AGMODELS-L: 199511XX

is the compilation of discussion during Nov 95

via AB4EL Web Digests @ SunSITE

AGROMOMY Homepage @ SunSITE


>From root@crcnis1.unl.edu Fri Nov  3 17:26 EST 1995
Date: Fri, 3 Nov 1995 10:48:55 -0600
Message-Id: <199511031648.AA06249@crcnis1.unl.edu>
Subject: AGMODELS-L digest 384

Contents:
Re: Models for Precision Farming//a note from Rob ("Robert D Coffin" <robcoff@unity.ncsu.edu>)



Date: Fri, 3 Nov 1995 11:27:20 -0500 From: "Robert D Coffin" <robcoff@unity.ncsu.edu> Subject: Re: Models for Precision Farming//a note from Rob Mike, I'm glad that at least one post was of use to you. I read the letter below from Dr. McKinion with interest because his simple outline was helpful to me. I suppose that the predictions from these expert systems (even when coupled to simulated output) have their limited inference over time because there are really so many different possible "weather outcomes". Certainly a likelihood can be attached to each "weather outcome" that we specify if the predictions are the result of independent pieces of information. In your last work you combined several sources of variability, say output from the system model and "raw" data values...Were there any problems with independence? Certainly if there was, the staticians would have discussed this right? I don't really have enough background in this subject to ask the correct questions yet; teach me a little and I'll try to piece it together. At least it was encouraging in some way to see that some of the major contraints to "expert system work" still remains to be biological. Look for the proposal on fruit production. Rob ***********************old letter below***************************** On Oct 16, 9:09am, James McKinion wrote: > 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 > >-- End of excerpt from James McKinion -- ------------------------------------------------------------------------------- Robert D. Coffin email:robcoff@unity.ncsu.edu Dept. of Crop Science, box 7620 tele:919-755-1425 North Carolina State University NCSU fax:919-515-5315 Raleigh, North Carolina 27695-7620
End of Digest
>From root@crcnis1.unl.edu Mon Nov  6 21:47 EST 1995
Date: Mon, 6 Nov 1995 15:01:58 -0600
Message-Id: <199511062101.AA29157@crcnis1.unl.edu>
Subject: AGMODELS-L digest 385

Contents:
Neural Network Application in Agriculture Workshop at ICCTA'96 (Mark Varner <varner@umd5.umd.edu>)



Date: Mon, 6 Nov 1995 15:02:22 -0500 (EST) From: Mark Varner <varner@umd5.umd.edu> Subject: Neural Network Application in Agriculture Workshop at ICCTA'96 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. --0-369553466-815688062=:19093 Content-ID: <Pine.OSF.3.91.951106150118.19093I@marple.umd.edu> Recently a group of enhousiastic researchers has proposed to hold a Workshop on Neural Networks Applications in Agriculture within the ICCTA'96 Congress. We have agreed to this Workshop on the condition that the reviewing of the papers is done by our IPC. We wish the Workshop organizers much success. Would it be possible to distribute the attached Call for Papers to interested scientists? Thanking you for your cooperation, Alexander J. Udink ten Cate Aalt A. Dijkhuizen Please distribute to whom it may concern: ------------------------------------------------------------------------------- First Call for Papers Neural Network Applications in Agriculture (NNAA) ICCTA'96 Workshop Wageningen, The Netherlands June 19, 1996 INTRODUCTION Neural Networks are ready for real-world application. It is well known that Neural Networks offer solutions in domains where traditional, non- linear techniques, are not powerful enough. This type of problems often occurs in agricultural domains, where processes are non-linear of nature. In several domains the application of Neural Networks has gained interest. Recent events, such as the Neural Network sessions of the IFAC workshop "AI in Agriculture" and the international symposium "Neural Networks: Artificial Intelligence and Industrial Applications" of the Dutch Foundation for Neural Networks, illustrate the application momentum of Neural Networks. Several projects have aimed at applying NN in agriculture. But which NN-applications have been actually realised in agriculture? In which domains? Using which technologies? Solving which problems? Using which approaches? These questions are addressed by a workshop within the International Congress for Computer Technology in Agriculture (ICCTA'96), which takes place from June 16 to June 19, 1996 in Wageningen the Netherlands. THE WORKSHOP This half-day workshop offers an international platform to present real world applications and discuss aspects of Neural Network applications in agricultural domains. The foreseen public includes decision makers in agribusiness, leading practitioners, scientists from research institutes, extension people in agriculture and food and manufacturers or hard- and software. Topics of interest include (but are not restricted to): * Applications of neural networks, amongst others in the following domains: - Image Recognition - Process Control - Product Classification - Process Modelling - Signal Processing - Predictive Modelling * The process of developing the application * Application from the users/client viewpoint * Learning applications where NN were rejected CALL FOR PRESENTATIONS For this workshop we seek original papers for oral presentation, reporting real-world applications of neural networks in all above-mentioned areas. Candidate papers for the workshop concern application oriented projects aiming at implemented systems, preferably realised in a client-contractor relationship. Purely research oriented papers will be rejected for this workshop. They may of course be of interest for the ICCTA'96 session on Neural Networks and Fuzzy Systems. Candidate papers should clearly describe the application requirements, the realised functionality and the development process of the application. Further items of interest are: Integration with other system components, possible alternative techniques for the neural networks and the structuring of the development process. Additionally to submitted papers, a limited number of papers will be invited from recognised experts in the field of neural network applications in general, and/or neural network applications in agriculture. Submissions in the form of a draft paper (max. 5000 words) or an extended abstract (max. 1500 words) can be sent to: Prof. A.J. Udink ten Cate DLO-Agricultural Research Department Bornsesteeg 53 6708 PD Wageningen The Netherlands +31-(0)317-474132 e-mail: udink@co.dlo.nl Please indicate that your submission concerns the workshop NNAA of the ICCTA'96 congress. Electronic submissions (postscript or ASCII files) are preferred. Submissions are reviewed according to the ICCTA'96 review procedure. Accepted papers will appear in the congress proceedings. Additionally publication of the workshop papers in an international journal is aimed for. Deadlines Submission 15-12-95 Notification of Acceptance for the workshop 31- 1-96 Camera Ready Copies 1- 3-96 Workshop 19- 6-96 COSTS Visiters to ICCTA'96 have free access to the workshop. Exclusive registration for the workshop is also possible. Registration fees in this case will be based on the fee for the ICCTA'6 congress. WORKSHOP COMMITTEE Prof. J. DeBaerdemaeker Catholic University of Leuven (B) Prof. C.C.A.M. Gielen Foundation of Neural Networks, Nijmegen (NL) Dr. H.J. Kappen Foundation of Neural Networks, Nijmegen (NL) Dr. Th. Rath University of Hannover (D) Dr. V. Steinmetz Cemagref Montpellier, Montpellier (F) LOCAL ORGANISERS Ir. A.J.M. Timmermans & Drs. F. Verdenius e-mail {A.J.M.Timmermans,F.Verdenius}@ato.dlo.nl ATO-DLO, PO box 17, 6700 AA Wageningen, The Netherlands phone +31-(0)317-475000 in close co-operation with the International Program Committee of ICCTA'96. FURTHER INFORMATION For any additional information, please contact the local organisers. --0-369553466-815688062=:19093--
End of Digest
>From root@crcnis1.unl.edu Tue Nov  7 21:34 EST 1995
Date: Tue, 7 Nov 1995 15:02:15 -0600
Message-Id: <199511072102.AA22487@crcnis1.unl.edu>
Subject: AGMODELS-L digest 386

Contents:
Re: Neural Network Application in Agriculture Workshop at ICCTA'96 (rilcont1@area.bo.cnr.it (Davide Viaggi))
     Pesticide Properties Database (DON WAUCHOPE <DON@tifton.cpes.peachnet.edu>)



