider any opinions that are addressed
a full summary of the entire groups opinions. I know that this is fairly
harsh, but I think that by having your name associated as a member of
any professional group, club, political party, or list in this case,
you are responsible for the views of that organization, be it the KKK,
Democratic, Green, or Republican parties, or agmodels-l. You must
remember that your name, and more informative, your email address are
available to anyone out there who wants to see who is on the list.
One other thing that I would like to address. I think that when a
question is asked to the list, it should be well thought out, with
a little back ground and asking a straight forward question(s). This
allows the group to see what research is presently being done, as
well as helps people to understand the questions. This does not
mean that the posting has to be long, just a few sentences describing
the background of the problem or what brought about the questions.
I guess that this has wasted enough peoples time, back to modeling.
If anyone would like to discuss this "outside" the list, I would be
happy to. I imagine that people might be getting sick of this
string, and it might be best to move it outside the list so as
to not upset anybody trying to get any research accomplished.
Dan
dan@quetzalcoatl.com
My opinions may or may not reflect the opinions of my employer.
Date: Fri, 6 Oct 95 12:19:53 EDT
From: mike@arrc.ncsu.edu (Mike Munster)
Subject: Re: sensitivity on CERES-WHEAT
Theodorus:
I cannot speak specifically to CERES-WHEAT, but I can tell you about
the sensitivity analysis that we are doing here. We are trying to use
the EPIC model to "subtract" differences due to variation in climate
and soil. We expect that such an adjustment will allow more powerful
detection of yield trends and may allow underlying ecological
differences to emerge in regional studies.
But of course there is uncertainty in those inputs, and we don't know
how big that uncertainty is in relation to the differences we are
trying to detect. Thus the need for sensitivity analysis.
We are modeling yields for a number of maize fields across Nebraska USA
(actual yield data obtained in 1993). We used aerial photos and soil
survey maps to estimate the proportion of each field that was occupied
by each soil map unit. The map unit gives us the soil series. To look
at variability due to soil information, we take the subset of fields
that each have just one kind of soil throughout. (This is of course
a simplification of the reality in the field). Then we will run the
model with three different sets of soil parameters. One set is that
provided with EPIC for that soil. If the particular soil is not
available in the EPIC list, then we use data from a related soil. Data
for the other two runs come from the U.S. Department of Agriculture's
National Resources Conservation Service (formerly the Soil Conservation
Service). They have a characterization database for many many of the
soils in the U.S., and multiple examples of quite a few of them. With
this data source, we picked out just the most critical variables: %sand,
%silt, organic matter, bulk density, and pH. This information is
available by horizon (layer).
After running the model we will compare the field-to-field variability
with the variability due to soil data inputs.
This approach is different from another kind of sensitivity analysis,
where you vary parameters one at a time within some arbitrary range.
The advantage (we hope!) is that it allows a comparison of realistic
uncertainties.
If you want to know more and are going to be at the upcoming
Agronomy/Soils meetings in St. Louis, stop by and see our poster on
Tuesday 31 October.
-=|Mike|=-
Date: Fri, 6 Oct 1995 12:02:15 -0500
From: griggs@brcsun0.tamu.edu
Subject: Re: sensitivity on CERES-WHEAT
Mike,
I agree with your comments and approach and want to make sure that you are
aware that database tools exist that contain all of the SCS soils for the
US in EPIC format. CMSOIL and other tools for EPIC are available through
Georgie Mitchell at the Blackland Research Center in Temple, TX , email
mitchell@brcsun0.tamu.edu
Thanks again for your suggestions,
Ray H. Griggs
>Theodorus:
>
>I cannot speak specifically to CERES-WHEAT, but I can tell you about
>the sensitivity analysis that we are doing here. We are trying to use
>the EPIC model to "subtract" differences due to variation in climate
>and soil. We expect that such an adjustment will allow more powerful
>detection of yield trends and may allow underlying ecological
>differences to emerge in regional studies.
>
>But of course there is uncertainty in those inputs, and we don't know
>how big that uncertainty is in relation to the differences we are
>trying to detect. Thus the need for sensitivity analysis.
>
>We are modeling yields for a number of maize fields across Nebraska USA
>(actual yield data obtained in 1993). We used aerial photos and soil
>survey maps to estimate the proportion of each field that was occupied
>by each soil map unit. The map unit gives us the soil series. To look
>at variability due to soil information, we take the subset of fields
>that each have just one kind of soil throughout. (This is of course
>a simplification of the reality in the field). Then we will run the
>model with three different sets of soil parameters. One set is that
>provided with EPIC for that soil. If the particular soil is not
>available in the EPIC list, then we use data from a related soil. Data
>for the other two runs come from the U.S. Department of Agriculture's
>National Resources Conservation Service (formerly the Soil Conservation
>Service). They have a characterization database for many many of the
>soils in the U.S., and multiple examples of quite a few of them. With
>this data source, we picked out just the most critical variables: %sand,
>%silt, organic matter, bulk density, and pH. This information is
>available by horizon (layer).
>
>After running the model we will compare the field-to-field variability
>with the variability due to soil data inputs.
>
>This approach is different from another kind of sensitivity analysis,
>where you vary parameters one at a time within some arbitrary range.
>The advantage (we hope!) is that it allows a comparison of realistic
>uncertainties.
>
>If you want to know more and are going to be at the upcoming
>Agronomy/Soils meetings in St. Louis, stop by and see our poster on
>Tuesday 31 October.
