AGMODELS-L: 199605XX

is the compilation of discussion during May 96

via AB4EL Web Digests @ SunSITE

AGROMOMY Homepage @ SunSITE


>From root@crcnis1.unl.edu Thu May  2 06:09 EDT 1996
Date: Thu, 2 May 1996 04:51:53 -0500
Message-Id: <199605020951.AA12056@crcnis1.unl.edu>
Subject: AGMODELS-L digest 490

Contents:
Water Use Efficiency for Potatoes (Tim Hess <T.Hess@cranfield.ac.uk>)



Date: Thu, 2 May 1996 08:38:12 +0000 From: Tim Hess <T.Hess@cranfield.ac.uk> Subject: Water Use Efficiency for Potatoes Does anyone have any data / results on water use efficiency and / or transpiration efficiency of potatoes grown in temperate climates. One of my research students wants to compare figures from Potugal. --------------------------------------------------------------------- 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 ----------------------------------------------------------------------
End of Digest
>From root@crcnis1.unl.edu Fri May  3 06:06 EDT 1996
Date: Fri, 3 May 1996 04:53:57 -0500
Message-Id: <199605030953.AA08051@crcnis1.unl.edu>
Subject: AGMODELS-L digest 491

Contents:
 (jiyun@iastate.edu)



Date: Thu, 2 May 1996 20:05:45 -0500 From: jiyun@iastate.edu Subject: Hot pepper model I am a visiting scholar at Iowa State University, Ames, Iowa. I am searching for crop growth models which could be utilized to project the effects of local climate change around artificial lakes in Korea on the potential productivity of major crops grown there. Paddy rice and hot pepper are the crops with economic importance in this region, and farmers say reduced yields due to lowered temperature and solar irradiance. CERES-rice and ORYZA1 will be used for rice, but little information is available for hot pepper. If anyone know of any hot pepper (Capsicum frutescens [Solanaceae]) model or any other model that could be adapted to, please give me the information. Sincerely, Jin I. Yun [After June 1, 1996] 2104 Agronomy Hall Agronomy Department Ames, IA50011 Kyung Hee University (515)294-1923 Suwon 449-701, KOREA jiyun@iastate.edu jiyun@nms.kyunghee.ac.kr
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>From root@crcnis1.unl.edu Sat May  4 06:05 EDT 1996
Date: Sat, 4 May 1996 04:56:48 -0500
Message-Id: <199605040956.AA02386@crcnis1.unl.edu>
Subject: AGMODELS-L digest 492

Contents:
     Journal Article ("Oscar Monje" <OSCAR@mendel.usu.edu>)
intro ("Goering, Matt" <goering@mycogen.com>)



Date: Fri, 3 May 1996 15:56:51 MST7MDT From: "Oscar Monje" <OSCAR@mendel.usu.edu> Subject: Journal Article Hello. I cannot find an article citation of 'Geo-Biosphere Processes' in our library. I'm looking for: Pigla, U & Claus,St. 1993. Two leaf temperature models of winter wheat. Model. Geo-Biosphere Processes, 2: 67-82. Is this an European journal? Any info is welcome. Thanks in advance Oscar Monje Crop Physiology Lab -------------------------- oscar@mendel.usu.edu http://cc.usu.edu/~slktt/oscar.html
Date: Fri, 03 May 96 18:18:00 CDT From: "Goering, Matt" <goering@mycogen.com> Subject: intro Hi everybody; My name is Matt Goering. I am a researcher at Mycogen corporation. We produce environmentally compatible pesticides; (both insecticides and herbicides) and agricultural seeds (corn, cotton, sorghum, sunflower etc.) I am not currently doing any modeling, but I would like to educate myself as to where it is and is not useful. My primary area of study is weed science (weed ecology in cropland). Most of my experience is in empirical work, but I can imagine lots of ways to incorporate computer models into planning. There must be predicitive programs for cropping situations. For instance, what would happen to the yield of corn in this state if I did not control bindweed, but I didn't control the canada thistle..... I look forward to learning from your conversations Matt Goering goering@mycogen.com
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>From root@crcnis1.unl.edu Sun May  5 06:03 EDT 1996
Date: Sun, 5 May 1996 04:54:18 -0500
Message-Id: <199605050954.AA16279@crcnis1.unl.edu>
Subject: AGMODELS-L digest 493

Contents:
RE: Journal Article  (ypachepsky@asrr.arsusda.gov)



Date: Fri, 3 May 96 22:02:48 PDT From: ypachepsky@asrr.arsusda.gov Subject: RE: Journal Article Modeling of Geo-Biosphere Processes is an European journal that has been published by CATENA-FERLAG and recently has been merged with Ecological modeling of Elsevier. Librarians can find it by ISSN 0938-9563. Regards Yakov Pachepsky ---------------Original Message--------------- Hello. I cannot find an article citation of 'Geo-Biosphere Processes' in our library. I'm looking for: Pigla, U & Claus,St. 1993. Two leaf temperature models of winter wheat. Model. Geo-Biosphere Processes, 2: 67-82. Is this an European journal? Any info is welcome. Thanks in advance Oscar Monje Crop Physiology Lab -------------------------- oscar@mendel.usu.edu http://cc.usu.edu/~slktt/oscar.html ----------End of Original Message---------- ------------------------------------- Name: yakov pachepsky E-mail: ypachepsky@asrr.arsusda.gov (yakov pachepsky) USDA:ARS:BA:NRI:RMSL Bldg 007 Rm 008 BARC-WEST Beltsville, MD 20705 Tel 301-504-74-68 Fax 301-504-58-23 -------------------------------------
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>From root@crcnis1.unl.edu Mon May  6 14:40 EDT 1996
Date: Mon, 6 May 1996 13:30:58 -0500
Message-Id: <199605061830.AA19457@crcnis1.unl.edu>
Subject: AGMODELS-L digest 494

Contents:
     Bio-Geosphere Articles ("Oscar Monje" <OSCAR@mendel.usu.edu>)



Date: Mon, 6 May 1996 12:12:49 MST7MDT From: "Oscar Monje" <OSCAR@mendel.usu.edu> Subject: Bio-Geosphere Articles Thanks to all for helping with these articles! The responses have been warm and informative! Oscar Monje Crop Physiology Lab -------------------------- oscar@mendel.usu.edu http://cc.usu.edu/~slktt/oscar.html
End of Digest
>From root@crcnis1.unl.edu Thu May  9 13:54 EDT 1996
Date: Thu, 9 May 1996 12:40:27 -0500
Message-Id: <199605091740.AA18807@crcnis1.unl.edu>
Subject: AGMODELS-L digest 495

Contents:
information "Water Quality in Agriculture" (preti@unitus.it (federico preti))



Date: Thu, 9 May 1996 19:30:00 +0200 From: preti@unitus.it (federico preti) Subject: information "Water Quality in Agriculture" Thanks to all for helping with the information about "Water Quality in Agriculture"! The responses have been very kind and informative! Federico
End of Digest
>From root@crcnis1.unl.edu Mon May 13 16:55 EDT 1996
Date: Mon, 13 May 1996 15:40:01 -0500
Message-Id: <199605132040.AA20112@crcnis1.unl.edu>
Subject: AGMODELS-L digest 496

Contents:
Presentation (barbara@cnpms.embrapa.br)