Date: Tue, 7 Nov 1995 01:03:16 -0600 From: rilcont1@area.bo.cnr.it (Davide Viaggi) Subject: Re: Neural Network Application in Agriculture Workshop at ICCTA'96 Very interesting. I can not participate, ,but I would be very ijnterested in the proceedings. I have herd about the subject but I do not know almost anything? Are thereany promising applications in agriculture? =20 Davide Viaggi Phd student in Agricultural Economics and Policy University of Siena (Italy) Contact address: Istituto di Estimo Rurale e Contabilit=E0 Universit=E0 di Bologna via Filippo Re, 10 40126 Bologna (Italy) tel. + 39 51 351625 fax + 39 51 252187 E-mail rilcont1@area.bo.cnr.it
Date: Tue, 07 Nov 95 10:01:25 EST From: DON WAUCHOPE <DON@tifton.cpes.peachnet.edu> Subject: Pesticide Properties Database The ARS systems Research Laboratory at Beltsville has put a web site and ftp site online that contains a compilation of physical, chemical, and environmental properties of about 330 pesticides. Addresses: http://www.arsusda.gov/ppdb.html ftp: asrr.arsusda.gov (anonymous login, PUB directory) The idea behind this database is to develop concensus values for the most important environmentally relevant properties used in modelling. We hope to "regionalize" these properties in time. There is a Steering Committee which is intended to meet regularly and referee inputs, QA, changes, etc. They are: Basil Acock (ARS/ASRR), Joe Bagdon (NRCS), Dale Bucks (ARS/NPS), David Eckhardt (USGS), Tom Gilding (ACPA), Constance Haaser (EPA), Al Herner (ARS) Art Hornsby (U. FL), Don Wauchope (ARS), and Russell Jones (Rhone-Poulenc) ARS and the Steering Committee hope you will look over the values for those compounds you're interested in and let us know if you have additions, etc. We do want references if the data are published, but we also accept data from industry (in fact much of the data is from the manufacturers--this DB is the result of a LOT of cooperation from industry with coordination from ACPA (formerly NACA). Don Wauchope
End of Digest
>From root@crcnis1.unl.edu Thu Nov  9 01:32 EST 1995
Date: Wed, 8 Nov 1995 19:08:32 -0600
Message-Id: <199511090108.AA14482@crcnis1.unl.edu>
Subject: AGMODELS-L digest 387

Contents:
Theoretical Ecology mailing list? (bill@biome.bio.dfo.ca (Bill Silvert))
Theoretical Ecology mailing list exists (bill@biome.bio.dfo.ca (Bill Silvert))
fuzzy ecology list (leone@unitus.it (antonio leone))



Date: Tue, 07 Nov 1995 14:32:41 -0400 (AST) From: bill@biome.bio.dfo.ca (Bill Silvert) Subject: Theoretical Ecology mailing list? I receive queries from time to time about mailing lists in theoretical ecology, and since I don't know of any, I might set one up if there is any interest. I would be interested in hearing back from anyone interested in such a list. There are of course numerous more general lists, such as the CSTB list (Canadian Society for Theoretical Biology) and ECOLOG-L, and some more specific lists like Fuzzy-Ecology and AGMODELS-L. I am not convinced that there is a need for a new list, but there are some topics that don't seem to be covered on existing lists which might make a new list appropriate. The kinds of topics that I think would be appropriate for such a list would be discussion of alternate modelling approaches, such as network analysis, loop analysis, stability studies, applications of catastrophe theory and chaos theory to ecosystems, complexity, and reviews of different software programs for modelling and analysis. There are also some fundamental questions about the structure and dynamics of ecosystems that might be appropriate for such a list. I'll see what kind of response I get, and if there is interest I'll set up such a list on our server. -- Bill Silvert, Habitat Ecology Section, Habitat Science Division Bedford Institute of Oceanography, P. O. Box 1006 Dartmouth, Nova Scotia, CANADA B2Y 4A2 HED runs a WWW server at URL=http://hed.bio.dfo.ca
Date: Tue, 07 Nov 1995 22:28:38 -0400 (AST) From: bill@biome.bio.dfo.ca (Bill Silvert) Subject: Theoretical Ecology mailing list exists I've been deluged with messages of support for my suggestion of a theoretical ecology mailing list, so I set one up. To subscribe, send the message subscribe theoretical-ecology to Lists@scotia.dfo.ca Judging by the responses I got, there will be some interesting items posted to the new list! -- Bill Silvert, Habitat Ecology Section, Habitat Science Division Bedford Institute of Oceanography, P. O. Box 1006 Dartmouth, Nova Scotia, CANADA B2Y 4A2 HED runs a WWW server at URL=http://hed.bio.dfo.ca
Date: Wed, 8 Nov 1995 21:05:06 +0100 From: leone@unitus.it (antonio leone) Subject: fuzzy ecology list Dear netters, Does anyone know the address of Fuzzy-Ecology list? Thanks ******************************************************** * Antonio Leone * email: leone@unitus.it * * Universita' della Tuscia *************************** * Facolta' di Agraria * fax: int. +761-357353 * * via S. Camillo de Lellis *************************** * 01100 Viterbo - Italy * tel: int. +761-357363 * ********************************************************
End of Digest
>From root@crcnis1.unl.edu Fri Nov 10 01:42 EST 1995
Date: Thu, 9 Nov 1995 19:15:53 -0600
Message-Id: <199511100115.AA13934@crcnis1.unl.edu>
Subject: AGMODELS-L digest 388

Contents:
Re: Pesticide Properties Database (fwd) (Robert Caldwell <rcaldwel@hawaii.edu>)
Crop Modeling Workshop ("Dr. Gerrit Hoogenboom" <gerrit@bae.griffin.peachnet.edu>)