>
>-=|Mike|=-
Date: Fri, 6 Oct 95 13:37:37 EDT
From: mike@arrc.ncsu.edu (Mike Munster)
Subject: Re: sensitivity on CERES-WHEAT
Ray:
Thanks for that message and for your earlier
help in getting started. I did _not_ know that
those SCS soils were available in EPIC format.
Would have saved me a bit of time. Also, by
seeing your reply I realized that there wasn't
enough information to those who might want to
visit the poster in St. Louis. It is
M.J. Munster and G.B. Dhakhwa
Reducing noise in regional or time-series
yield data by means of crop simulation models.
-=|Mike|=-
<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>
| MR. MICHAEL J. MUNSTER |
<> EMAP-Agricultural Lands phone 919-515-3311 <>
| 1509 Varsity Dr. fax 919-515-3593 |
<> Raleigh, NC 27606 email mike_munster@ncsu.edu <>
| USA |
<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>-<>
> From root@crcnis1.unl.edu Fri Oct 6 13:19:21 1995
> Date: Fri, 6 Oct 1995 11:56:04 -0500
> Originator: agmodels-l@unl.edu
> Reply-To: <agmodels-l@unl.edu>
> Sender: agmodels-l@unl.edu
> Version: 5.5 -- Copyright (c) 1991/92, Anastasios Kotsikonas
> From: griggs@brcsun0.tamu.edu
> To: Multiple recipients of list <agmodels-l@unl.edu>
> Subject: Re: sensitivity on CERES-WHEAT
> Content-Length: 2670
>
> Mike,
> I agree with your comments and approach and want to make sure that you are
> aware that database tools exist that contain all of the SCS soils for the
> US in EPIC format. CMSOIL and other tools for EPIC are available through
> Georgie Mitchell at the Blackland Research Center in Temple, TX , email
> mitchell@brcsun0.tamu.edu
> Thanks again for your suggestions,
> Ray H. Griggs
End of Digest
>From root@crcnis1.unl.edu Sat Oct 7 16:29 EDT 1995
Date: Sat, 7 Oct 1995 15:16:44 -0500
Message-Id: <199510072016.AA18453@crcnis1.unl.edu>
Subject: AGMODELS-L digest 371
Contents:
More on "lurking" (ALBERT WEISS <AGME011@UNLVM.UNL.EDU>)
Date: Sat, 07 Oct 95 14:48:25 CDT
From: ALBERT WEISS <AGME011@UNLVM.UNL.EDU>
Subject: More on "lurking"
To me, "lurking" has a negative connotation, it is a sinister type of term.
For example," The villain lurked in the shadows waiting for his next victim. "
I prefer the term "active" or "passive participant". One can be a passive
participant but yet be intellectually active.
My perspective is that time dictates how active or passive one will be with
regards to responding to posted questions or comments. It seems that many
of us have to juggle several projects almost simultaneously. If something
is of indirect interest, we may note it and remain passive. If something
touches a hot button, then we should respond.
Albert Weiss
ALBERT WEISS, DEPT. OF AGRICULTURAL METEOROLOGY
UNIVERSITY OF NEBRASKA-LINCOLN, LINCOLN,NE 68583-0728
VOICE (402)472-6761, FAX (402)472-6614
E-MAIL AGME011@UNLVM.UNL.EDU
End of Digest
>From root@crcnis1.unl.edu Sun Oct 8 16:30 EDT 1995
Date: Sun, 8 Oct 1995 15:17:05 -0500
Message-Id: <199510082017.AA25713@crcnis1.unl.edu>
Subject: AGMODELS-L digest 372
Contents:
("Manuel Arroyo D.T.I Profesor" <marroyo@abello.dic.uchile.cl>)
Date: Sat, 7 Oct 1995 17:26:57 -0300 (ADT)
From: "Manuel Arroyo D.T.I Profesor" <marroyo@abello.dic.uchile.cl>
Subject:
Dear listers,
My name is Manuel Arroyo, <marroyo@abello.dic.uchile.cl>, and I would
like to introduce myself to the list.
I am an Agricultural Economist coordinating the Arid Land Program of
Research at Universidad de Chile. Our main interests are arid land
sciences related to research results for natural resources and
environmental management.
Sincerely,
Manuel Arroyo
End of Digest
>From root@crcnis1.unl.edu Mon Oct 9 16:33 EDT 1995
Date: Mon, 9 Oct 1995 15:19:25 -0500
Message-Id: <199510092019.AA10569@crcnis1.unl.edu>
Subject: AGMODELS-L digest 373
Contents:
Re: sensitivity on CERES-WHEAT (gabriele@bcgn.grignon.inra.fr (Benoit Gabriele))
"lurking" - the word (wstites@fsmail.uwsp.edu)
"lurking" - the word (wstites@fsmail.uwsp.edu)
Date: Mon, 9 Oct 1995 09:14:46 GMT
From: gabriele@bcgn.grignon.inra.fr (Benoit Gabriele)
Subject: Re: sensitivity on CERES-WHEAT
Dear Theodoros,
I am also working on a Ph.D., dealing with the assessment of
crops' environmental impacts with the CERES models (I am
concerned with nitrogen losses, essentially). I thought I could
help you as regards your questions on the sensitivity of CERES
to soil inputs.
Maybe you could precise which is your objective in checking the
sensitivity of your model? If you are interested in the effect of
nitrogen fertilising (timing and amount) on the wheat yields attained in France,
you should try, as Mike Munster suggested, to simulate a variety of soil
and climate situations to uncouple the effects of
these sources of variability from that due to nitrogen management.
I can provide you with some CERES files for typical french soils,
in that case.