Date: Thu, 9 May 96 16:38:58 EDT From: barbara@cnpms.embrapa.br Subject: Presentation I am joining AGMODELS-L discussion list and was requested to make an introduction of myself and of my main interests: Name: Barbara Heliodora Machado Mantovani, Agronomist, 1973, Master Degree in Agricultural Engineering, 1976, Federal University of Vigosa, Minas Gerais, Brazil. PhD in Agricultural Engineering, 1983, Purdue University, working under the advice of Dr. R. M. Peart, developing simulation model for harvesting and transportation of biomass materials for use at an alcohol plant. Currrent position: researcher with the Brazilian Corporation for Agriculture Research, at the National Maize and Sorghum Research Center, located in Sete Lagoas, MG, Brazil. Main interest: crop simulation models, specially CERES-maize and sorghum.
End of Digest
>From root@crcnis1.unl.edu Tue May 14 17:55 EDT 1996
Date: Tue, 14 May 1996 16:43:09 -0500
Message-Id: <199605142143.AA18172@crcnis1.unl.edu>
Subject: AGMODELS-L digest 497

Contents:
Re: Presentation (nino@bamboo.mluri.sari.ac.uk (Caetano Pace))
     Free Book (DON WAUCHOPE <DON@tifton.cpes.peachnet.edu>)
     Animation (DON WAUCHOPE <DON@tifton.cpes.peachnet.edu>)
RE: Animation (Frits van Evert <fvevert@Soils.Umn.EDU>)
Re: Animation ("Rabi H. Mohtar" <RHM8@PSUVM.PSU.EDU>)
Re: Free Book (Jracht3@aol.com)
Re: Free Book (alogden@sun1.ortho.lsumc.edu (Al Ogden))
Re: Free Book (Daniel Fuka <dan@quetzalcoatl.com>)