Date: Thu, 9 Nov 1995 07:23:16 -1000 From: Robert Caldwell <rcaldwel@hawaii.edu> Subject: Re: Pesticide Properties Database (fwd) On Tue, 7 Nov 1995, DON WAUCHOPE wrote: > The ARS systems Research Laboratory at Beltsville has put a web site and > ftp site online that contains a compilation of physical, chemical, and > environmental properties of about 330 pesticides. Addresses: > > http://www.arsusda.gov/ppdb.html > ftp: asrr.arsusda.gov (anonymous login, PUB directory) > > The idea behind this database is to develop concensus values for the most > important environmentally relevant properties used in modelling. Thank you for this important work. Let me though make two suggestions. I would like to see the data values in a format that would be more easily machine-readable (to automate the search and retrieval of the parameters). IBSNAT's DSSAT 3 file format style would be a good starting point. Also, I suggest that the database be expanded to include the rules for legal use of the pesticide, i.e., the label restrictions. Your "properties used in modelling" are designed for "calculating pesticide movement in soils" (from the WWW page). Please consider the needs of whole-farm-management modelers who must identify the set of pesticides that can legally be used for a particular soil, pest/disease, weather, and management combination. This ability to identify useable pesticides is important to research projects I am currently developing, so I do plan to invest some energy into the problem. (Once a format is defined for storing/retrieving the label restrictions, pesticide manufacturers might be required to provide their labels in machine readable form, to be stored in "one authoritative source" on the Internet.) Aloha, Robert M. Caldwell, rcaldwel@hawaii.edu Deparment of Agronomy and Soil Science 1910 East West Road Honolulu, HI 96822 Phone: (808) 956-6835; FAX: (808) 956-6539.
Date: Thu, 9 Nov 1995 17:46:31 -0500 From: "Dr. Gerrit Hoogenboom" <gerrit@bae.griffin.peachnet.edu> Subject: Crop Modeling Workshop --=====================_815967964==_ --=====================_815967964==_ Training Program on COMPUTER SIMULATION OF CROP GROWTH AND MANAGEMENT RESPONSES May 27 - June 7, 1996 Athens, Georgia Presented by The University of Georgia College of Agricultural and Environmental Sciences and Georgia Center for Continuing Education Site of Olympic Soccer, Volleyball, and Rhythmic Gymnastics 1996 RATIONALE Today more than ever, increased food production depends on judicious use of resources. Many soil, climatic, plant, and management factors affect the way a crop will respond to irrigation, fertilizer and other management practices. Determining appropriate crop management strategies under these uncertainties has major economic and environmental implications. Computer simulation models of the soil/crop/atmosphere system can make a valuable contribution to both furthering our understanding of the processes determining crop responses and predicting crop performance in different areas. With the increasing availability of personal computers, user-oriented simulation models will greatly facilitate the task of optimizing crop and nutrient management and deriving recommendations concerning crop management. They also can be used to investigate environmental and sustainability issues of agro-ecosystems. The University of Georgia, in collaboration with the University of Florida, International Fertilizer Development Center (IFDC), Michigan State University, University of Hawaii, and the International Consortium for Agricultural Systems Applications (ICASA), has been at the forefront in developing crop models and decision support systems suitable for use and application in both developed-and developing-country agriculture. The University of Georgia is organizing this training program on Computer Simulation of Crop Growth and Management Responses at the Georgia Center, Athens, Georgia, from May 27-June 7, 1996. PROGRAM OBJECTIVES In this training workshop participants will learn how a comprehensive simulation model of crop growth and development and water and nutrient dynamics is constructed and how it can be applied to real world problems. Specifically, the program will focus on: 1. Operation of the new DSSAT v3 software. 2. Description of the CERES and CROPGRO computer simulation models. 3. Data requirements and collection for systems simulation. 4. Application of the simulation, models to cropping, environmental, and sustainability problems. 5. Integration of the crop simulation models with data base management and geographic information systems. PROGRAM CONTENT The program will describe the practical approaches to simulating the effects of soil, climatic, management, and pest factors and their interaction with the input needs of crops. The program will demonstrate how the processes of crop growth and development, water use, uptake of nutrients and response to irrigation, fertilizer, and other management decisions can be simulated. The program will make extensive use of "hands on" practical sessions on personal computers that demonstrate the application of simulation models to cropping systems in various regions of the world. Together with these applications, the methods for assessing the economic risks and environmental impacts associated with agricultural production in real world problems will be discussed. Procedures for managing soil, crop, and weather data will be described. The program will make extensive use of the CERES (maize, wheat, rice, sorghum, barley, and millet,), CROPGRO (peanut, soybean, dry bean, and tomato), SUBSTOR (potato), and CROPSIM (cassava) models for crop growth, development, and response to water and nutrients. Techniques for simulation of synthetic weather sequences will be described. Programs to create, run, and analyze both single season simulations and crop rotation simulations will be explained. The crop simulation models, data preparation, and application programs have been integrated into the new Decision Support System for Agrotechnology Transfer (DSSAT) v3 software package, Participants will be provided with a complete copy of DSSAT v3. ABOUT THE TRAINING WORKSHOP The program will begin May 27 and end June 7, 1996. It will be held at the Georgia Center, University of Georgia, Athens, Georgia, USA. International participants should plan to arrive 2 days before the program begins to adjust to time zone differences and recover from travel fatigue. The University of Georgia is located 112 kilometers from the Atlanta Hartsfield International Airport which is served by most major carriers. Rental cars are available at the airport. Athens may be reached by highways 29, 78, 129, 316, and 441; Interstate Highways I-85 and I-20 are nearby. Commuter flights into the Athens Ben Epps Municipal Airport are available via USAir. Regularly scheduled limousine service between Hartsfield Airport and the Georgia Center is available through AAA Airport Express for $45 per person round trip. Please call 800- 354-7874 for reservations. Athens was founded in 1801. Along with the surrounding metropolitan area it is home to over 125,000 people. Employment in the community is a mix of business, university and government. Athens is home for the Georgia Museum of Art and the State Botanical Garden of Georgia. The Botanical Garden features a number of specialty gardens and plant collections. A Visitor Center/Conservatory features a permanent display of tropical and semitropical plants. Historic Downtown Athens has a rich heritage of architectural diversity with many buildings constructed in the late nineteenth and early twentieth centuries. QUALIFICATIONS FOR APPLICATION 1. Participants should be university graduates currently engaged in crop production or agro- ecosystems related research, teaching, outreach, or planning. 2. They should have some understanding of soil and crop science and be relatively familiar with the terminology used in these fields. An in-depth knowledge is, however, not a prerequisite. 3. They should be familiar with personal computers and the DOS operating environment. 4. They should be fluent in English. REGISTRATION FEE The fee for this training workshop is $1600. It covers the registration for the 2-week program, resource material including the DSSAT v3 software, tea/coffee breaks, and daily lunch. It does not cover breakfast, dinner, and lodging during the program nor air transportation and health insurance. Each participant is responsible for these costs. Food and hotel lodging will average about $75/day. VISA REQUIREMENT A visa is required for entry into the United States. Each participant must obtain a visitor visa form the Embassy or Consulate of the United States in his or her country of residence and fulfill any required health formalities. FACULTY Dr. Gerrit Hoogenboom, The University of Georgia Dr. K.J. Boote, University of Florida Dr. W. T. Bowen, International Fertilizer Development Center Dr. J.W. Jones, University of Florida Dr. P.K. Thornton, International Fertilizer Development Center . . . and other experts from IFDC, Agricultural University, Wageningen, and ICASA Please return to: Computer Simulation of Crop Growth 30045 Georgia Center for Continuing Education The University of Georgia Athens, Georgia 30602-3603 (706) 542-2134 or FAX: (706) 542-6596 (800) 884-1381 or FAX: (800) 884-1419 _________________________________________________________________ Registration Form _________________________________________________________________ (name-please print or type) _________________________________________________________________ (preferred name for name badge) (social security no.*) _________________________________________________________________ (mailing address: please check if home 0 or office 0) __________________________________________________________________ (city) (state) (zip) (county,if Georgia) Telephone Numbers: Work:_________________________ Home:_____________________________ Fax:_________________________ EMail:_____________________________ _________________________________________________________________ (position) __________________________________________________________________ (organization or employer) *SSN is used to confirm name for retrieval of transcript. _________________________________________________________________ Registration Fee(s): Registration............................$1600 __________________ Total:$ __________________ __________________________________________________________________ Method of payment to guarantee registration: 0 Check (made payable to The University of Georgia) 0 AMEX or 0 DISCOVER or 0 MC or 0 VISA No.______________________________________________________________ Name on card:_____________________ Expires____________/___________ 0 Payment being processed: PO # _________________________________ 0 Bill my ATTN:___________________________________________ organization: ________________________________________________ ________________________________________________ 0 This is payment for a phone registration _________________________________________________________________ Lodging Reservations: Please complete the following to have lodging reserved at or by the Georgia Center. Arrival Date:_____________________ Departure Date_________________ Please check your room preference: 0 Single Standard-Twin Beds $48 0 Single Preferred-Twin Beds $51 0 Double Standard-Twin Beds $55 0 Double Preferred-Twin Beds $58 0 Single Standard-Queen Bed $51 0 Single Preferred-Queen Bed $54 0 Double Standard-Queen Bed $55 0 Double Preferred-Queen Bed $58 (Sales tax will be added to quoted rates.) If requested room type is unavailable, the best alternative will be confirmed. Roommate's name for shared room: ___________________________________ (The Georgia Center does not assign roommates. Singles rates will be charged for single occupancy.) Advance payment for lodging is not required. 0 Please check here for special dietary requirements. DIRECT REQUEST FOR WORKSHOP AND FACILITIES INFORMATION TO: Margaret Caufield Georgia Center for Continuing Education The University of Georgia Athens, Georgia 30602, UGA Tel: (706) 542-5654; Fax: (706) 542-6465 E-mail: caufieldm@gacsrv.gactr.uga.edu DIRECT REQUEST FOR PROGRAM INFORMATION TO: Dr. Gerrit Hoogenboom Department of Biological and Agricultural Engineering The University of Georgia Griffin, Georgia 30223, USA Tel: (770) 228-7216; Fax (770) 228-7218 E-mail: gerrit@bae.griffin.peachnet.edu COSPONSORS The University of Georgia University of Florida International Fertilizer Development Center (IFDC) International Consortium for Agricultural Systems Applications (ICASA) FOUR WAYS TO REGISTER: 1. Mail: Computer Simulation of Crop Growth Georgia Center for Continuing Education The University of Georgia Athens, GA 30602-3603, USA 2. FAX: (800) 884-1419 Local FAX: (706) 542-6596 3. E-Mail: Register @ gacsrv.gactr.uga.edu Reference Computer Simulation of Crop Growth 30054. Provide information in exact order as listed on registration form. 4. Phone: (800) 884-1381 Local Phone:(706) 542-2134 To guarantee enrollment, payment must be made with a purchase order, check or credit card by May 1, 1996. Enrollment is limited to 30 participants. GENERAL INFORMATION The Georgia Center for Continuing Education, a full-service residential conference center on the campus of The University of Georgia, has as its mission to serve the learning needs of adults and organizations and to provide leadership in developing the theory and practice of continuing education. The University of Georgia is an equal opportunity/affirmative action institution. PLEASE NOTE THE FOLLOWING: * If you require special services or facilities to support your participation in a Georgia Center program, contact the Georgia Center coordinator identified in this brochure. * Please refer to the information below for details about cancellation procedures and responsibilities. * The Georgia Center is a smoke-free environment. LODGING The Georgia Center provides a variety of accommodations-some suites may be available. The Georgia Center offers standard rooms with two twin-size beds or one queen-size bed or more spacious preferred rooms similarly furnished. Indicate your lodging preference in the appropriate space on the Registration Form. Sales tax will be added to quoted rates. OTHER Transportation: Information on transportation and parking will be provided with your confirmation. Program Cancellation Policies: (1) Cancellation of pre-registration must be made at least 72 hours before the conferences begins in order to avoid being billed 25 percent of the registration fee. Substitution of personnel is recommended in lieu of cancellation. Pre-registrants who fail to attend or to send a substitute are liable for full registration fee. To cancel a pre-registration, call (706) 542-2134. (2) In the event a program is cancelled for any reason, the Georgia Center will not be responsible for any cancellation changes/charges assessed by airlines or travel agencies.
>From root@crcnis1.unl.edu Sat Nov 11 01:33 EST 1995
Date: Fri, 10 Nov 1995 19:16:44 -0600
Message-Id: <199511110116.AA17326@crcnis1.unl.edu>
Subject: AGMODELS-L digest 389