On the other hand, you may wish to assess the influence of the variability
in the soil parameters on the simulated yield, for a given soil type.
This variability stems from spatial heterogeneity within a field of
those paramaters, or from the range they may take in a given soil class.
For the first point, I have conducted a simple, uni-dimensional analysis
as regards the simulation of the soil water balance, from which you
could pick ranges for the parameters' variations (the reference is
Soil Sci. Soc. Am. J. 1995. 59:1402-1411).
For the second point, you may refer to the approach proposed by
Mike Munster; I guess you could obtain from the EPIC soil data base
some ranges of variations of soil parameters within a soil class.
I hope this sort of qualifies as a response to you,
Benoit Gabrielle
INRA Bioclimatologie
78850 Thiverval-Grignon
France
Date: Mon Oct 9 10:57:33 CDT 1995
From: wstites@fsmail.uwsp.edu
Subject: "lurking" - the word
In reply to the complaint that "lurking" is not an appropriate term for
reading but not contributing to lists:
I agree that the word "lurk", with its negative connotations, is not rightly
applied to those who read lists for the purpose of self-education.
However, it is a well established usage in this environment, and is just
one of the wry words computer "geeks" apply to themselves. (The term "geek"
is another example.)
Freddy Krueger lurking in the woods: bad.
Rabi Mohtar "lurking" on agmodels-L: good.
Regarding Daniel Fuka's comments, I disagree partially, although he had a
number of good points. I do not think anyone can assume members of a list
either will speak up or else must agree with the viewpoints that appear.
Perhaps there is some justification for thinking they have a duty to speak
up, but it goes too far to expect they always will. And I strongly disagree
that "membership" in a list is like membership in a political party or the
KKK, as Mr. Fuka opined. For example, any interest group list would certainly
be monitored by persons with opposite interests.
Will Stites
Univ. of Wisconsin, Stevens Point
wstites@fsmail.uwsp.edu
Date: Mon Oct 9 10:57:33 CDT 1995
From: wstites@fsmail.uwsp.edu
Subject: "lurking" - the word
In reply to the complaint that "lurking" is not an appropriate term for
reading but not contributing to lists:
I agree that the word "lurk", with its negative connotations, is not rightly
applied to those who read lists for the purpose of self-education.
However, it is a well established usage in this environment, and is just
one of the wry words computer "geeks" apply to themselves. (The term "geek"
is another example.)
Freddy Krueger lurking in the woods: bad.
Rabi Mohtar "lurking" on agmodels-L: good.
Regarding Daniel Fuka's comments, I disagree partially, although he had a
number of good points. I do not think anyone can assume members of a list
either will speak up or else must agree with the viewpoints that appear.
Perhaps there is some justification for thinking they have a duty to speak
up, but it goes too far to expect they always will. And I strongly disagree
that "membership" in a list is like membership in a political party or the
KKK, as Mr. Fuka opined. For example, any interest group list would certainly
be monitored by persons with opposite interests.
Will Stites
Univ. of Wisconsin, Stevens Point
wstites@fsmail.uwsp.edu
End of Digest
>From root@crcnis1.unl.edu Tue Oct 10 19:51 EDT 1995
Date: Tue, 10 Oct 1995 18:38:59 -0500
Message-Id: <199510102338.AA01822@crcnis1.unl.edu>
Subject: AGMODELS-L digest 374
Contents:
Duplicatee post: "lurking" - the word (Chris Butts <cbutts@asrr.arsusda.gov>)
Re[2]: More on "lurking" (snrclark@muccmail.missouri.edu)
Please get back to the Ag Models subject (Daniel Taylor <taylor@brcsun0.tamu.edu>)
Date: Tue, 10 Oct 1995 10:54:24 -0400 (EDT)
From: Chris Butts <cbutts@asrr.arsusda.gov>
Subject: Duplicatee post: "lurking" - the word
I received a duplicate post of the "lurking" message by mr. Stites. Was
that actuallythe message sent twice inadvertently by Mr. Stites or an
error by the listserv. The reason I ask, is that I had similar problem
with another list where messages were sent twice by the server several
hours apart.
********************************************************************
* Chris Butts * cbutts@asrr.arsusda.gov *
* USDA, ARS *****************************
* National Peanut Research Laboratory * Phone: 912-995-7431 *
* 1011 Forrester Dr., SE *****************************
* Dawson, Georgia 31742 * FAX: 912-995-7416 *
********************************************************************
Date: Tue, 10 Oct 95 10:21:13 CST
From: snrclark@muccmail.missouri.edu
Subject: Re[2]: More on "lurking"
>ALBERT WEISS wrote:
>To me, "lurking" has a negative connotation, it is a sinister type of term.
This weekend I also began to think about the word "lurking." Several others
have as well. I believe that it is important to be careful in using words,
since connotations may communicate the wrong meaning to persons on the outside
of the group or new members. In checking my dictionary, I find the definition
to be:
LURK
1. To lie in wait, as in ambush.
2. To move furtively; sneak.
3. To exist unobserved or unsuspected.
1) verb To move or go stealthily and furtively.
Syn. : sneak, creep, glide, pussyfoot, shirk, skulk, slide,
slink, slip, sly, steal
Comp.: steal
Rel. : crawl, slither, worm, prowl
Cont.: barge, strut, swagger, clump, stamp, stump, stride,
march, parade
While definition #3 may be partially correct, I don't feel that any of these
definitions gets to the heart of the matter. Isn't a listserve similar to a
newspaper, magazine, or newsletter? My subscription is just that, a
SUBSCRIPTION. It allows me to obtain information about topics of interest. My
activity is certainly NOT passive. I must read, or at least delete each piece
of mail, and if some item is of use to me such as an address or announcement or
even a discussion item I must take time to handle it.