Date: Tue, 14 May 1996 11:15:29 +0100 From: nino@bamboo.mluri.sari.ac.uk (Caetano Pace) Subject: Re: Presentation Dear Barbara, I just read your presentation, and I thought you could probably help me with the issue I am dealing with at the moment. What I am doing at the moment is a simulation of crop growth (mainly cereals) in Scotland, in oreder to assess the susceptability to soil erosion troughout the cropping year. I am basically using some equation taken from the EPIC model, but I can't run EPIC straightforward, because of the lack of input data, and because of the size of the study area (the whole Scotland). Having said that, could you please let me know if you have been using EPIC, so that I can ask you some specific questions about some of the parameters in the model equations. Is it possible to apply the CERES model to different kind cereals and to a large scale study area ? Thank you in advance for your kind cooperation, and I look forward to hearing from you soon. Regards Gaetano Pace _________________________________________ Gaetano PACE Land Use Division The Macaulay Land Use Research Institute Craigiebuckler, ABERDEEN SCOTLAND UK e-mail: mi575@mluri.sari.ac.uk Tel.: +44 - 1224 - 318611 Fax.: +44 - 1224 - 311556 _________________________________________
Date: Tue, 14 May 96 10:27:24 EDT From: DON WAUCHOPE <DON@tifton.cpes.peachnet.edu> Subject: Free Book I have just found about 50 copies of an ARS publication authored by myself and Ed Woolson 10 years ago entitled "Arsenic and Arsenical Pesticides: a Bibliography of Technical Publications on Uses, Environmental Chemistry and Health Effects". This is about a 2" thick computer listing of about 3500 articles on the subject, arranged in alpha order by first author and with an all-author and keyword index as well. Subjects covered: As analysis, especially AAS; toxicology and metabolism, esp. plants; environmental fate and behavior; pollution; soil chemistry and soil microbioogy; human exposure. I hate to throw these away as they should be useful to anybody studying As or other Group V compounds in the environment. Anybody want a free copy? I will mail to anyone who sends me their address--while supplies last. Don PS--foreign requests will be sent by slow boat.
Date: Tue, 14 May 96 10:29:34 EDT From: DON WAUCHOPE <DON@tifton.cpes.peachnet.edu> Subject: Animation I have a question. I am working with a complex environmental simulation model called RZWQM and want to visualize the output from it using animation. RZWQM generates huge data files which are in tabular format and, while it has some nice plotting tools, I want to "see" the results in real time as they are generated. Thing is, I know how the system being modeled (pesticide behavior in soil/plant system) ought to work; an animated output would quickly tell me if the model appears to be working. It would also make a hell of a demo of the model, which I need this fall for a meeting. I am not much of a programmer. Are there some packages out there which provide such a capability? I know how to create the graphs--it's the automated generation of sequential graphs and the development of an animation sequence that I need. I would be really grateful for any help on this. I have asked some of the gurus at Ft. about it--but additional opinions would be good... Don Wauchope
Date: Tue, 14 May 1996 10:36:56 -0500 From: Frits van Evert <fvevert@Soils.Umn.EDU> Subject: RE: Animation ------ =_NextPart_000_01BB4181.477A3AC0 Don, I have a biased answer for you. A visual development environment is of = course very helpful as soon as you put anything on the screen - I use = Delphi. In addition, I use a very nice shareware package of graph = components called TeeChart (but there are others). You can compile RZWQM = into a Windows DLL and call it from a Delphi application that does the = graphing. Incidentally, this is more or less what I am in the process of doing. If you want to try this route, I can give you more information. Regards, Frits van Evert University of Minnesota Dept. of Soil, Water and Climate St. Paul, MN ---------- From: DON WAUCHOPE[SMTP:DON@tifton.cpes.peachnet.edu] Sent: Tuesday, May 14, 1996 10:01 AM To: Multiple recipients of list Subject: Animation I have a question. I am working with a complex environmental simulation model called RZWQM and want to visualize the output from it using animation. RZWQM generates huge data files which are in tabular format and, while it has some nice plotting tools, I want to = "see" the results in real time as they are generated. Thing is, I know how = the system being modeled (pesticide behavior in soil/plant system) ought to work; an animated output would quickly tell me if the model appears to = be working. It would also make a hell of a demo of the model, which I need this fall for a meeting. I am not much of a programmer. Are there some packages out there which provide such a capability? I know how to create the graphs--it's the automated generation of sequential graphs and the development of an = animation sequence that I need. I would be really grateful for any help on this. I have asked some of = the gurus at Ft. about it--but additional opinions would be good... Don Wauchope ------ =_NextPart_000_01BB4181.477A3AC0 eJ8+IjsPAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAA5AQAAAAAAADoAAENgAQAAgAAAAIAAgABBJAG ABQBAAABAAAADAAAAAMAADADAAAACwAPDgAAAAACAf8PAQAAAEMAAAAAAAAAgSsfpL6jEBmdbgDd AQ9UAgAAAABhZ21vZGVscy1sQHVubC5lZHUAU01UUABhZ21vZGVscy1sQHVubC5lZHUAAB4AAjAB AAAABQAAAFNNVFAAAAAAHgADMAEAAAATAAAAYWdtb2RlbHMtbEB1bmwuZWR1AAADABUMAQAAAAMA /g8GAAAAHgABMAEAAAAVAAAAJ2FnbW9kZWxzLWxAdW5sLmVkdScAAAAAAgELMAEAAAAYAAAAU01U UDpBR01PREVMUy1MQFVOTC5FRFUAAwAAOQAAAAALAEA6AQAAAAIB9g8BAAAABAAAAAAAAANfMAEI gAcAGAAAAElQTS5NaWNyb3NvZnQgTWFpbC5Ob3RlADEIAQSAAQAOAAAAUkU6IEFuaW1hdGlvbgCR BAEFgAMADgAAAMwHBQAOAAoAJAA4AAIATgEBIIADAA4AAADMBwUADgAKAB4AJAACADQBAQmAAQAh AAAANkJFMENCRTM3MkFEQ0YxMUI4NjEwMDIwQUZEMEIyMzIAOgcBA5AGAHAHAAASAAAACwAjAAAA AAADACYAAAAAAAsAKQAAAAAAAwA2AAAAAABAADkA4A7FLqtBuwEeAHAAAQAAAA4AAABSRTogQW5p bWF0aW9uAAAAAgFxAAEAAAAWAAAAAbtBqy6948vgbK1yEc+4YQAgr9CyMgAAHgAeDAEAAAAFAAAA U01UUAAAAAAeAB8MAQAAABYAAABmdmV2ZXJ0QHNvaWxzLnVtbi5lZHUAAAADAAYQtRkjfwMABxBy BQAAHgAIEAEAAABlAAAARE9OLElIQVZFQUJJQVNFREFOU1dFUkZPUllPVUFWSVNVQUxERVZFTE9Q TUVOVEVOVklST05NRU5USVNPRkNPVVJTRVZFUllIRUxQRlVMQVNTT09OQVNZT1VQVVRBTllUSElO RwAAAAACAQkQAQAAAPoFAAD2BQAAQQoAAExaRnVDUXA4/wAKAQ8CFQKoBesCgwBQAvIJAgBjaArA c2V0MjcGAAbDAoMyA8UCAHByQnER4nN0ZW0CgzO3AuQHEwKDNBLMFMV9CoCLCM8J2TsXnzI1NQKA BwqBDbELYG5nMTAzLxRQCwoVYgwBYwBAIERNAiAsCoUKhUkgEYB2YGUgYSBiBzARsGRrHgAAgHcE kCACEAXAeaUIYC4UsCB2BAB1B0BuIA2wHeAXMHAHgAIwIDcJ8B/AA2BuIKMEACBvfGYgBaAIcBGw H7AEkHljHbAgYHBmdQMgHlAgHHNvAiAjQh9RIHB1owVAAHB5dGgLgGch0J8DoCSwHfAE8QnhIC0d kbp1IlFEIuEkwB+ASSOx4GRkaXRpHJEmBR4Q+yKDAwBjJWERgQfQKQEkMHEA0GthZx3wIeEJwGFz JqAiAW1wAiAgsQQgY9UHQGwecVQJ4EMRgQVAvChiJFElQSlRKUJvLJL0cykfgFkkEStAA6AqkoMD EB3wUlpXUU0hoBUCMG8eAVcLgGRvd/EEIERMTB6RHoArQiGg3wVAA1IeASZ0HgBwC1AooN5hJ2Il MTJQICBvB5ElQosqMyTRLhzNbmNpDbD7AjArUXknoCSxBCAhsQRgby0CBcArcAQRdzLCHaBh7zFA C4AlMxNQbyiwBBEh4f8vwDPvHZAh8CQCKTAgwS9B3nQioTXjA2AkUGUnoi4C/GdpHeEkAjZjC4Af EQDAoydiNB1SZWcLEXMcvVZGBRArEXYDkUUigXTdHMxVAwAigQCQdCKwIeH+TQuAKuAjgAGQCoUm cAUwqx+AIeFTOQBsJ6BXMlBbHuEwUkMyID2xZQqFU5lEQVBhIyAnoE1OHMwjCvQyIDE4MALRaS14 MTQ0DfAM0EkjC1kxrjYKoANgE9BjBUAtS0e/CodJ+wwwSsZAYANwOkxOJ0rGDIIccE9OL4BBVQBD SE9QRVtTTehUUDpQAUAnYAGAPfG0Y3AHkC5R4ADQaCrg80RACYB1XUvvTP0GYAIwi04vTztUClBz ZGE1sRpNV2AgSSAnoDE5OSI2V9AwOjAcYEFNs1L/TP1Ub1U/TztNIyD/J2ALUB3wF6A1IC5wKvMh 4Y8yIBPAWP9UDnViaksBe1sfTztBAwA9tEdPSFMzvjZJxxRRC/JKxh2ncVch1T3TIDd0dwWwayTS A/DvJLAeASqSK3B4IOoHQAqF/QCQbSMgMlQEYgMgK0UuxOcwUjqmH8Rpeh3wJUI7wf8kQjETJ1AK hSYwJNIAcGMVf2eRLsQp0CrgKkAT0AQgaP51KdFXUAGQHwAugTcSKKD/aME9MwqFAZFq8R7zPbEw Qv8noHKxLpEw4RGAI2IHgCiE/wtQLTAnYCThL0AG8D9gHZHlOqYiEbBlInN2JVEXoP8f4F0QNhED oBegIAEnYHYRXyNRJUEisClCcRZkZ5FU5yTDBAAnomtuL9AdsHzh7yVBalYTsx4gZSTSa3Mecf4o UeEnYDUiflEdwSdwBcB3N9EjgAMQLwtRIMF99Cm5bjFnaDrSCoVoEjsekf9v5R5xbkVoECMgHoBn ECig/ms1oCUwIGADIHYRBpAlM/9rdDHxUjARoDrifmCCaTkSn2ehhEYHQCOANlBhax3y/yLRAyAh 4R4QDbAEYCHShfd/dQNy4R2gKuAJgHiHIbFm/zCiHxIeEAeAEcA5Hzd0fNC/BUBq4HLhihM4QSox bQeA/nJnkQcQbeMpUXXzKYUhwf8sZ3KzCoU4QR/Af8Ef4HLi3ysxCrAeMDIgQrA/Z6J8yG8vUCWR RREzSHNLQCdQJ/8zMwqFRtAvQIOUcRUyciHh/xGwZxECMAcxl0UwQyVCIDr/ihKDRmNYmkQosTKz i/SOP/+EZH5gedOFESoxE9AjEo1jvySQIsMlBAQAZ5MdxHOJcO8egHXzirQKhWcIcCYwHgD/TcFE QQGgkqInUEtALFInJr8gASCAC4AncTcRoGZnI5D/e8CpABzMqg+rHhyBRPGPwX8ggEYGY49kn2Ws CoUWwQABsQAAAAMAEBAAAAAAAwAREAAAAABAAAcwgDiETKpBuwFAAAgwgDiETKpBuwEeAD0AAQAA AAUAAABSRTogAAAAACNX ------ =_NextPart_000_01BB4181.477A3AC0--
Date: Tue, 14 May 96 13:07 EDT From: "Rabi H. Mohtar" <RHM8@PSUVM.PSU.EDU> Subject: Re: Animation Dear Don: TECPLOT by AMETEC eng. does that. I have no address for them but you may try t he your computer center or the book store. I have seen a good demonstartion at a conference last month using this package. P.S. they should have a web page. Best luck Rabi ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Rabi H. Mohtar internet:rhm8@psuvm.psu.edu The Pennsylvania State University phone: (814) 865-2971 208 Agricultural Engineering Building fax: (814) 863-1031 University Park, PA 16802 "change begins with me"
Date: Tue, 14 May 1996 14:48:25 -0400 From: Jracht3@aol.com Subject: Re: Free Book I am an agricultural education instructor at Arvin High School in the San Joaquin Valley, CALIFORNIA- It would thrill my students to no end to know that their instructor received a copy of your research just by visiting with you over the NET. Our address is 900 Varsity,Arvin, CA 93203 (805)854 5829 Thank you very much!! Sincerely- J. Rachel Thoene McCraw Agriculture Instructor
Date: Tue, 14 May 1996 13:53:08 -0500 From: alogden@sun1.ortho.lsumc.edu (Al Ogden) Subject: Re: Free Book unsubscribe
Date: Tue, 14 May 1996 14:23:00 -0600 From: Daniel Fuka <dan@quetzalcoatl.com> Subject: Re: Free Book Hi there, I have just judged the regional science fair which had a kid studying arsenic in the Albuqueque groundwater. If you could send me a copy, I would forward it to her for use in next years project. It was quite an amazing project, which I would like to support in any way that I can. She took first place in the Jr. division. My address is Daniel Fuka Quetzal Computational Associates, Inc. PO Box 8057 Durango, CO 81301 Thanks, Daniel Fuka
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>From root@crcnis1.unl.edu Wed May 15 17:52 EDT 1996
Date: Wed, 15 May 1996 16:39:58 -0500
Message-Id: <199605152139.AA14721@crcnis1.unl.edu>
Subject: AGMODELS-L digest 498