Contents:
     Re: Pesticide Properties Database (fwd) (DON WAUCHOPE <DON@tifton.cpes.peachnet.edu>)



Date: Thu, 09 Nov 95 23:46:29 EST From: DON WAUCHOPE <DON@tifton.cpes.peachnet.edu> Subject: Re: Pesticide Properties Database (fwd) On Thu, 9 Nov 1995 11:48:07 -0600 Robert Caldwell said: > >On Tue, 7 Nov 1995, DON WAUCHOPE wrote: ...(snip) > >Thank you for this important work. Let me though make two >suggestions. I would like to see the data values in a format that would >be more easily machine-readable (to automate the search and retrieval >of the parameters). IBSNAT's DSSAT 3 file format style would be a >good starting point. > >Also, I suggest that the database be expanded to include the rules for >legal use of the pesticide, i.e., the label restrictions. Your >"properties used in modelling" are designed for "calculating pesticide >movement in soils" (from the WWW page). Please consider the needs of >whole-farm-management modelers who must identify the set of pesticides >that can legally be used for a particular soil, pest/disease, weather, and >management combination. This ability to identify useable pesticides is >important to research projects I am currently developing, so I do plan to >invest some energy into the problem. (Once a format is defined for >storing/retrieving the label restrictions, pesticide manufacturers might >be required to provide their labels in machine readable form, to be stored >in "one authoritative source" on the Internet.) > >Aloha, > >Robert M. Caldwell, rcaldwel@hawaii.edu >Deparment of Agronomy and Soil Science >1910 East West Road >Honolulu, HI 96822 > >Phone: (808) 956-6835; FAX: (808) 956-6539. > Thank you for the kind words. I am not familiar with the data format you mention, but I can tell you that there are 15 properties listed for each pesticide and they have quite a variety of units, formats, etc. Is the IBSNAT format very flexible and generic or what? Check out a record for one of the pesticides and tell me if you think the format will work. As for adding label information, you probably know that each individual label for each product (and there may be many products for a given AI and there are many mixtures) is a carefully negotiated legal document that probably would have to be included in the data base in complete, as-is form| Your idea of some sort of universal label format that could be handled in a database is a great one, and the resulting database would be relatively easy to maintain. The place for this to be maintained, of course, would be at EPA, since they are the only ones who know at any time exactly what the current registration are. We could then hyperlink to it, I suppose... Don Wauchope
End of Digest
>From root@crcnis1.unl.edu Mon Nov 13 19:59 EST 1995
Date: Mon, 13 Nov 1995 13:29:00 -0600
Message-Id: <199511131929.AA29071@crcnis1.unl.edu>
Subject: AGMODELS-L digest 390

Contents:
Re: Pesticide Properties Database (fwd) (Robert Caldwell <rcaldwel@hawaii.edu>)



Date: Mon, 13 Nov 1995 08:29:47 -1000 From: Robert Caldwell <rcaldwel@hawaii.edu> Subject: Re: Pesticide Properties Database (fwd) On Thu, 9 Nov 1995, DON WAUCHOPE wrote: > On Thu, 9 Nov 1995 11:48:07 -0600 Robert Caldwell said: > > (snip) > >Thank you for this important work. Let me though make two > >suggestions. I would like to see the data values in a format that would > >be more easily machine-readable (to automate the search and retrieval > >of the parameters). IBSNAT's DSSAT 3 file format style would be a > >good starting point. > > (snip) > > > Thank you for the kind words. I am not familiar with the data format you > mention, but I can tell you that there are 15 properties listed for each > pesticide and they have quite a variety of units, formats, etc. Is the > IBSNAT format very flexible and generic or what? The two best sources of information on the data format standards are the technical documentation to DSSAT (DSSAT version 3, volume 2; G. Tsuji, G. Uehara, and S. Balas; contact via 'ibsnat@Hawaii.edu', or use my departmental address, below) and Uhlir, P.F. and G.C. Carter. 1994. Crop modeling and related environmental data. CODATA Monograph Series, Volume 1. CODATA, 51 Boulevard de Montmorency, 75016 Paris. Elements of the formats are flexible and generic, e.g.: '!' for comment lines, '*' to start a new data section within a file, and '@' to start a header line that names each data field for the following lines. (The current DSSAT v3 format definitions use column formating for data, though I've tended to use list directed input, which provides for more flexibility.) Identifying comments, sections, and data fields would be a necessary step forward in making a machine readable pesticide database. > > As for adding label information, you probably know that each individual label > for each product (and there may be many products for a given AI and there > are many mixtures) is a carefully negotiated legal document that probably > would have to be included in the data base in complete, as-is form| > > Your idea of some sort of universal label format that could be handled in > a database is a great one, and the resulting database would be relatively > easy to maintain. The place for this to be maintained, of course, would be > at EPA, since they are the only ones who know at any time exactly what the > current registration are. We could then hyperlink to it, I suppose... Because of the legal ramifications, it may be necessary that the pesticide manufacturers, in conjunction with the EPA, create and maintain the database on label information. The cost of the database would be a small fraction of the labelling process, and we (researchers, extension agents, teachers, NRCS staff, EPA staff, and farmers) would be more accurate and more efficient in finding the label information we need. Robert M. Caldwell, rcaldwel@hawaii.edu Deparment of Agronomy and Soil Science 1910 East West Road Honolulu, HI 96822 Phone: (808) 956-6835; FAX: (808) 956-6539.
End of Digest
>From root@crcnis1.unl.edu Wed Nov 15 18:20 EST 1995
Date: Wed, 15 Nov 1995 11:56:39 -0600
Message-Id: <199511151756.AA10656@crcnis1.unl.edu>
Subject: AGMODELS-L digest 391

Contents:
DSS's for UK use (c.g.parker@lut.ac.uk (Caroline Parker))



Date: Wed, 15 Nov 95 15:54:42 gmt From: c.g.parker@lut.ac.uk (Caroline Parker) Subject: DSS's for UK use Dear Agmodellers I'm trying to create a list of decision support tools which are, or could be, available to UK farmers and growers. I would be grateful to anyone who can tell me about those they've come across. (If such a list exists already I would be even more grateful for knowledge of its whereabouts!) If responses are sent to me directly (to avoid clogging the discussion group) I will compile the list and post it to everyone. I am also interested learning about US, Australian or other countries DSS's which could theoretically be employed in the UK. Many thanks 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**
End of Digest
>From root@crcnis1.unl.edu Fri Nov 17 18:53 EST 1995
Date: Thu, 16 Nov 1995 11:57:22 -0600
Message-Id: <199511161757.AA01202@crcnis1.unl.edu>
Subject: AGMODELS-L digest 392

Contents:
Re: DSS's for UK use (Derek Morgan <dm00hp@csl.gov.uk>)
RE: DSS's for UK use (WOODWARDS@agresearch.cri.nz)
Re: DSS's for UK use (WOODWARDS@agresearch.cri.nz)
(Fwd) (Fwd) Re: DSS's for UK use ("Peter B. Goodell" <IPMPBG@UCKAC.EDU>)
     Re: Pesticide Properties Database (fwd) (DON WAUCHOPE <DON@tifton.cpes.peachnet.edu>)
Re: DSS's for UK use ("P. Grace" <gracep@adl.soils.csiro.au>)
      Modellers in the UK only! (Graham Russell <GRUSSELL@srv0.bio.ed.ac.uk>)
 Re: Modellers in the UK only! (AUDSLEY <eric.audsley@bbsrc.ac.uk>)
Re: Modellers in the UK only! (Derek Morgan <dm00hp@csl.gov.uk>)