I would hope that the "NEW-SPEAK" of the "Brave New World" could be kept at
bay for at least a few more decades. Sincerely,
Clark J. Gantzer (314) 882-0611
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 $$
$$ $$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
<A HREF="http://www.missouri.edu/~snr0287/">
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Date: Mon, 9 Oct 1995 15:20:03 -0500
Message-Id: <9509098132.AA813267943@muccmail.missouri.edu>
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To: snrclark@muccmail.missouri.edu
Subject: Re: More on "lurking"
Date: Tue, 10 Oct 95 14:22:29 CDT
From: Daniel Taylor <taylor@brcsun0.tamu.edu>
Subject: Please get back to the Ag Models subject
One more message about the work "lurking" and I'm out of here.
End of Digest
>From root@crcnis1.unl.edu Wed Oct 11 23:55 EST 1995
Date: Wed, 11 Oct 1995 18:38:45 -0500
Message-Id: <199510112338.AA25414@crcnis1.unl.edu>
Subject: AGMODELS-L digest 375
Contents:
Unsubscribe (HDPARKHILL@aol.com)
Date: Tue, 10 Oct 1995 21:02:02 -0400
From: HDPARKHILL@aol.com
Subject: Unsubscribe
Please remove me from your list
Best Regards,
End of Digest
>From root@crcnis1.unl.edu Fri Oct 13 11:21 EST 1995
Date: Fri, 13 Oct 1995 06:07:39 -0500
Message-Id: <199510131107.AA25105@crcnis1.unl.edu>
Subject: AGMODELS-L digest 376
Contents:
Tomato growth models (boccia@unitus.it (Lorenzo Boccia))
Date: Fri, 13 Oct 1995 11:55:39 +0100
From: boccia@unitus.it (Lorenzo Boccia)
Subject: Tomato growth models
I'm a researcher of Viterbo University - Italy
I'm looking for Tomato Growth Models to create a software for enviromental
control in GreenHouses
1)If anyone can send me the E-Mail of:
- J.W.Jones
- E.Dayan=20
- L.H. Allen
- H. Van Keulen
- H. Challa
All these are authors of an article edited on Transaction of the Asae
n.2/1991:"A Dinamic tomato growth and yeld model (Tomgro)"
2)If anyone have a model to predict growth of tomato in greenhouse=20
3)If anyone can explain me some particular steps of the model "Tomgro"=20
please contact me to my E-MAIL.
Any information would be appreciated.Thanks
Lorenzo Boccia
Universit=E0 degli Studi della Tuscia
01100 Viterbo, ITALY
boccia@unitus.it
End of Digest
>From root@crcnis1.unl.edu Sat Oct 14 11:25 EST 1995
Date: Sat, 14 Oct 1995 06:08:32 -0500
Message-Id: <199510141108.AA12141@crcnis1.unl.edu>
Subject: AGMODELS-L digest 377
Contents:
peas 'n' beans (wstites@fsmail.uwsp.edu)
Reply: peas 'n' beans (griggs@brcsun0.tamu.edu)
Date: Fri Oct 13 08:59:05 CDT 1995
From: wstites@fsmail.uwsp.edu
Subject: peas 'n' beans
Dear agmodelers
Does anyone know of crop models for peas and snap beans?
Thanks,
Will Stites
Central Wisconsin Groundwater Center
109 Nelson Hall, UW-Stevens Point
Stevens Point, Wisconsin 54481
715-346-4501
wstites@uwspmail.uwsp.edu
Date: Fri, 13 Oct 1995 11:17:16 -0500
From: griggs@brcsun0.tamu.edu
Subject: Reply: peas 'n' beans
Dear Will,
EPIC has crop growth parameters for several types of peas and beans.
Contact Ms. Georgie Mitchell mitchell@brcsun0.tamu.edu for software and
documentation and Dr. Jim Kiniry (USDA-ARS) kiniry@brcsun0.tamu.edu for
specific crop growth info. They are both located at the Blackland Research
Center, 808 East Blackland Rd., Temple, TX 76502
good luck,
Ray Griggs
>Dear agmodelers
>
>Does anyone know of crop models for peas and snap beans?
>
>Thanks,
>
> Will Stites
>
> Central Wisconsin Groundwater Center
> 109 Nelson Hall, UW-Stevens Point
> Stevens Point, Wisconsin 54481
> 715-346-4501
> wstites@uwspmail.uwsp.edu
End of Digest
>From root@crcnis1.unl.edu Mon Oct 16 11:22 EST 1995
Date: Mon, 16 Oct 1995 06:03:32 -0500
Message-Id: <199510161103.AA27323@crcnis1.unl.edu>
Subject: AGMODELS-L digest 378
Contents:
Models for Precision Farming (Simon Blackmore <S.Blackmore@cranfield.ac.uk>)
Date: Mon, 16 Oct 1995 11:33:42 +0100
From: Simon Blackmore <S.Blackmore@cranfield.ac.uk>
Subject: Models for Precision Farming
At 09:49 16/10/95, listserv@unl.edu sent a message saying:
> In order to get subscribers talking, I would like to request that each
> new subscriber introduce themself as far as name, affiliation, areas of
> interest models worked with and one 'burning' issue which could serve
> as a focal point of discussion. This introduction, though helpful, is
> voluntary.