Contents:
 Use of Delphi to visualize a model (bjohnson@cdprsmtp.cdpr.ca.gov)
Agricultural systems models comparison (bechini@imiucca.csi.unimi.it (Luca Bechini, PhD student))
Agricultural systems models comparison (bechini@imiucca.csi.unimi.it (Luca Bechini, PhD student))
Re: Use of Delphi to visualize a model (Derek Morgan <dm00hp@csl.gov.uk>)



Date: Wed, 15 May 1996 08:20:59 -0700 From: bjohnson@cdprsmtp.cdpr.ca.gov Subject: Use of Delphi to visualize a model I am very interested in hearing more about use of Delphi for visualizing model output, as mentioned by Frits van Evert.
Date: Wed, 15 May 1996 18:03:54 +0100 From: bechini@imiucca.csi.unimi.it (Luca Bechini, PhD student) Subject: Agricultural systems models comparison Hello Jo, dr. Donatelli gave me your adress to ask you this information. I am a PhD student in the Institute of Agronomy, Milano University, Italy. The aim of my PhD thesis is the assessment of nitrate groundwater potential pollution by animal wastes utilization at a watershed level. The work will be carried out using a GIS and a linked model. I am currently involved in evaluation and choice of the model for my work. Can you indicate me some references about agricultural models comparison? I'm interested to know which models best fit experimental data in different climatic and pedological conditions and the needed inputs for each model. Thank you very much for your attention, Luca ---------------------------------------- Luca Bechini, PhD student Institute of Agronomy Via Celoria, 2 Faculty of Agriculture 20133 MILANO University of Milan ITALY tel + 39 - 2 - 70.600.164 fax + 39 - 2 - 70.633.243 e-mail: bechini@imiucca.csi.unimi.it ----------------------------------------
Date: Wed, 15 May 1996 18:03:50 +0100 From: bechini@imiucca.csi.unimi.it (Luca Bechini, PhD student) Subject: Agricultural systems models comparison I am a PhD student in the Institute of Agronomy, Milano University, Italy. The aim of my PhD thesis is the assessment of nitrate groundwater potential pollution by animal wastes utilization at a watershed level. The work will be carried out using a GIS and a linked model. I am currently involved in evaluation and choice of the model for my work. Does anybody can indicate me some references about agricultural models comparison? I'm interested to know which models best fit experimental data in different climatic and pedological conditions and the needed inputs for each model. Thank you very much, Luca ---------------------------------------- Luca Bechini, PhD student Institute of Agronomy Via Celoria, 2 Faculty of Agriculture 20133 MILANO University of Milan ITALY tel + 39 - 2 - 70.600.164 fax + 39 - 2 - 70.633.243 e-mail: bechini@imiucca.csi.unimi.it ----------------------------------------
Date: Wed, 15 May 1996 18:21:31 +0100 From: Derek Morgan <dm00hp@csl.gov.uk> Subject: Re: Use of Delphi to visualize a model Dear all I too am interested in the Delphi-visualisation discussion (and others are to, I'm sure). Could you, therefore, post replies to the discussion group as well as (instead of ?) individuals. Many thanks. 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 Thu May 16 17:51 EDT 1996
Date: Thu, 16 May 1996 16:39:11 -0500
Message-Id: <199605162139.AA13232@crcnis1.unl.edu>
Subject: AGMODELS-L digest 499

Contents:
Re: Agricultural systems models comparison ("Sharyl Walker" <sew7924@sugar.age.uiuc.edu>)
Use of Delphi to visualize a model (Frits van Evert <fvevert@Soils.Umn.EDU>)



Date: Wed, 15 May 1996 17:21:58 CST From: "Sharyl Walker" <sew7924@sugar.age.uiuc.edu> Subject: Re: Agricultural systems models comparison Luca: I've just been reading a paper that might be of interest to you (and possibly to others on the list): Sham, C. H., J. W. Brawley, and M. A. Moritz. 1996. Analyzing septic nitrogen loading to receiving waters: Waquoit Bay, Massachusetts. In: GIS and Environmental Modeling: Progress and Research Issues, eds. M. F. Goodchild (and several others). GIS World Books: Fort Collins, CO, USA. pp. 261-264. The authors used MODFLOW (3-D ground water flow model), ARC/INFO (GIS), and their own nitorogen loading model to analyze the movement of nitrogen from residential septic systems into Waquoit Bay. The address for the senior author is given as: Chi Ho Sham The Cadmus Croup, Inc. 135 Beaver St. Waltham, MA 02154 USA Phone: (617) 894-9830 FAX: (617) 894-7238 Hope this helps. I'd be interested to hear what other references you find. -- Sharyl Walker University of Illinois > I am a PhD student in the Institute of Agronomy, Milano University, Italy. > The aim of my PhD thesis is the assessment of nitrate groundwater potential > pollution by animal wastes utilization at a watershed level. The work will > be carried out using a GIS and a linked model. > > I am currently involved in evaluation and choice of the model for my work. > > Does anybody can indicate me some references about agricultural models > comparison? I'm interested to know which models best fit experimental data > in different climatic and pedological conditions and the needed inputs for > each model. > > Thank you very much, > > Luca > > ---------------------------------------- > Luca Bechini, PhD student > Sharyl E. Walker, P.E., Ph.D. Department of Agricultural Engineering, University of Illinois 332-Q, A.E.S.B., 1304 W. Pennsylvania Ave., Urbana, IL 61801 USA (217) 333-0945; sew7924@sugar.age.uiuc.edu ; FAX: (217) 244-0323
Date: Thu, 16 May 1996 13:49:28 -0500 From: Frits van Evert <fvevert@Soils.Umn.EDU> Subject: Use of Delphi to visualize a model Dear all: Delphi is a visual development environment marketed by Borland, Inc. It = is based on a new version of Turbo Pascal. Borland has a web page at = http://www.borland.com/. The shareware graphing component that I mentioned in my earlier message = is called TeeChart. It is available from the author's homepage at = http://ourworld.compuserve.com/homepages/berneda/. I have experimented only a little with compiling Fortran code into a = Win95 DLL and then calling its functions from a Delphi program, but it = worked flawlessly. I intend to make extensive use of this during the = next few months. Good luck, Frits van Evert ---------- From: Derek Morgan[SMTP:dm00hp@csl.gov.uk] Sent: Wednesday, May 15, 1996 1:21 PM To: Multiple recipients of list Subject: Re: Use of Delphi to visualize a model Dear all I too am interested in the Delphi-visualisation discussion (and=20 others are to, I'm sure). Could you, therefore, post replies to the discussion group as well as (instead of ?) individuals. Many thanks. 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 May 17 17:57 EDT 1996
Date: Fri, 17 May 1996 16:42:06 -0500
Message-Id: <199605172142.AA25067@crcnis1.unl.edu>
Subject: AGMODELS-L digest 500

Contents:
Re: Agricultural systems models comparison (bechini@imiucca.csi.unimi.it (Luca Bechini, PhD student))



Date: Fri, 17 May 1996 16:54:19 +0100 From: bechini@imiucca.csi.unimi.it (Luca Bechini, PhD student) Subject: Re: Agricultural systems models comparison >Luca: > > I've just been reading a paper that might be of interest to you (and >possibly to others on the list): > > Hope this helps. I'd be interested to hear what other references >you find. Thank you very much for your help. Next week I will post to the list all the references I get. Bye Luca =================================================================== Luca Bechini, PhD student Institute of Agronomy Faculty of Agriculture tel + 39 - 2 - 70.600.164 University of Milan fax + 39 - 2 - 70.633.243 Via Celoria, 2 e-mail: bechini@imiucca.csi.unimi.it 20133 MILANO ITALY ===================================================================
End of Digest
>From root@crcnis1.unl.edu Sat May 18 17:51 EDT 1996
Date: Sat, 18 May 1996 16:40:09 -0500
Message-Id: <199605182140.AA05682@crcnis1.unl.edu>
Subject: AGMODELS-L digest 501