Date: Wed, 15 Nov 1995 18:59:48 GMT From: Derek Morgan <dm00hp@csl.gov.uk> Subject: Re: DSS's for UK use > > Dear Agmodellers > I'm trying to create a list of decision support tools which are, or could > be, available to UK farmers and growers. I would be grateful to anyone who > can tell me about those they've come across. (If such a list exists already > I would be even more grateful for knowledge of its whereabouts!) If > responses are sent to me directly (to avoid clogging the discussion group) > I will compile the list and post it to everyone. > > I am also interested learning about US, Australian or other countries DSS's > which could theoretically be employed in the UK. > > > Many thanks > > 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** > > > Caroline I noted with interest your call regarding availability of DSS to UK growers/farmers/consultants. It is a difficult question to answer, for many reasons including : (i) DSS means different things to different people and whereas one farmer would say he/she is using a DSS the next would not, even though they are using the same approaches. Additionally, no clear standard definition adds to the confusion; (ii) DSS is a new technology still for farmers and consultants, although this is changing. Without question some DSS are being used on farms but very few have made the transition from research projects into practical and viable tools. Why this is so is another question (poor design, lack of functionality, hungry hardware/software/data requirements, high costs, ..... ?). I posted my reply back to the discussion group rather than directly to you as I felt your original posting raised several issues that are worthy of my general discussions. Hopefull others will feel similarly and respond ! [I almost forgot to mention the DSS I have been involved with :- PEST-MAN (DSS for top fruit insect pest management) and ADEM (DSS for apple diseases). Both are commercial products being used 'in anger' by apple and pear farmers and consultants throughout the UK]. All the best Derek Dr Derek Morgan, CSL, Harpenden, Herts. UK, AL5 2BD e-mail - d.morgan@csl.gov.uk telephone - (+44) (0)1582 715241 fax - (+44) (0)1582 762178
Date: Thu, 16 Nov 1995 09:15 +1200 (NZST) From: WOODWARDS@agresearch.cri.nz Subject: RE: DSS's for UK use Dear AgModellers and people interested in DSS Here at AgResearch Whatawhata (in New Zealand) we have a software group (AgResearch Software) who specialise in development, marketing, support and training for computer decision support systems. These packages are primarily targeted at New Zealand's pastoral farmers farming sheep, beef, deer, and dairy. Our current suite of programs run under DOS and have been commercially available to farmers and farm consultants for several years. Increasing numbers of consultants and farmers are using the software as suits their needs. We currently sell four programs: STOCKPOL is a major tool for stock planning and feed budgeting with multiple stock classes. It is based on dynamic pasture and animal models. This is the flagship and is being used extensively throughout New Zealand, including as an educational aid in farm planning. TOPFLITE helps farmers to plan the timing of shearing to achieve certain wool weight and quality goals, and examines factors affecting wool quality and feed requirements. BOVISION is a specialist decision support tool tailored to beef finishing operations. It allows reconciliation of stock age classes, buying and selling, mating and feed planning, as well as performing economic analyses. OUTLOOK is designed to help farmers with planning long term fertiliser policy, by predicting the soil nutrient carryover from year to year and comparing economic returns from contrasting fertiliser strategies. Currently only phosphate is considered, but the upgraded version due to be released in February 1996 will incorporate sulphur dynamics as well. The new version will be in Windows. OUTLOOK is available from Soil Fertility Service Ruakura Research Centre Private Bag 3123 Hamilton New Zealand Tel +64 7 838 5920 Fax +64 7 838 5160 STOCKPOL, TOPFLITE, and BOVISION are available from AgResearch Software Whatawhata Research Centre Private Bag 3090 Hamilton New Zealand Tel +64 7 829 8016 Fax +64 7 829 8871 Simon Woodward ****************************************************** Dr Simon J R Woodward, "Farm Systems Modeller" AgResearch: New Zealand Pastoral Agricultural Research Institute Ltd Whatawhata Research Centre, Private Bag 3089, Hamilton, New Zealand phone +64-7-829-8789, fax +64-7-829-8871, email woodwards@agresearch.cri.nz
Date: Thu, 16 Nov 1995 09:42 +1200 (NZST) From: WOODWARDS@agresearch.cri.nz Subject: Re: DSS's for UK use >To quote Derek Morgan: >(ii) DSS is a new technology still for farmers and consultants, although this >is changing. Without question some DSS are being used on farms but very few >have made the transition from research projects into practical and viable >tools. Why this is so is another question (poor design, lack of >functionality, hungry hardware/software/data requirements, high costs, ..... >?). I visited UK briefly this year (May, June 1995) and touring around several research centres I was shown a number of "DSS" programmes. Almost without exception these were research models that had had a little bit of interface added on. Usually there were pages of parameters to be filled in. In New Zealand, there is not so much simulation modelling going on in Agricultural science. However we have developed DSS software, because many NZ farmers want to innovate and use new technology. Our method has been to ask what do farmers (or consultants) want? Then we make use of simple dynamical models and produce a prototype. This goes through several iterations where a "user group" consisting of the potential clients take away the prototypes ("beta versions") for a couple of months, then come back together and discuss their experience, what worked well, what was a good idea, what was lacking, gripes, etc. The software is modified and another prototype is trialled. So our DSS is very much tailored to the clients rather than scientists. Actually scientists have to stay in the background. I think this is why we have been fairly successful in getting farmers to actually buy and use the software. The software is also effectively promoted by word of mouth fro farmer to farmer. The underlying models are simple, and the parameters are biologically meaningful. The parameters are not entered by the user, but are taken from look-up tables by the software. For example, if the user says they have easy sedimentary hill country 25km from the coast in the Waikato region of NZ, the computer looks up a whole lot of soil, slope, rainfall, and pasture parameters. Users do not want to have to type e.g. in the phosphate leaching coefficient for sedimentary hill soils. One DSS I was impressed with in England was NCYCLE. Very simple, pretty friendly, colourful. Simon ****************************************************** Dr Simon J R Woodward, "Farm Systems Modeller" AgResearch: New Zealand Pastoral Agricultural Research Institute Ltd Whatawhata Research Centre, Private Bag 3089, Hamilton, New Zealand phone +64-7-829-8789, fax +64-7-829-8871, email woodwards@agresearch.cri.nz +-----+ | | | | | | +-----+ +--+--+ +--+--+ +--+--+ | / +--+--+ +---+ / \ /| | / \ | | / \ +---+
Date: Wed, 15 Nov 1995 13:23:55 PDT From: "Peter B. Goodell" <IPMPBG@UCKAC.EDU> Subject: (Fwd) (Fwd) Re: DSS's for UK use Dr Derek Morgan wrote <<(i) DSS means different things to different people and whereas one farmer would say he/she is using a DSS the next would not, even though they are using the same approaches. Additionally, no clear sandard definition adds to the confusion; <<(ii) DSS is a new technology still for farmers and consultants, although this is changing. Without question some DSS are being used on farms but very few have made the transition from research projets into practical and viable tools. I agree. We developed a number of DSS products over the yrs. Very few have really gotten into wide use. Of particular note is CALEX/Cotton, an expert system for Calif cotton production. We reached very few people due mostly to the problem of using technology to transfer technology. Desktops and even laptops were too cumbersome to use in the real world of pest and crop management. The break through came with conversion of the essential elements to Lotus 123 macros and making it available on relatively inexpensive palmtops like HP95,100, 200. The use of this technology has allowed the program to gain much greater distribution and accpetance than the original format. However, the integrated aspects of the PC version was lost, but real time decisions can be made. For those interested, I have an article available which describes some of the constraints we encountered developing and delivering our expert system. Please request directly from me (pbgoodell@uckac.edu) and I will forward to you or look it up yourself: Goodell, P.B., J.F. Strand, and M.M. Ostergard. 1993. Delivering expert systems to agriculture: Experiences with CALEX/Cotton. Artificial Intelligence Applications in Natural Resource Management. 7 (2&3):14-20. Best regards. PETER B. GOODELL, Ph.D 209 891-2500V 8912593F IPM Advisor/Extension IPM Coordinator Kearney Ag Center ^^^^^ ////
Date: Wed, 15 Nov 95 17:38:42 EST From: DON WAUCHOPE <DON@tifton.cpes.peachnet.edu> Subject: Re: Pesticide Properties Database (fwd) On Mon, 13 Nov 1995 13:14:31 -0600 Robert Caldwell said: ...(snip) >The two best sources of information on the data format standards are the >technical documentation to DSSAT (DSSAT version 3, volume 2; G. Tsuji, G. >Uehara, and S. Balas; contact via 'ibsnat@Hawaii.edu', or use my >departmental address, below) and Uhlir, P.F. and G.C. Carter. 1994. >Crop modeling and related environmental data. CODATA Monograph Series, >Volume 1. CODATA, 51 Boulevard de Montmorency, 75016 Paris. ...(snip) I am going to contact them. ... >database on label information. The cost of the database would be a small >fraction of the labelling process, and we (researchers, extension agents, >teachers, NRCS staff, EPA staff, and farmers) would be more accurate and >more efficient in finding the label information we need. ... I have been informed by Paul Hendley of Zeneca that there is in fact a data- base system for labels in existence, but I think it may not be free. Apparently it is a valuable tool because it allows comparison of labels on a section-by-section basis. If I can find out more I will let you know (or perhaps Paul, who will no doubt see this, might throw some enlightenment our way... Don Wauchope
Date: Thu, 16 Nov 1995 10:09:23 +1030 (CST) From: "P. Grace" <gracep@adl.soils.csiro.au> Subject: Re: DSS's for UK use Just to follow on from Simon Woodward, we have been doing a similar thing in Australia with the simplification of complex models and making them available either as user friendly packages (e.g. SOCRATES..which looks at changes in soil organic C in farming systems) or hand held slide rules (e.g. Organic Matter Calculator and N Calculator). SOCRATES is more an educational tool for use by extension agents, students and some farmers whilst the Calculators are more for "one-foot-in-the-field" use. SOCRATES and the C calculator are pretty robust, SOCRATES also has a parameter editor. The N calculator would need quite a bit of re-calibration out of southern Australia. Wayne Meyer of CSIRO Water Resources (wayne@griffith.dwr.csiro.au) has been actively involved in DSS's for irrigated cropping and is worth contacting. Peter Grace Leader Soil Organic Matter s/p Cooperative Research Centre for Soil and Land Management and University of Adelaide PMB 2, Glen Osmond South Australia 5064 Phone 618 3038520 FAX 618 3038556
Date: Thu, 16 Nov 1995 09:27:46 +0000 From: Graham Russell <GRUSSELL@srv0.bio.ed.ac.uk> Subject: Modellers in the UK only! Dear agmodellers, I would also appreciate the information requested by Caroline Parker about DSSs. The CAMASE concerted action is compiling a list of crop and farm models and is about to start on those produced in the UK. Version 1 of the register of agro-ecosystem models covers those produced in the Netherlands. DSS models might come within the remit of the publication. More information later. 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
Date: Thu, 16 Nov 1995 11:53:31 +0000 From: AUDSLEY <eric.audsley@bbsrc.ac.uk> Subject: Re: Modellers in the UK only! >Dear agmodellers, I would also appreciate the information >requested by Caroline Parker about DSSs. The CAMASE >concerted action is compiling a list of crop and farm >models and is about to start on those produced in the UK. >Version 1 of the register of agro-ecosystem models covers >those produced in the Netherlands. DSS models might come >within the remit of the publication. More information >later. >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 I guess you will already have seen the U.K. Register of Agricultural Models (1990) by Geoff Squire and Paul Hamer. ------------------------- Eric Audsley Silsoe Research Institute Wrest Park Silsoe Beds MK45 4HS UK Tel: +44 1525 860000 Fax: +44 1525 860156 Email: Eric.Audsley@BBSRC.AC.UK (Internet) G=ERIC;S=AUDSLEY;O=BBSRC;P=UK.AC;C=GB (X-400)
Date: Thu, 16 Nov 1995 12:23:20 GMT From: Derek Morgan <dm00hp@csl.gov.uk> Subject: Re: Modellers in the UK only! > > Dear agmodellers, I would also appreciate the information > requested by Caroline Parker about DSSs. The CAMASE > concerted action is compiling a list of crop and farm > models and is about to start on those produced in the UK. > Version 1 of the register of agro-ecosystem models covers > those produced in the Netherlands. DSS models might come > within the remit of the publication. More information > later. > 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 > Graham Geoff Squire & Paul Hamer compiled, and published in 1990, a register of mathematical/computer models used in agricultural research and extension in the UK. The register arranged models into sections according to subject and purpose. Over 160 models were described. Obviously, much has happened since 1990 but it might be a good starting point. Derek Dr Derek Morgan Central Science Laboratory, Harpenden, Herts. UK. AL5 2BD e-mail - d.morgan@csl.gov.uk telephone - (+44) (0)1582 715241 fax - (+44) (0)1582 762178
End of Digest
>From root@crcnis1.unl.edu Fri Nov 17 18:47 EST 1995
Date: Fri, 17 Nov 1995 12:26:13 -0600
Message-Id: <199511171826.AA23414@crcnis1.unl.edu>
Subject: AGMODELS-L digest 393