Hello All,
As a new subscriber I would like to introduce myself and describe my
particular interests, which are essentially the *use* of models in Precision
Farming (I am not a modeller).
I believe that PF is all about the management of variability, which takes
three forms;
Spatial variability; How the crop changes across the field
Temporal variability; How the crop changes from year to year
Predictive variability; How the crop changes this year from what we predicted.
If anyone has any thoughts on these issues or is currently working on
information tools pertinent to PF, I would enjoy hearing from them.
All the best
Simon.
=============================================
Simon Blackmore, Lecturer in Information Technology
Silsoe College, Cranfield University, England
The Centre for Precision Farming
http://www.cranfield.ac.uk/silsoe/prospect/cpf.htm
=============================================
End of Digest
>From root@crcnis1.unl.edu Wed Oct 18 15:28 EST 1995
Date: Wed, 18 Oct 1995 09:44:03 -0500
Message-Id: <199510181444.AA13004@crcnis1.unl.edu>
Subject: AGMODELS-L digest 379
Contents:
Re: Models for Precision Farming (mckinion@marlin.csrumsu.ars.ag.gov (James McKinion))
Re: Statistical software (Tim Hess <T.Hess@cranfield.ac.uk>)
Introduction (Chris Schroeder <rcs@msilink.com>)
Thank you (<DSUTTER@WVNVM.WVNET.EDU>)
Thank you (<DSUTTER@WVNVM.WVNET.EDU>)
Date: Mon, 16 Oct 1995 08:17:03 -0600
From: mckinion@marlin.csrumsu.ars.ag.gov (James McKinion)
Subject: Re: Models for Precision Farming
>At 09:49 16/10/95, listserv@unl.edu sent a message saying:
>> In order to get subscribers talking, I would like to request that each
>> new subscriber introduce themself as far as name, affiliation, areas of
>> interest models worked with and one 'burning' issue which could serve
>> as a focal point of discussion. This introduction, though helpful, is
>> voluntary.
>
>Hello All,
>As a new subscriber I would like to introduce myself and describe my
>particular interests, which are essentially the *use* of models in Precision
>Farming (I am not a modeller).
>I believe that PF is all about the management of variability, which takes
>three forms;
> Spatial variability; How the crop changes across the field
> Temporal variability; How the crop changes from year to year
> Predictive variability; How the crop changes this year from what we predicted.
>If anyone has any thoughts on these issues or is currently working on
>information tools pertinent to PF, I would enjoy hearing from them.
>All the best
>Simon.
>=============================================
>Simon Blackmore, Lecturer in Information Technology
>Silsoe College, Cranfield University, England
>The Centre for Precision Farming
>http://www.cranfield.ac.uk/silsoe/prospect/cpf.htm
>=============================================
>
>
Simon,
For what its worth here are my two cents on using crop models in PF. I am
the Research Leader of the Crop Simulation Research Unit, USDA, ARS located
at Mississippi State, MS. My areas of expertise are crop modeling, expert
systems, decision support systems, controlled-environment system design, and
real-time data acquisition systems.
I recently received a copy of a final task force report and the
recommendations of the American
Farm Bureau Federation on Global Positioning Systems (GPS) /Geographic
Information Systems
(GIS) dated March 5, 1995. At the recent Information Agriculture Symposium
held at
Champaign, IL, in late June, 1995, many of the topics which were addressed
in the report were
also discussed at the Symposium. The Symposium reached the same conclusions
that many of the
engineering and technical details have been or are very rapidly being
solved, and the only major
link that is missing is getting the biology into the system. One of the
plenary session speakers, Mr
John Reifstack who is a leading farmer from Illinois, said very specifically
that the biological
information has to be added to the system to make precision agriculture
work. In the paper
which I presented there on June 29th, I outlined the methodology which the
Crop Simulation
Research Unit has developed which can fill this knowledge gap and is
targeted for precision or
site-specific farming, by definition.
The Crop Simulation Research Unit of the USDA Agricultural Research Service
in collaboration
with Mississippi State University, Clemson University, and Texas A&M
University has been
conducting systems research over the past 25 years in the development of
crop models and farm
management decision support systems. This research has resulted in the
GOSSYM/COMAX
cotton crop management system, the GLYCIM soybean system, and the Winter
Wheat system.
These are process-level, physiologically-based simulation models which
predict the growth and
yield of cotton and soybean crops in response to soils, weather, and
cultural practices (including varieties). These models are combined with
expert systems and user-friendly interfaces which hide the complexities of
the models and aid the grower in making dynamic, timely decisions affecting
crop production. The GOSSYM/COMAX system has been very successful across
the U.S. Cottonbelt and the
GLYCIM system is just being introduced (the primary scientists who developed
GLYCIM are
now at the Systems Research Laboratory, USDA-ARS, Beltsville, MD). Both of
these models
make use of detailed soils information: sand, silt and clay content, bulk
density by horizon, water
retention curve by horizon, initial water content down to two meters and
organic and inorganic
nitrogen content down to two meters in depth; all by each soil type within
the field. This is as
specific as it gets. All major plant physiological systems are modeled in
detail also. This type of
model is called a process-level model or a tactical model because it can be
used to precisely
simulate crop growth and yield with real weather and cultural practice
inputs and predict crop
response to likely future weather scenarios and hypothesized cultural
practice inputs.