Contents:
     Re: Use of Delphi to visualize a model ("Samuel O. Ogunbo" <C519117@MIZZOU1.missouri.edu>)



Date: Fri, 17 May 96 20:05:22 CDT From: "Samuel O. Ogunbo" <C519117@MIZZOU1.missouri.edu> Subject: Re: Use of Delphi to visualize a model Dear frits - Thank you for sharing the information on TeeChart. I have a Delphi 2 installed on my machine recently and thought it'll be a good idea to include the TeeChart so I visited the authors URL. I found that there is a $79 fee which should be paid by MC or visa to the author's address in Spain. Did you obtain your copy this way? and also, I am not a programmer but will appreciate some hints on using results from SOYGRO in Delphi as well as TeeChart. Thank you again. Samuel Ogunbo (University of Missouri - Columbia USA)
End of Digest
>From root@crcnis1.unl.edu Mon May 20 10:35 EDT 1996
Date: Mon, 20 May 1996 09:13:52 -0500
Message-Id: <199605201413.AA23717@crcnis1.unl.edu>
Subject: AGMODELS-L digest 502

Contents:
TeeChart and Delphi (Frits van Evert <fvevert@Soils.Umn.EDU>)



Date: Mon, 20 May 1996 08:54:42 -0500 From: Frits van Evert <fvevert@Soils.Umn.EDU> Subject: TeeChart and Delphi Samuel Ogunbo and others: I obtained the demo version of TeeChart from a shareware site somewhere = on the Web. I don't remember where, so I directed you to the author's = homepage. The (free) demo version works fine but it pops up a little box = saying "Unregistered version" whenever you create a graph. So we just = registered using a credit card. We received the full version promptly by = e-mail as a ZIP file. There are at least two ways to plot results from SOYGRO (or any other = model). You can of course write a Delphi program that reads the SOYGRO = output files and then makes the plots you want. More exciting is the = kind of animation that Don Wauchope's message referred to. For that, you = could write a function in SOYGRO that performs the calculations for a = single time-step, plus a number of functions that return information on = the state of the simulation. Compile those functions (which are in = Fortran) into a Windows DLL using Microsoft's Powerstation compiler or = Lahey's LF90. Then you can write a Delphi program that calls the Fortran = functions in your DLL to run the simulation and plot results in real = time on the screen. The advantage of doing it this way is that you can use the ease of a = visual development environment and the power of Delphi to develop your = graphics application, while maintaining your existing Fortran code. Best regards, Frits van Evert Dept. of Soil, Water and Climate University of Minnesota St. Paul, MN USA
End of Digest
>From root@crcnis1.unl.edu Tue May 21 10:26 EDT 1996
Date: Tue, 21 May 1996 09:14:21 -0500
Message-Id: <199605211414.AA17614@crcnis1.unl.edu>
Subject: AGMODELS-L digest 503

Contents:
Windows '95, Windows NT and DOS Models (John_P._Carbone@rohmhaas.com (John P. Carbone))



Date: Tue, 21 May 1996 09:05:23 -0400 From: John_P._Carbone@rohmhaas.com (John P. Carbone) Subject: Windows '95, Windows NT and DOS Models In response to Grant Upchurch's inquiry: Grant, I had one negative comment that the WEPP CD-ROM had trouble running in Windows '95 however Dennis Flanagan (flanagan@ecn.purdue.edu) says he can provide instructions in how to get this done. As far a s LEACHP, Dave Eckhardt (daeckhar@usgs.gov) of Cornell tells me that LEACHP will be compiled for operation in a Windows '95 environment. On another note I have recently been told that PRZM2 and EXAMS run beautifully in an NT environment. Hope this helps.
End of Digest
>From root@crcnis1.unl.edu Wed May 22 14:45 EDT 1996
Date: Wed, 22 May 1996 13:31:45 -0500
Message-Id: <199605221831.AA15761@crcnis1.unl.edu>
Subject: AGMODELS-L digest 504

Contents:
     Re: TeeChart and Delphi (DON WAUCHOPE <DON@tifton.cpes.peachnet.edu>)



Date: Wed, 22 May 96 14:10:53 EDT From: DON WAUCHOPE <DON@tifton.cpes.peachnet.edu> Subject: Re: TeeChart and Delphi To all who have replied on animation of model outputs: That's very useful information! Thanks. I have received several replies and am also waiting to here from some other folks. I will post what works for me when I have got it going...Don Wauchope On Mon, 20 May 1996 08:57:38 -0500 Frits van Evert said: >Samuel Ogunbo and others: > >I obtained the demo version of TeeChart from a shareware site somewhere = >on the Web. I don't remember where, so I directed you to the author's = >homepage. The (free) demo version works fine but it pops up a little box = >saying "Unregistered version" whenever you create a graph. So we just = >registered using a credit card. We received the full version promptly by = >e-mail as a ZIP file. > >There are at least two ways to plot results from SOYGRO (or any other = >model). You can of course write a Delphi program that reads the SOYGRO = >output files and then makes the plots you want. More exciting is the = >kind of animation that Don Wauchope's message referred to. For that, you = >could write a function in SOYGRO that performs the calculations for a = >single time-step, plus a number of functions that return information on = >the state of the simulation. Compile those functions (which are in = >Fortran) into a Windows DLL using Microsoft's Powerstation compiler or = >Lahey's LF90. Then you can write a Delphi program that calls the Fortran = >functions in your DLL to run the simulation and plot results in real = >time on the screen. > >The advantage of doing it this way is that you can use the ease of a = >visual development environment and the power of Delphi to develop your = >graphics application, while maintaining your existing Fortran code. > >Best regards, > >Frits van Evert > >Dept. of Soil, Water and Climate >University of Minnesota >St. Paul, MN >USA
End of Digest
>From root@crcnis1.unl.edu Thu May 23 14:44 EDT 1996
Date: Thu, 23 May 1996 13:32:41 -0500
Message-Id: <199605231832.AA08063@crcnis1.unl.edu>
Subject: AGMODELS-L digest 505

Contents:
Getting a Good Corn Model (jhaskett@asrr.arsusda.gov)
     Re: Getting a Good Corn Model ("Samuel O. Ogunbo" <C519117@MIZZOU1.missouri.edu>)



Date: Thu, 23 May 1996 11:54:04 -0400 (EDT) From: jhaskett@asrr.arsusda.gov Subject: Getting a Good Corn Model I am looking for a good corn/maize model. Good means, validated, at least somewhat mechanistic, and uses reasonably available data. Many people use CERES-Maize. Where can I get a copy with documentation? Are there other readily available maize models, if so where? Enquiring minds want to know. ******************************************************************* ******************************************************************* Jonathan Haskett jhaskett@asrr.arsusda.gov "The fault, dear Brutus, is not in our stars, But in ourselves..."
Date: Thu, 23 May 96 12:41:37 CDT From: "Samuel O. Ogunbo" <C519117@MIZZOU1.missouri.edu> Subject: Re: Getting a Good Corn Model IBSNATs DSSAT v3 Software contains a number of models which includes = CERES Maize, SOYGRO and others. It is one of the best compilation of = crop models that I've seen. We got one last year for about $360 = You can contact IBSNAT by E-mail at: ibsnat@uhunix.uhcc.hawaii.edu Their Phone number is 1 - 808 956-8858 Fax number is 808 956-3421 Good luck!
End of Digest
>From root@crcnis1.unl.edu Mon May 27 04:32 EDT 1996
Date: Mon, 27 May 1996 03:20:59 -0500
Message-Id: <199605270820.AA01557@crcnis1.unl.edu>
Subject: AGMODELS-L digest 506

Contents:
Tomato models (Fabio Micale <micale@sar.sardegna.it>)