Contents:
Electronic Journal? (nick@vt.edu (Nick Stone))
Re: Electronic Journal? ("Ricardo J. Salvador" <rjsalvad@iastate.edu>)
Re: Electronic Journal? (Tom Hodges <thodges@beta.tricity.wsu.edu>)
Re: Electronic Journal? (John Turner rm.6549 <turner@axp6.ccc.usda.gov>)



Date: Fri, 17 Nov 1995 09:12:53 -0500 From: nick@vt.edu (Nick Stone) Subject: Electronic Journal? I was reviewing some early correspondence on this list and came across the following from Tom Hodges, two years ago today: >Date: Wed, 17 Nov 1993 13:37:41 -0600 >From: Tom Hodges <thodges@beta.tricity.wsu.edu> >To: Multiple recipients of list <agmodels-l@unl.edu> >Subject: Re: New Mailing groups for Soils and AgModels (fwd) >This new list developed out of the discussion in the American Society >of Agronomy to establish a peer-reviewed electronic journal for >publishing ag-models and model-related databases. Hopefully the >e-journal will be given preliminary approval soon. Tom I strongly support this idea and would like to know: what is the status of the electronic journal for ag-models and databases? --Nick Stone ----------------------------------------------------------------- Nicholas D. Stone ISIS Lab Department of Entomology Phone: (540) 231-6885 202 Price Hall FAX: (540) 231-9131 Virginia Tech Internet: nick@vt.edu Blacksburg, VA 24060 BITNET: nstone@vtvm1 On the WWW: http://www.ento.vt.edu/Personnel/Professors/NDSInfo.html ----------------------------------------------------------------- <| /| / | / |\ "Old sailors never die, / | \ they just get a little dinghy" /____| \ __O___|---\ ~~~\~~~~~~~~/~~~~~~~
Date: Fri, 17 Nov 1995 09:40:46 -0700 From: "Ricardo J. Salvador" <rjsalvad@iastate.edu> Subject: Re: Electronic Journal? On Fri, 17 Nov 1995 08:04:44 -0600 nick@vt.edu (Nick Stone) wrote: >I was reviewing some early correspondence on this list and came across the >following from Tom Hodges, two years ago today: > >>This new list developed out of the discussion in the American Society >>of Agronomy to establish a peer-reviewed electronic journal for >>publishing ag-models and model-related databases. Hopefully the >>e-journal will be given preliminary approval soon. > >I strongly support this idea and would like to know: what is the status of >the electronic journal for ag-models and databases? The journal has been approved on a "test" basis. An editorial board and editor have been named. The journal's name will be "Electronic Journal of Terrestrial and Ecosystems Software" (EJTES), and a "shell" for its distribution has been established on the WWW at: http://www.arsusda.gov/ejtes/ An editorial policy and rationale for the journal are available at this site. The journal will be peer reviewed and will be accessible on a subscription basis. The basic premise of the journal is that program code, relevant data sets, and meaningful articles should be available in their most current fashion to people who can make the best use of them, and should not be detained by the excessively long review cycles and page limitations that have been developed for print journals. The editor is Basil Acock, who may be contacted for further info at: bacock@asrr.arsusda.gov. Ricardo Salvador Internet: salvador@IASTATE.EDU 1126 Agronomy Hall Iowa State University Voice: (515) 294-9595 Ames, IA 50011-1010 FAX: (515) 294-3163 <http://www.public.iastate.edu/~rjsalvad/homepage.html>
Date: Fri, 17 Nov 1995 07:44:12 -0800 (PST) From: Tom Hodges <thodges@beta.tricity.wsu.edu> Subject: Re: Electronic Journal? Basil Acock should speak to this also but I will try. The electronic journal for ag-models and databases is almost going. There is an editorial board and a web site. http://www.arsusda.gov/EJTES The journal: Electronic Journal of Terrestrial Ecosystem Software, is sponsored by the ASA, temporarily housed at the ASRR lab in Beltsville. Tom thodges@beta.tricity.wsu.edu On Fri, 17 Nov 1995, Nick Stone wrote: > I was reviewing some early correspondence on this list and came across the > following from Tom Hodges, two years ago today: > > >Date: Wed, 17 Nov 1993 13:37:41 -0600 > >From: Tom Hodges <thodges@beta.tricity.wsu.edu> > >To: Multiple recipients of list <agmodels-l@unl.edu> > >Subject: Re: New Mailing groups for Soils and AgModels (fwd) > > >This new list developed out of the discussion in the American Society > >of Agronomy to establish a peer-reviewed electronic journal for > >publishing ag-models and model-related databases. Hopefully the > >e-journal will be given preliminary approval soon. Tom > > I strongly support this idea and would like to know: what is the status of > the electronic journal for ag-models and databases? > --Nick Stone > > > ----------------------------------------------------------------- > Nicholas D. Stone ISIS Lab > Department of Entomology Phone: (540) 231-6885 > 202 Price Hall FAX: (540) 231-9131 > Virginia Tech Internet: nick@vt.edu > Blacksburg, VA 24060 BITNET: nstone@vtvm1 > > On the WWW: > http://www.ento.vt.edu/Personnel/Professors/NDSInfo.html > ----------------------------------------------------------------- > <| > /| > / | > / |\ "Old sailors never die, > / | \ they just get a little dinghy" > /____| \ > __O___|---\ > ~~~\~~~~~~~~/~~~~~~~ > > >
Date: Fri, 17 Nov 1995 12:58:47 -0500 From: John Turner rm.6549 <turner@axp6.ccc.usda.gov> Subject: Re: Electronic Journal? For anyone who may be having trouble, the last 5 characters of the URL, "ejtes", should be in lower case to access the web page.
End of Digest
>From root@crcnis1.unl.edu Tue Nov 21 17:09 EST 1995
Date: Tue, 21 Nov 1995 10:44:50 -0600
Message-Id: <199511211644.AA17078@crcnis1.unl.edu>
Subject: AGMODELS-L digest 394