Knowledge-based systems which can respond to the vagaries of historical
weather for the current
season, the dynamic response of the crop by soil type and local nutrition
and soil moisture, and
predict the crop response to likely future weather conditions and
hypothesized cultural practices
directly implies the use of simulation models. Expert systems are not
dynamic. Expert systems
are static by nature. Give an expert system information today and it will
give a current
recommendation which is valid for a short time frame. Expert systems are
not capable of dynamic
predictions which are needed for fertilization, irrigation, pesticide
application, etc. decisions. An
expert system combined with a crop simulation model can. The GOSSYM/COMAX
system can
predict as far as SIX weeks in advance when the cotton crop will run out of
nitrogen. The
GOSSYM/COMAX system can predict as far as FOUR weeks in advance when the
cotton crop
will run out of water, assuming no rain, and go into severe water stress.
It can do this by soil type
for each location in a field.
Dr. James M. McKinion Ph. 601-324-4375
USDA-ARS FAX 601-324-4371
Crop Simulation Research Unit Email mckinion@csrumsu.ars.ag.gov
P. O. BOX 5367
Mississippi State, MS 39762
USA
Date: Mon, 16 Oct 1995 17:29:31 EDT
From: Tim Hess <T.Hess@cranfield.ac.uk>
Subject: Re: Statistical software
I recently posted an invitation for people to advise me on Statistical
Packages for analysis of agronomic trials data. The response was very
good.
For the benefit of those who are interested, I have summaries the responses.
Below are listed the names of the packages the people who replied are using,
and their comments (if any). I claim no responsibilty for these comments
as I have not used any of the packages myself! Where possible, I have included
the address of the supplier, so if you are interested, I suggest that you
ask them for demo-copies, information, etc.
1. Agrobase
Agronomix Software
Portage La Prairie
Manitoba
Canada
Blatta@agronomix.mb.ca
* Designed for plant breeders. Uses Microsoft FoxPro database
2. CoStat, CoDraw, CoPlot
CoHort
PO Box 19272
Minneapolis
MN55419
USA
Fax 612-852-3944
711.61.564@compuserv.com
3. JMP
4. MatLab
* ODE and matrix solving. Good graphics
5. Minitab
Clecom
The Research Park
Vincent Drive
Edgebaston
Birmingham
B15 2SQ
UK
6. SAS
SAS Institute
Research Triangle
North Carolina
USA
* Very comprehensive, but has a timed licence and is relatively expensive.
* Some have suggested that it is 'Not the easiest to use'.
7. SigmaStat / SigmaPlot
Jandel Scientific
8. SPSS
* Good for Social Sciences
9. StatGraphics / StatView
10. Statistica
11. Statistix
Analytical Software
PO Box 12185
Tallahassee
FL 32317-2185
USA
Fax 904-893-9371
* Easy to use. Does RCB, split plots, regression, etc. Does not do non-
* linear regression
12. StatView / Supernova
1918 Bonita Avenue
Berkeley
CA 94704-1014
USA
Fax 510-540-0260
Bonnies@abacus.com
13. Systat
Happy Hunting,
---------------------------------------------------------------------
Tim Hess
Department of Water Management
Silsoe College
Cranfield University
Silsoe Tel (0)1525 863292
Bedford, MK45 4DT Fax (0)1525 863000
UK e-mail t.hess@silsoe.cranfield.ac.uk
----------------------------------------------------------------------
Date: Mon, 16 Oct 1995 21:07:40 -0500
From: Chris Schroeder <rcs@msilink.com>
Subject: Introduction
At 09:49 16/10/95, listserv@unl.edu sent a message saying:
> In order to get subscribers talking, I would like to request that each
> new subscriber introduce themself as far as name, affiliation, areas of
> interest models worked with and one 'burning' issue which could serve
> as a focal point of discussion. This introduction, though helpful, is
> voluntary.
I'd like to introduce myself to the group. I am with a private consulting
firm called Agricultural Education & Consulting (AEC). Much of my work
involves helping agribusinesses develop strategies for how they will
incorporate information technology into their delivery of products and
services.
I am also very involved in a project called CCNet
(http://www.prairienet.org/SiliconPrairie/info_hwy.html#CCNetInfo) that is
looking at the use of high speed network connectivity throughout the
community. Within that project we have a group that focuses on agricultural
applications. A recent project was the development of the Cyberfarm
demonstration (http://w3.ag.uiuc.edu/INFOAG/cyberfarm/) that was a part of
the Information Agriculture Conference that was in Champaign, Illinois this
last June.
My interests in this listserv relate to understanding the information
infrastructure that will be needed to support the vast array of potential
applications in agriculture. That is, how is the necessary data captured,
transmitted, processed, and used by different players in the sector.
I have enjoyed "lurking" and look forward to participating more.
Chris
========================================================
Chris Schroeder
AEC/Centrec
3 College Park Court
Savoy, IL 61874
Phone (217)352-1190 Fax (217)352-1425
http://www.centrec.com/~centrec/
Date: Mon, 16 Oct 1995 22:32:14 -0400 (EDT)
From: <DSUTTER@WVNVM.WVNET.EDU>
Subject: Thank you
I would like to take a second to thank everyone who participated in the
"lurking" research that we were conducting here at West Virginia. Your
responses have been quite helpful and the discussion that sparked from the
survey was both helpful and insightful. If anyone who is a new subscriber
is interested in participating, please contact me at dsutter@wvnvm.wvnet.
edu .
Again, we appreciate all of your help and mail, and encourage anyone who
hasn't had the chance to take a look at the survey, or hasn't responded,
to take a moment to do so.