Date: Mon, 27 May 1996 10:13:24 +0200 From: Fabio Micale <micale@sar.sardegna.it> Subject: Tomato models Hello Ag-modelers, in Sardinia island there are more than 4.000 Ha of tomato crop and is duty of our Service to support the farmers in all aspect of the tomato's biological cycle. For this reason we are looking for any kind of models concerning this crop (growing simulation, pest and disease, irrigation, etc.). I will appreciate very much any support or suggetion. Many tanks in advance. Fabio Micale \|/ (. .) -.o00--(_)--00o.--------------------------------------- Fabio Micale, Ph.D. |voice: +39-79-258600 | Servizio Agrometeorologico |fax: +39-79-262681 | Regionale per la Sardegna |http://www.sar.sardegna.it| V.le Porto Torres, 119 | | Sassari (Italy) - 07100 |micale@sar.sardegna.it | --------------------------------------oOO-(^)-OOo------ (. .) /|\
End of Digest
>From root@crcnis1.unl.edu Tue May 28 05:05 EDT 1996
Date: Tue, 28 May 1996 03:54:13 -0500
Message-Id: <199605280854.AA14359@crcnis1.unl.edu>
Subject: AGMODELS-L digest 507

Contents:
Estimating drought extent & severity ("David White" <dhw@elnino.nric.gov.au>)



Date: Tue, 28 May 1996 18:52:16 -0700 From: "David White" <dhw@elnino.nric.gov.au> Subject: Estimating drought extent & severity Ag-meteors and Ag-modellers I would appreciate advice from other countries on estimating the extent and severity of drought. By this I do not mean simply drought monitoring - following when vegetation is drying off, but determining whether a drought is a 1 in 20 year (or worse) event. Australia implemented its National Drought Policy in 1992, though part of the country has been enduring severe drought since 1991. Government is prepared to assist farmers only in the case of Drought Exceptional Circumstances (what the South Africans would call a Disaster Drought .. I travelled through South Africa last October looking at their schemes). In Australia we are encouraging farmers to be more self-reliant and to become better able to handle the highly variable climate that characterises much of our continent. This is also very important for protecting our natural resource base (soils and vegetation). It is only when a situation arises that we regard as being outside the scope of normal risk management that the Australian (national) Government intervenes. Essentially there are six criteria by which we determine the existence of Drought Exceptional Circumstances. These are meteorological, agronomic condition, environmental condition, water supply, scale of the event and net farm income. Emphasis is initially on establishing that the meteorological condition is satisfied - particularly through the use of percentile and cumulative anomaly analysis, although as you can imagine, how this is handled varies considerably between the temperate grasslands in the south-east and south-west, the arid interior, and the tropical rangelands of the north, and whether the predominant farming enterprise is cropping or grazing. For this reason there is considerable interest in how best to assess the effectiveness of the rainfall. We are doing quite a lot of work testing water balance and agronomic models (crop and pasture) in different parts of the country (in Queensland in the north-east they have an excellent operational system to predict total standing dry matter on the rangelands using their GRASP model - their WWW site is also well worth a visit (http://www.dpi.qld.gov.au/longpdk/)). The advantage of these agronomic models is that they allow us to evaluate a drought in its historical context - we need at least 70 years of daily climate data to drive our vegetation models in order to determine whether a 1 in 20 event has occurred. As you can imagine, there are some interesting biomathematical challenges in comparing 1-2 year intense droughts with say 4-5 years of very adverse seasons (with say failed autumn rains) as part of the process of ranking the severity of individual droughts and in determining when these 1 in 20 droughts do occur - particularly when the current drought is not yet over. Added to this are some significant climate shifts over much of the country since records began last century. Naturally we also do a lot of visits to affected areas in determining whether Drought Exceptional Circumstances exist - discussions with farmer groups, examination of field data, and farm surveys. We are also looking at different ways in which remote sensing can be used to help us identify exceptional droughts. It is hoped that a combination of spatial/temporal vegetation modelling and remote sensing will help overcome some of the debates about 'lines on maps'. For those who would like to read up more on our approach before adding to the discussion, you may start with an article on "Coping with exceptional droughts in Australia", that Dr Don Wilhite of the International Drought Information Center has kindly put on his web site at the University of Nebraska: http://enso.unl.edu/ndmc/austral.htm For those who just want to read up on some views of what the Internet can do for rural areas, you might like to try: Using the Internet to benefit rural Australia; http://www.nric.gov.au/nric/papers/intnet.html and Australian Agri-industry Online; http://www.nric.gov.au/apnrb/papers/aiasnet.html And for those that would like to have a look at our Bureau of Meteorology's new WWW site: http://www.bom.gov.au/ Look forward to hearing from you - and particularly from people in South America about which we have little information. David H White Senior Principal Research Scientist c/- Bureau of Resource Sciences | Phone 61 6 272 4741 P.O. Box E11 | Queen Victoria Terrace | Fax 61 6 272 4896 Canberra, ACT 2600 | dhw@elnino.nric.gov.au Australia | dhw@acslink.net.au
End of Digest
>From root@crcnis1.unl.edu Wed May 29 05:10 EDT 1996
Date: Wed, 29 May 1996 03:56:26 -0500
Message-Id: <199605290856.AA15519@crcnis1.unl.edu>
Subject: AGMODELS-L digest 508

Contents:
Model for wheat growth and yield. ("S.C. Billy Wu" <S.C.Wu@geo.hull.ac.uk>)
Re: Model for wheat growth and yield. (Marco Mariotti <marcom@pisa.ccr.it>)
Re: Tomato models (Richard Plant <replant@ucdavis.edu>)
Ag models on WWW. ("S.C. Billy Wu" <S.C.Wu@geo.hull.ac.uk>)
Re: Estimating drought extent & severity (William Powers <wjp@xdiv.lanl.gov>)
Re: Estimating drought extent & severity (Tom Hodges <thodges@tricity.wsu.edu>)
Re: Estimating drought extent & severity (Jim Meade <jnmeade@blue.weeg.uiowa.edu>)