Contents:
Crop chloride content (wstites@fsmail.uwsp.edu)



Date: Tue Nov 21 09:27:00 CST 1995 From: wstites@fsmail.uwsp.edu Subject: Crop chloride content Greetings, agmodelers and soils listers Can anyone give me an idea of the chloride content of sweet corn, field corn, or potato? I'm interested in the content of the standing crop at harvest time, that is, I ultimately want to know the kg/ha of Cl taken up during the season. References to published values, or your personal recollections, would be helpful. I have been advised this content varies a lot, and the plants tend to take all they can get. The conditions I have are a sandy soil, where nearly all the Cl is applied as KCl about a month before the crop is planted, so probably 6 weeks before emergence. My feeling is that these conditions would result in rather low Cl uptake. If you'd rather respond privately than to the list, my e-mail address is below. Thanks.... Will Stites Central Wisconsin Groundwater Center 109 Nelson Hall, UW-Stevens Point Stevens Point, Wisconsin 54481 715-346-4501 wstites@fsmail.uwsp.edu
End of Digest
>From root@crcnis1.unl.edu Wed Nov 22 17:06 EST 1995
Date: Wed, 22 Nov 1995 10:45:09 -0600
Message-Id: <199511221645.AA04488@crcnis1.unl.edu>
Subject: AGMODELS-L digest 395

Contents:
First posting. (Grant Upchurch <UPCHURCH@ECCLES.NZDRI.Org.NZ>)
      Introducing Matthew Laurenson ("Matthew Laurenson" <mlaurenson@hort.cri.nz>)
Introduction (hga1@cornell.edu (Heather G. Allore))



Date: 22 Nov 1995 13:50:31 +1200 From: Grant Upchurch <UPCHURCH@ECCLES.NZDRI.Org.NZ> Subject: First posting. Hi AgModelers, As an intro (requested by Jerome upon subscribing) my name is Grant Upchurch and I am a Research Scientist at the New Zealand Dairy Research Institute investigating the effect of dairy factory wastewaters on soils. I have been using a CSIRO model called SWIM to model existing soil moisture data from TDR probes for irrigation events. So far we have performed a sensitivity analysis and calibrated it for a single site and are presently in the process of testing that initial calibration. The results look promising -- has anyone else had any experience with SWIM ? Regards, Grant Upchurch
Date: Wed, 22 Nov 1995 16:19:21 GMT+1200 From: "Matthew Laurenson" <mlaurenson@hort.cri.nz> Subject: Introducing Matthew Laurenson > 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. affiliations - see signature I'm trying to develop an integrating framework for decision support models for orchard managers. To this end we've developed weather-based tools (apple scab, growing degrees) and a spray diary package as a demonstration of the concept. We have around 70 clients paying around US$500 per annum to use the software. burning issue... I think the biggest issue facing us is knowledge representation. The tools we have - mathematical models, relational tables, rules don't handle many of the sort of relationships that exist in biological systems (this is made up of these, this is a type of...). Do object oriented models hold the answer? Looking forward to listening and learning Matthew Laurenson HortResearch Batchelar Research Centre Private Bag 11030 or Tennent Drive PALMERSTON NORTH MLaurenson@Hort.CRI.NZ ph +64-6-356 8080 (operator) +64-6-351 7039 (direct) fax+64-6-354 6731
Date: Wed, 22 Nov 1995 09:21:25 -0500 From: hga1@cornell.edu (Heather G. Allore) Subject: Introduction Hi, My name is Heather Allore and I am completing my PhD in Animal Science at Cornell University. I have developed a decision support system for evaluating mastitis control in dairy herds. My current project is a stochastic discrete-event simulation model of contagious mastitis in dairy herds. I notice that most of you are involved with crops and soils, are there other animal or disease modelers out there? Heather G. Allore Graduate Research Assistant Cornell University 112 Morrison Hall Ithaca, NY 14853-4801 USA e-mail:hga1@cornell.edu PH:(607) 255-7973
End of Digest
>From root@crcnis1.unl.edu Thu Nov 23 17:08 EST 1995
Date: Thu, 23 Nov 1995 10:45:19 -0600
Message-Id: <199511231645.AA13769@crcnis1.unl.edu>
Subject: AGMODELS-L digest 396

Contents:
Re: Introduction (blincoe@med.unr.edu (Clifton Blincoe))
Another animal modeler (Mark L Kinsel <kinse002@maroon.tc.umn.edu>)
      Markov Chain (MOHAMMAD BANNYAN AVVAL <SBXBAM@sbn2.phes.nottingham.ac.uk>)
Marketing Models (Jim Meade <jnmeade@blue.weeg.uiowa.edu>)



Date: Wed, 22 Nov 1995 17:16:35 GMT From: blincoe@med.unr.edu (Clifton Blincoe) Subject: Re: Introduction With regard to Ms. Allore's introduction, I too was wondering if there were any other animal modelers in the group. I have been simulation micronutrient and nuclear fallout trace element metabolism for about 20 years. My most recent work was on copper metabolism in cattle, rats and man--normal, deficiency and diseas. I also ask, 'are there otheer animal or disease modelersout there? Clifton Blincoe Professor of Biochemistry, Emeritus [i.e.retired old goat]
Date: Wed, 22 Nov 1995 19:49:52 -0600 (CST) From: Mark L Kinsel <kinse002@maroon.tc.umn.edu> Subject: Another animal modeler Dear colleagues: My name is Mark Kinsel and I am another animal modeler working with decision support systems for dairy enterprises. I am currently finishing expansion of the DairyORACLE model - a computer simulation of dairy production - to include disease and treatment effects. We are using this model to evaluate culling and replacement decisions under different herd conditions and facility types. I am also working on developing expert systems for herd level diagnostics. You can reach me at either of my email accounts - mkinsel@micron.net or kinse002@maroon.tc.umn.edu. Mark Kinsel, Assistant Professor Caine Veterinary Teaching Center 1020 E. Homedale Rd. Caldwell, ID 83605-8098 208-454-8657
Date: Thu, 23 Nov 1995 09:49:43 GMT From: MOHAMMAD BANNYAN AVVAL <SBXBAM@sbn2.phes.nottingham.ac.uk> Subject: Markov Chain Does anyone know about any refrences on using Markov Chain technique in crop yield frecasting? I would appreciate if you let me know too. Mohammad Bannayan University of nottingham sbxbam@sbn2.nott.ac.uk
Date: Thu, 23 Nov 1995 06:00:31 -0600 (CST) From: Jim Meade <jnmeade@blue.weeg.uiowa.edu> Subject: Marketing Models Does anyone know of crop marketing models? I'm thinking of doing some simple spreadsheet models of prices versus bushels raised and then trying to find some strategies that minimize risk and maximize profits from '96 corn and soybean production. Jim - Farmer - Iowa City, IA, jnmeade@blue.weeg.uiowa.edu
End of Digest
>From root@crcnis1.unl.edu Fri Nov 24 17:21 EST 1995
Date: Fri, 24 Nov 1995 10:50:10 -0600
Message-Id: <199511241650.AA23013@crcnis1.unl.edu>
Subject: AGMODELS-L digest 397

Contents:
RE: Marketing Models  (lpachepsky@asrr.arsusda.gov)
Re: Marketing Models  (Hungerorg@aol.com)
Intro (iain@stams.strath.ac.uk (Iain McKendrick))
Re: Markov Chain (griggs@brcsun0.tamu.edu)
      Re: Markov Chain (MOHAMMAD BANNYAN AVVAL <SBXBAM@sbn2.phes.nottingham.ac.uk>)