Thank You
Deirdre L. Sutter
Graduate Student
West Virginia University
Department of Communiation Studies
e-mail dsutter@wvnvm.wvnet.edu
phone: (304) 293-3905
Date: Mon, 16 Oct 1995 22:39:55 -0400 (EDT)
From: <DSUTTER@WVNVM.WVNET.EDU>
Subject: Thank you
I wanted to take the time to thank everyone who has responded to the
"lurking" survey that was posted on this bulliten board. All of the
information that you supplied was of great use, and the discussions were
not only helpful and informative, but entertaing as well!
I encourage anyone who has not seen the survey, or who has not yet had the
chance to complete it, to do so. I would be more than happy to forward
a copy to you. I can be contacted at dsutter@wvnvm.wvnet.edu .
Again, thank you all for your time. You have been more than helpful
and your input is greatly appreciated.
Sincerely,
Deirdre L. Sutter
Graduate Student, West Virginia University
Department of Communication Studies
phone (304) 293-3905
e-mail dsutter@wvnvm.wvnet.edu
End of Digest
>From root@crcnis1.unl.edu Thu Oct 19 16:51 EST 1995
Date: Thu, 19 Oct 1995 11:31:20 -0500
Message-Id: <199510191631.AA10890@crcnis1.unl.edu>
Subject: AGMODELS-L digest 380
Contents:
Re: Introduction ("E. John Sadler" <sadler@sunbrn.florence.ars.usda.gov>)
Date: Thu, 19 Oct 1995 12:17:49 +0000
From: "E. John Sadler" <sadler@sunbrn.florence.ars.usda.gov>
Subject: Re: Introduction
Steve,
Would you be interested in providing an ARS peer review for the
chapter on predicting crop yield variability to be presented at the
St. Louis meeting? I am using attachments for the document and form,
sending them via e-mail, and receiving the form via fax if possible.
If not, we do it the old way.
John Sadler
==============================================================
E. John Sadler
USDA-ARS sadler@florence.ars.usda.gov
Coastal Plains Soil, Water,
and Plant Resarch Center 803-669-5203x112 (voice)
2611 West Lucas St. 803-669-6970 (fax)
Florence, SC 29501-1241
==============================================================
End of Digest
>From root@crcnis1.unl.edu Fri Oct 20 16:48 EST 1995
Date: Fri, 20 Oct 1995 11:32:02 -0500
Message-Id: <199510201632.AA05369@crcnis1.unl.edu>
Subject: AGMODELS-L digest 381
Contents:
Inadvertent distribution ("E. John Sadler" <sadler@sunbrn.florence.ars.usda.gov>)
Date: Thu, 19 Oct 1995 12:21:08 +0000
From: "E. John Sadler" <sadler@sunbrn.florence.ars.usda.gov>
Subject: Inadvertent distribution
Everyone,
My apologies for that last distribution. I used 'reply' to Steve
Rawlins' message and Pegasus puts the list in the 'To' field rather
than the original sender. Sorry for my oversight cluttering up the
ether.
John Sadler
==============================================================
E. John Sadler
USDA-ARS sadler@florence.ars.usda.gov
Coastal Plains Soil, Water,
and Plant Resarch Center 803-669-5203x112 (voice)
2611 West Lucas St. 803-669-6970 (fax)
Florence, SC 29501-1241
==============================================================
End of Digest
>From root@crcnis1.unl.edu Tue Oct 24 15:22 EST 1995
Date: Tue, 24 Oct 1995 10:06:45 -0500
Message-Id: <199510241506.AA03717@crcnis1.unl.edu>
Subject: AGMODELS-L digest 382
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 31 09:37 EST 1995
Date: Tue, 31 Oct 1995 03:13:09 -0600
Message-Id: <199510310913.AA19534@crcnis1.unl.edu>
Subject: AGMODELS-L digest 383
Contents:
ESA 4th Conference '96 - The Netherlands (Ruud Verkerke <D.R.VERKERKE@ab.dlo.nl>)
Date: Tue, 31 Oct 1995 09:50:30 +0000 (GMT)
From: Ruud Verkerke <D.R.VERKERKE@ab.dlo.nl>
Subject: ESA 4th Conference '96 - The Netherlands
-------------------------------------------------------------------------------
E U R O P E A N S O C I E T Y F O R A G R O N O M Y (E S A)
-------------------------------------------------------------------
ESA 4th Congress 7 - 11 July 1996 - Chairman: dr. Hubert Spiertz
Veldhoven - Wageningen, The Netherlands
-------------------------------------------------------------------
Wageningen, 31 October 1995
The fourth CONGRESS of the EUROPEAN SOCIETY for AGRONOMY will be held
from 7-11 July 1996 in the Congress centre Koningshof in Veldhoven,
The Netherlands.
Organization of the Congress:
- DLO Research Institute for Agrobiology and Soil Fertility (AB-DLO)
- C.T. de Wit Graduate School for Production Ecology (WAU-PE)
- Research station for Arable Farming and Field Production of
Vegetables (PAGV)
The Congress will bring together about 400 scientists, primarily from
European countries, and will provide a representative picture of the
direction in which agricultural research and agronomy in an expanding
Europe is moving or has to move.
A General Plenary Session will address:
LAND USE, NATURAL RESOURCES AND AGRICULTURAL PRODUCTION IN AN
EXPANDING EUROPE.