Date: Tue, 28 May 1996 09:47:43 +0100 (BST) From: "S.C. Billy Wu" <S.C.Wu@geo.hull.ac.uk> Subject: Model for wheat growth and yield. Hi, I am looking for a growth model and a yield model for wheat. I wonder anyone out there can help me? I want to have a look with the data collected by Rothamsted, England since 1843. Since I am a geographer, I do need your help. Thanks. Regards, +-------------------------------------------------------------------------+ |PhD. Research interest: Fractals and Chaos of Waves and Mountains | |Billy S.C. Wu, Geog. Dept., Uni. Hull, Hull HU6 7RX, England, U.K. | |Tel: +44-1482-466065 Fax: +44-1482-466340 Email: s.c.wu@geo.hull.ac.uk | +-------------------------------------------------------------------------+
Date: Tue, 28 May 1996 16:39:50 +0200 From: Marco Mariotti <marcom@pisa.ccr.it> Subject: Re: Model for wheat growth and yield. At 04.00 28/05/96 -0500, you wrote: >Hi, > >I am looking for a growth model and a yield model for wheat. I wonder >anyone out there can help me? I want to have a look with the data >collected by Rothamsted, England since 1843.=20 > >Since I am a geographer, I do need your help. Thanks. > >Regards, >+-------------------------------------------------------------------------+ >|PhD. Research interest: Fractals and Chaos of Waves and Mountains | >|Billy S.C. Wu, Geog. Dept., Uni. Hull, Hull HU6 7RX, England, U.K. | >|Tel: +44-1482-466065 Fax: +44-1482-466340 Email: s.c.wu@geo.hull.ac.uk | >+-------------------------------------------------------------------------+ > Billy, I think that the pubblication: "Masoni A., Ercoli L., Massantini F., 1990. Relationship between number of days, growing degree days and photothermal units and growth in wheat (triticum aestivum L.) according to seeding time. Agricoltura Mediterranea, 120, 41-51." could help you. Briefly, with the photothermal units (PTU) calculated as: PTU=3DGDD*DL where GDD=3D((TmaxAir+TminAir)/2)-Tbase [with Tbase=3D0=B0C] and= DL=3Ddaylength the growth of a wheat plant to the increase of the PTU, independently by seeding time (i.e. the model is good both for autumn and spring sowing), can be estimated with the following exponential polynomial type equations: Itercept Linear Quadratic Cubic coefficient coefficient = coefficient Culms (dry matter mg/plant) -0.7131 1.0299E-3 -4.2247E-8 = 5.534E-13 Leaves (dry matter mg/plant) 1.143 8.8163E-4 -4.4914E-8 = 6.9009E-13 Spikes (dry matter mg/plant) -0.9311 5.8594E-4 -9.9495E-9 Leaf area (cm=B2/plant) -1.3513 8.7396E-4 -3.0682E-8 Spikes area (cm=B2/plant) -16.818 1.8536E-3 -4.1016E-8 I hope that this is useful to you Marco
Date: Tue, 28 May 1996 08:24:41 -0700 (PDT) From: Richard Plant <replant@ucdavis.edu> Subject: Re: Tomato models Jose Cavero, working with me as a postdoc, has just completed a reformulation of the EPIC model to simulate processing tomatoes. He has now returned to Spain, where you may contact him at the following address: Jose Cavero Campo Servicio de Investigacion Agroalimentaria Apdo. 727 50080 Zaragoza SPAIN phone 34-976-576311 fax 34-76-575501 Richard Plant At 03:06 AM 5/27/96 -0500, you wrote: >Hello Ag-modelers, > >in Sardinia island there are more than 4.000 Ha of tomato crop and is duty >of our Service to support the farmers in all aspect of the tomato's >biological cycle. For this reason we are looking for any kind of models >concerning this crop (growing simulation, pest and disease, irrigation, >etc.). I will appreciate very much any support or suggetion. Many tanks in >advance. > >Fabio Micale > > > \|/ > (. .) >-.o00--(_)--00o.--------------------------------------- >Fabio Micale, Ph.D. |voice: +39-79-258600 | >Servizio Agrometeorologico |fax: +39-79-262681 | >Regionale per la Sardegna |http://www.sar.sardegna.it| >V.le Porto Torres, 119 | | >Sassari (Italy) - 07100 |micale@sar.sardegna.it | >--------------------------------------oOO-(^)-OOo------ > (. .) > /|\ > > > --------------------------- Richard E. Plant Department of Agronomy and Range Science University of California Davis, CA 95616 (916) 752-1705 replant@ucdavis.edu
Date: Tue, 28 May 1996 19:01:59 +0100 (BST) From: "S.C. Billy Wu" <S.C.Wu@geo.hull.ac.uk> Subject: Ag models on WWW. Dear All, I threw the question about where to find ag models. Then I found some. They are WWW site at: http://yacorba.res.bbsrc.ac.uk/cgi-bin/somnet-models There are 10, including ANIMO, CANDY, DAISY, EPIC, etc. Some cost to use. Some are free of charge. Regards, +-------------------------------------------------------------------------+ |PhD. Research interest: Fractals and Chaos of Waves and Mountains | |Billy S.C. Wu, Geog. Dept., Uni. Hull, Hull HU6 7RX, England, U.K. | |Tel: +44-1482-466065 Fax: +44-1482-466340 Email: s.c.wu@geo.hull.ac.uk | +-------------------------------------------------------------------------+
Date: Tue, 28 May 1996 12:35:17 -0600 From: William Powers <wjp@xdiv.lanl.gov> Subject: Re: Estimating drought extent & severity I found David White's comments and activities most interesting. I examined a number of the sites that he mentions in his email and some sites that were linked to from those sites. In partiuclar, I was interested in the long range forecasts distributed by the High Plains Climate Center (http://hpccsun.unl.edu). My question regarding much of this information is to its value. In particular, how reliable is the long range weather and percipitation predictions. Are they sufficiently reliable to encourage a farmer to plant or not to plant winter wheat? Of what value are they for a farmer lacking any irrigation capability? Farming communities already possess a rather extensive network of communication and information, although much of it is rather informal and colloquial. When I talk to farmers about the uses of modern telecommunications or the value of satellite data, they generally just shrug their shoulders. I don't believe that much of new technology has been proven to be of value to the average farmer. In fact, I think the user of the new technologies (e.g., remote sensing and telecommunications) is not farmers, but planners and investors. If this is true, how can it be changed? I'd be interested in hearing the experiences of others. Thanks again to the very informative missive by David White. Australia, I have found, is ahead of the U.S. in much of this. bill powers Los Alamos, NM
Date: Tue, 28 May 1996 12:42:52 -0700 (PDT) From: Tom Hodges <thodges@tricity.wsu.edu> Subject: Re: Estimating drought extent & severity Farmers in the Yakima Valley and Mid-Columbia Basin are using the weather station nekwork here heavily, especially for information on nights when frost is expected. They call long distance to get the weather data on nights when frost protection measures may be needed. So thats one example of modern tech that is used by farmers. Tom Hodges On Tue, 28 May 1996, William Powers wrote: > I found David White's comments and activities most interesting. I examined > a number of the sites that he mentions in his email and some sites > that were linked to from those sites. In partiuclar, I was interested > in the long range forecasts distributed by the High Plains Climate > Center (http://hpccsun.unl.edu). > > My question regarding much of this information is to its value. > In particular, how reliable is the long range weather and percipitation > predictions. Are they sufficiently reliable to encourage a farmer to > plant or not to plant winter wheat? Of what value are they for a > farmer lacking any irrigation capability? Farming communities already > possess a rather extensive network of communication and information, > although much of it is rather informal and colloquial. When I talk to > farmers about the uses of modern telecommunications or the value of > satellite data, they generally just shrug their shoulders. I don't > believe that much of new technology has been proven to be of value > to the average farmer. In fact, I think the user of the new > technologies (e.g., remote sensing and telecommunications) is not farmers, > but planners and investors. If this is true, how can it be changed? > > I'd be interested in hearing the experiences of others. > > Thanks again to the very informative missive by David White. > Australia, I have found, is ahead of the U.S. in much of this. > > bill powers > Los Alamos, NM >
Date: Tue, 28 May 1996 17:12:10 -0500 (CDT) From: Jim Meade <jnmeade@blue.weeg.uiowa.edu> Subject: Re: Estimating drought extent & severity Bill, DTN and FarmDayta have about 100,000 subscribers, many of them farmers, who use the weather data. Personally, I have little faith in the long range forecasts, i.e., 30 & 90 day. The 6-10 moves markets and the 3-5 gets my attention for planning. Today and tommorrow are the ones that really get used in management decisions. I use a lot of email to talk to other farmers about conditions, and use this info in making marketing decisions. Jim - Farmer - Iowa City, IA, jnmeade@blue.weeg.uiowa.edu
End of Digest
>From root@crcnis1.unl.edu Thu May 30 05:19 EDT 1996
Date: Thu, 30 May 1996 04:07:28 -0500
Message-Id: <199605300907.AA17855@crcnis1.unl.edu>
Subject: AGMODELS-L digest 509