Date: Thu, 23 Nov 95 17:51:54 PST From: lpachepsky@asrr.arsusda.gov Subject: RE: Marketing Models On Thu, 23 Nov 1995 05:54:51 -0600 Jim Meade wrote: >Does anyone know of crop marketing models? I'm thinking of doing some >simple spreadsheet models of prices versus bushels raised and then trying >to find some strategies that minimize risk and maximize profits from '96 >corn and soybean production. > > >Jim - Farmer - Iowa City, IA, >jnmeade@blue.weeg.uiowa.edu > > > Yes, there are such models and I suppose a lot of them. At least there is a journal Rev. Marketing and Agric. Econom., and its vol. 43 was published in 1974. When I prepared a review on the model validation I found that the most advanced approach to the problem existed in the economic modeling (several years ago). Several refs I have on hand, just to begin a search with. Anderson, J.R. Simulation: methodology and applications in agricultural economics. Rev. Marketing and Agirc. Econom. 43, 3-55 Fishman, G. & Kiviat, P.J. 1967. The analysis of simulation-generated time series. Management Sci., 13, 525-57 (Article is not relevant but the journal title is very suggestive. Hope it still exists) Johnson, S.R. & Rausser, G.C. 1977. System analysis and simulation: a survey of applications in agricultural and resource economics. In A Survey of Agricultural Economics Literature, ed. L. R. Martin. University of Minnesota Press, Minneapolis. You can also ask your question Dr. Terry Kelly, he knows all about it. His e-mail address is T.C.Kelly@massey.ac.uz Good luck and happy Thanksgiving to everyone! Luda ------------------------------------- Name: Ludmila Pachepsky Systems Research Lab Bldg 007, Rm 008 BARC-W 10300 Baltimore Ave. Beltsville, MD 20705 301-504-6042 (voice) 301-504-5823 (fax) E-mail: lpachepsky@asrr.arsusda.gov ------------------------------------- 11/23/95 17:38:43
Date: Thu, 23 Nov 1995 19:54:29 -0500 From: Hungerorg@aol.com Subject: Re: Marketing Models Seems like there should be some straightforward spreadsheet templates available. I have heard of some simple models that include price/quantity of crop inputs developed by sustainable ag people to show sustainable crop economies vs. regular. It was my idea that the Leopold Center,(is that in Ames?) and Ia. Extension were leaders.
Date: Fri, 24 Nov 1995 10:03:29 +0000 (GMT) From: iain@stams.strath.ac.uk (Iain McKendrick) Subject: Intro Dear Colleagues, I am a mathematical modeller/statistician working on decision support for African dairy production. My work is carried out in asociation with other statisticians and modellers here at the University of Strathclyde, Information Scientists from Strathclyde, vets from Glasgow veterinary school and vets/production people from ILRI in Nairobi. As part of this work, I have been working on models for vector borne cattle disease, and helping colleagujes work on expert systems for tryanosomiasis and East Coast fever in cattle. I have been trying to think about the links between stochastic simulation modelling, statistical modelling of data, deterministic models and general information handling. That'sa a lot to think about!! Iain McKendrick
Date: Fri, 24 Nov 1995 09:43:54 -0500 From: griggs@brcsun0.tamu.edu Subject: Re: Markov Chain The WGEN or WXGEN weather generator used in the EPIC model uses Markov Chain technique and EPIC is one of the few, multiple crop simulation models which simulates the response of crop growth and yields to weather. There are numerous citations usually with the lead author being Dr. Clarence Richardson, USDA-ARS, Temple, Texas. 1. Richarson, C.W. and A. D. Nicks. 1990. Weather Generator description. Chp. 3. pp. 93-104 In: A. N. Sharpley and J. R. Williams (eds) EPIC --Erosion/Productivity Impact Calculator: 1. Model Documentation. USDA Techn. Bull. No. 1768. 235 pp. 2. Nicks, A. D., Richardson, C. W., and Williams, J. R. 1990. Evaluation of the EPIC model weather generator. Chp. 4 of the same publication above. 3. Richarson, C.W. and D. A. Wright. 1984. WGEN: A model for generating daily weather variables. USDA, ARS-8. August 1984. Dr. Richarson is located at the USDA-ARS Grassland, Soil and Water Research Lab, 808 East Blackland Road, Temple, Texas, 76502. (817) 770-6517 Good luck, Ray H. Griggs >Does anyone know about any refrences on using Markov Chain technique >in crop yield frecasting? I would appreciate if you let me know too. > >Mohammad Bannayan >University of nottingham >sbxbam@sbn2.nott.ac.uk
Date: Fri, 24 Nov 1995 15:35:10 GMT From: MOHAMMAD BANNYAN AVVAL <SBXBAM@sbn2.phes.nottingham.ac.uk> Subject: Re: Markov Chain As you can see they all have used this technique in weather forecasting and not directly in crop yield prediction. I am currently using this technique on wheat yield forecasting but I want to find some similar works on this or other crops. Anyway, thank you for your consideration. Mohammad
End of Digest
>From root@crcnis1.unl.edu Mon Nov 27 08:54 EST 1995
Date: Mon, 27 Nov 1995 02:41:30 -0600
Message-Id: <199511270841.AA12394@crcnis1.unl.edu>
Subject: AGMODELS-L digest 398

Contents:
 (B.Maheshwari@uws.edu.au (Basant Maheshwari))



Date: Mon, 27 Nov 1995 19:15:34 +1000 From: B.Maheshwari@uws.edu.au (Basant Maheshwari) Subject: set agmodels-l nomail
End of Digest
>From ab4el@ab4el.com Tue Nov 28 00:01 EDT 1995
Date: Tue, 28 Nov 1995 00:01:00 -0500
Message-Id: <19950920000100.ab4el@ab4el.com>
Subject: AGMODELS-L digest 399 was NOT received

AGMODELS-L digest 399 was NOT received



>From root@crcnis1.unl.edu Wed Nov 29 08:54 EST 1995
Date: Wed, 29 Nov 1995 02:42:22 -0600
Message-Id: <199511290842.AA25256@crcnis1.unl.edu>
Subject: AGMODELS-L digest 400

Contents:
Re: Marketing Models (Chris Butts <cbutts@asrr.arsusda.gov>)



Date: Tue, 28 Nov 1995 08:38:10 -0500 (EST) From: Chris Butts <cbutts@asrr.arsusda.gov> Subject: Re: Marketing Models On Thu, 23 Nov 1995, Jim Meade wrote: > Does anyone know of crop marketing models? I'm thinking of doing some > simple spreadsheet models of prices versus bushels raised and then trying > to find some strategies that minimize risk and maximize profits from '96 > corn and soybean production. > Contact Marshall Lamb, ag economist at the USDA, ARS, National Peanut Research Laboratory, 1011 Forrester Drive, SE, Dawson, Georgia 31742 or via phone 912-995-7417. He has developed multi-year, multi-crop planning models using Quattro Pro for Windows. ******************************************************************** * 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 * ********************************************************************
End of Digest
>From root@crcnis1.unl.edu Thu Nov 30 08:59 EST 1995
Date: Thu, 30 Nov 1995 02:43:08 -0600
Message-Id: <199511300843.AA19236@crcnis1.unl.edu>
Subject: AGMODELS-L digest 401

Contents:
Price models (lpachepsky@asrr.arsusda.gov)
Re: No Subject (DBECKWRITE@aol.com)
Re: Marketing Models (DBECKWRITE@aol.com)



Date: Wed, 29 Nov 95 16:44:37 PST From: lpachepsky@asrr.arsusda.gov Subject: Price models Concerning models for crop prices predictions I have asked my friend economist. On Wed, 29 Nov 1995 15:34:35 -0500 Philip Colling wrote: >Regarding the performance of agricultural price forecasting models, the >two references are good places to start: > >Bessler, D.A. and J.A. Brant. "An Analysis of Forecasts of Livestock >Prices." Journal of Economic Behavior and Organization. >18(1992):249-263. > >Gerlow, M.E., S.H. Irwin and T.R. Liu. "Economic Evaluation of >Commodity Price Forecasting Models." International Journal of >Forecasting. 9(1993)387-397. > >I have not kept up with this literature in the recent future. However, I will >try to identify more sources. The International Journal of Forecasting >should have many good articles regarding model performance and >validation. Phil > > ------------------------------------- Name: Ludmila Pachepsky Systems Research Lab Bldg 007, Rm 008 BARC-W 10300 Baltimore Ave. Beltsville, MD 20705 301-504-6042 (voice) 301-504-5823 (fax) E-mail: lpachepsky@asrr.arsusda.gov ------------------------------------- 11/29/95 16:44:37
Date: Wed, 29 Nov 1995 18:37:02 -0500 From: DBECKWRITE@aol.com Subject: Re: No Subject Please take me off of this listserv. Thank you.
Date: Wed, 29 Nov 1995 18:39:21 -0500 From: DBECKWRITE@aol.com Subject: Re: Marketing Models Dear Jim: We are farmers in Northeast Nebraska and I was interested in the @ Risk software you were asking about. Could you send us a few lines about it? Thanks. Tom
End of Digest
AGROMOMY Homepage @ SunSITE


Prepared by Steve Modena, AB4EL
Suggestions and comments to: modena@SunSITE.unc.edu