Thereafter three main themes will be introduced in a plenary session,
and elaborated in parallel oral and poster sessions:
1. AGRO-ECOLOGICAL STUDIES AND CLIMATE CHANGE
1.1. Agro-ecological characterization and climate change
1.2. Agro-ecological characterization and water limitation
1.3. Agro-ecological characterization and adaptation of crops.
2. INTEGRATED AND ECOLOGICAL AGRICULTURE
2.1. Designing farming systems: methodological aspects
2.2. Resource use at cropping system level
2.3. Resource use at crop level
3. DYNAMICS OF NUTRIENTS AND ORGANIC MATTER
3.1. Soil fertility, organic matter and C-dynamics
3.2. Phosphate uptake, accumulation and losses
3.1. Nitrogen transformation and utilization
A productive mix with subjects channeled through the existing
Scientific Divisions of ESA is planned.
Optional trips to field experiments on sustainable agriculture, to
the Dutch 'Westland' (the greenhouse horticulture production area)
and to Dutch Agricultural Research Centres will be provided.
A leisure programme is available for accompanying persons.
Those wishing to present a poster or paper are invited to submit an
informative abstract (200-250 words) to the Scientific Secretariat
before 1 December 1995. The abstracts will be reviewed by the
Scientific Committee. Instructions to authors will be sent for
accepted contributions, 15 January 1996. In order to provide a book
of abstracts at the start of the Congress, each author is required to
submit a camera ready two-page abstract by 1 April 1996. Selected
contributions will be published as full papers in a special
Proceedings issue.
The Congress centre 'Koningshof' in Veldhoven is having excellent
facilities for formal and informal exchange of news and views. Its
location in a forested area will create the right atmosphere for
scientific and social interactions.
A preliminary indication for the registration fee, including all
meals and accommodation is DFL 1300 (about 600 ECU). (PhD-)Students
and participants from Middle and Eastern Europe can apply for a
reduced rate.
If you are interested in the Congress or its theme, please return
the reply form to the Organizing Secretariat and you will receive
the S E C O N D C I R C U L A R with further information.
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(Use the numbers below to complete the REPLY FORM/PROVISIONAL
REGISTRATION)
Themes/Sessions of ESA 4th Congress
1.1 Agro-ecological characterization and climate change
1.2 Agro-ecological characterization and water limitation
1.3 Agro-ecological characterization and adaptation of crops
2.1 Designing farming systems: methodological aspects
2.2 Resource use at cropping system level
2.3 Resource use at crop level
3.1 Soil fertility, organic matter and C-dynamics
3.2 Phosphate uptake accumulation and losses
3.3 Nitrogen transformation and utilisation
ESA Scientific Divisions
1. Crop physiology, production and management
2. Agroclimatology and modelling
3. Plant-soil relationships
4. Crop quality and post-harvest physiology
5. Cropping and farming systems
6. Agriculture-environment relationships
============== REPLY FORM / PROVISIONAL REGISTRATION =============
E U R O P E A N S O C I E T Y F O R A G R O N O M Y (E S A)
-------------------------------------------------------------------
ESA 4th Congress 7 - 11 July 1996 - Chairman: dr. Hubert Spiertz
Veldhoven - Wageningen, The Netherlands
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Name: .................................................
Organization: .........................................
Address: ..............................................
Code/City: ............................................
Country: ..............................................
Telephone: ............................................
Fax: ..................................................
E-mail: ...............................................
Y/N I intend to participate
Y/N I wish to contribute
Y/N oral paper to Theme nr. ... or Division nr. ...
Y/N poster to Theme nr. ... or Division nr. ...
Y/N Please send me further information
Y/N I am member of ESA
Y/N Please send details on ESA membership
Date: ................................
====================== End Reply Form ===========================
PLEASE COMPLETE THE REPLY FORM AND RETURN IT BY E-MAIL or...
PRINT THE REPLY FORM AND SEND IT TO THE
ORGANIZING SECRETARIAT:
Kongresservice Brabant
P.O. Box 140, NL-5500 AC Veldhoven, The Netherlands
Telephone: +31 40 254 71 71
Fax : +31 40 254 55 15
E-mail : congress@koningshof.nl
==================== Submission of Abstracts ========================
Submission of Abstracts (200-250 words) before 1 December 1995 to the
SCIENTIFIC SECRETARIAT:
Dr. Siebe van de Geijn
AB-DLO, P.O. Box 14, NL-6700 AA Wageningen, The Netherlands
Telephone: +31 317 47 57 31
Fax : +31 317 42 31 10
E-mail : esa96@ab.dlo.nl
===================================================================
E U R O P E A N S O C I E T Y F O R A G R O N O M Y (E S A)
-------------------------------------------------------------------
ESA 4th Congress 7 - 11 July 1996 - Chairman: dr. Hubert Spiertz
Veldhoven - Wageningen, The Netherlands
-------------------------------------------------------------------
O R G A N I Z A T I O N C O M I T T E E :
BOARD
Dr. Hubert Spiertz (AB-DLO)
Prof.dr. Louise Fresco (WAU-Agronomy)
Dr. Siebe van de Geijn (AB-DLO)
Prof.dr. Rudy Rabbinge (WAU-TPE)
Dr. Kees Rijniersce (PAGV)
EXECUTIVE SECRETARIAT
Dr. Siebe van de Geijn (AB-DLO)
Dr. Martin van Ittersum (WAU-TPE)
Dr. Theo Jetten (WAU-PE)
Dr. Kees Rijniersce (PAGV)
Ruud Verkerke (AB-DLO)
============================================================
>>> PLEASE FORWARD THIS MESSAGE TO COLLEAGUES WHO MIGHT BE
INTERESTED IN THE CONFERENCE
============================================================
End of Digest
Prepared by Steve Modena, AB4EL
Suggestions and comments to: modena@SunSITE.unc.edu