Contents:
Summary: Models comparison (bechini@imiucca.csi.unimi.it (Luca Bechini, PhD student))
AgroSector Modelling (Caprazli@aol.com)
Re: agmodels posting ("S.C. Billy Wu" <S.C.Wu@geo.hull.ac.uk>)
Re: Summary: Models comparison (Daniel Fuka <dan@quetzalcoatl.com>)
Sorry {:-)  Re: Summary: Models comparison (Daniel Fuka <dan@quetzalcoatl.com>)
Re: agmodels posting (Mario de Andrade Lira Junior <mliraj@PO-Box.McGill.CA>)
Re: Estimating drought extent & severity (Rodney Beard <R.Beard@mailbox.uq.oz.au>)
Re: Estimating drought extent & severity (wayneh@cocaine.ind.dpi.qld.gov.au (Wayne Hall))
Re: Estimating drought extent & severity (Rodney Beard <R.Beard@mailbox.uq.oz.au>)
AgroSector Modelling ("Gommes, Rene (SDRN)" <Rene.Gommes@fao.org>)
Re: AgroSector Modelling (Rodney Beard <R.Beard@mailbox.uq.oz.au>)
Re: agmodels posting ("S.C. Billy Wu" <S.C.Wu@geo.hull.ac.uk>)
Models for fast growing vegatables. ("S.C. Billy Wu" <S.C.Wu@geo.hull.ac.uk>)



Date: Wed, 29 May 1996 12:15:43 +0100 From: bechini@imiucca.csi.unimi.it (Luca Bechini, PhD student) Subject: Summary: Models comparison Dear netters, about two weeks ago I asked some references about agricultural systems models comparison. Here is a summary of the replies I've got on the subject: ======================================================= "References on Agricultural Systems Models Comparison": ======================================================= ------------------------------------------------------------------------ Paul K. M. van der Heijde. 1994. Identification and Compilation of Unsaturated/Vadose Zone Models. Colorado School of Mines, International Ground Water Modeling Center, Golden, CO. 80401. Contact igwmc@mines.edu ------------------------------------------------------------------------ Sham, C. H., J. W. Brawley, and M. A. Moritz. 1996. Analyzing septic nitrogen loading to receiving waters: Waquoit Bay, Massachusetts. In: GIS and Environmental Modeling: Progress and Research Issues, eds. M. F. Goodchild (and several others). GIS World Books: Fort Collins, CO, USA. pp. 261-264. The authors used MODFLOW (3-D ground water flow model), ARC/INFO (GIS), and their own nitrogen loading model to analyze the movement of nitrogen from residential septic systems into Waquoit Bay. The address for the senior author is given as: Chi Ho Sham The Cadmus Croup, Inc. 135 Beaver St. Waltham, MA 02154 USA Phone: (617) 894-9830 FAX: (617) 894-7238 ------------------------------------------------------------------------ Groot,JJR, de Willigen, P, and Verbene,ELJ, 1991. Nitrogen turnover in the soil-crop system, Fertilizer Research, Vol 27:1-383. ------------------------------------------------------------------------ VEMAP, in press. Vegetation/ecosystem modelling and analysis project (VEMAP): Assessing biogeography and biogeochemistry models in a regional study of terrestrial ecosystem responses to climate change and CO2 doubling. Glob.Biogeochem.Cycles (in press). ------------------------------------------------------------------------ Shao,Y., & Henderson-Sellers,A., (in press). Soil moisture simulation workshop review. Glob.Planet.Change (in press). It's a soil moisture model comparison (RICE/PILPS). ------------------------------------------------------------------------ Powlson,D.S., Smith,P., & Smith,J.U., 1996. Evaluation of soil organic matter models using existing long-term datasets. NATO ASI Series. Series I. Global Environmental Change. Vol 38: pp.429. It's a comparison of soil organic matter models. ------------------------------------------------------------------------ Smith, P., Powlson, D.S., Smith, J.U., Elliot, E.T., 1996. Evaluation and comparison of soil organic matter models using datasets from seven long- term experiments (To be submitted May 1996), Geoderma. ------------------------------------------------------------------------ Mc Voy CW, KC Kersebaum, B Diekkruger and D Sondgerath (eds.)., Validation of agro-ecosystem models. Ecological Modelling Vol. 81 (1-3) August 1995. Special Issue. ------------------------------------------------------------------------ Reiniger P., J. Hutson, H. Jansen, J. Kragt, H. Piehler, M. Swerts and H. Vereecken. Evaluation and testing of models describing nitrogen transport and transformation in soils: An European Project. Transactions of the 14 Int. Congress of Soil Science, Kyoto I:156-161. ------------------------------------------------------------------------ Final report of the European Project: Nitrate in Soils: Soil and Groundwater Research Report II. Nitrate in soils. Commission of the European Communities DGXII 4th Environmental Research Programme, and is published by the EC. ------------------------------------------------------------------------ CAMASE Newsletter (ask M.C. Plentinger, see below, for details) "CAMASE is A CONCERTED ACTION FOR THE DEVELOPMENT AND TESTING OF QUANTITATIVE METHODS FOR RESEARCH ON AGRICULTURAL SYSTEMS AND THE ENVIRONMENT. The objectives of CAMASE are to advance quantitative research on agricultural systems and their environment in the EU-countries, by improving systems research in participating institutes through exchange and standardization of concepts, approaches, knowledge, computer programs and data. With CAMASE_NEWS, we aim to improve communication among scientists working in agro-ecosystem modelling and interested in better access to appropriate models, data, and related tools, instruction materials. CAMASE-core groups and others can contribute spontaneously or will be invited to contribute. Responsibility for the opinions expressed rests with the authors. CAMASE_NEWS will appear four times per year. Please submit news items for CAMASE_NEWS and requests for new subscriptions to: F.W.T. Penning de Vries/M.C. Plentinger DLO Research Institute for Agrobiology and Soil Fertility (AB-DLO) P.O.Box 14 6700 AA WAGENINGEN The Netherlands Telephone: +31.317.475961 Telefax: +31.317.423110 Internet: camase@ab.dlo.nl After an e-mail request for subscription, you will receive a form to give your address, which is necessary for postal mailings. ------------------------------------------------------------------------ Many thanks to: ^^^^^^^^^^^^^^^ Sharyl Walker, <sew7924@sugar.age.uiuc.edu> JOSMITH, <jo.smith@bbsrc.ac.uk> Vanclooster Marnik, <Vanclooster@geru.ucl.ac.be> Daniel Fuka, <dan@quetzalcoatl.com> Felix Herzogh, <herzog@alok.ufz.de> M.C. Plentinger, AB-DLO, <M.C.PLENTINGER@ab.dlo.nl> ======================================================================= Luca Bechini, PhD student Institute of Agronomy, Faculty of Agriculture tel +39 - 2 - 70.600.164 University of Milano - Via Celoria, 2 fax +39 - 2 - 70.633.243 20133 Milano - Italy e-mail: bechini@imiucca.csi.unimi.it =======================================================================
Date: Wed, 29 May 1996 12:12:23 -0400 From: Caprazli@aol.com Subject: AgroSector Modelling Hallo model builders and users, as far as I can see is this mail-list concentrating more on production-technical related models like EPIC, CERES etc., which is quite interesting to follow the problems and solutions in this field. I am - as a Ph.D. Student in Bonn - working on an agricultural sector model for Turkey with consumption and poduction reactions in dependence of the occuring national and international market situations. Is there a separate mail-list dealing specially with agricultural sector or market models? Kind regards Kafkas Caprazli caprazli@aol.com
Date: Wed, 29 May 1996 19:01:02 +0100 (BST) From: "S.C. Billy Wu" <S.C.Wu@geo.hull.ac.uk> Subject: Re: agmodels posting On Tue, 28 May 1996, Mario de Andrade Lira Junior wrote: > Mr. Wu > Hello, > First thank you for your posting to the agmodels listserver, about the > WWW site with models. I do believe, however, that there is some mistake > in the address you furnished, since I tried several times to contact it > and Netscape kept saying that the URL was non-existent. > If possible, I would like one verification of the address. > Thank you very much, > Mario Lira Junior I went back to 'sent-message' folder and tested the WWW I gave. It was OK. Perhaps it was the distance that gave the problem. One way I deal with this kind of situation is to relaod it many times until it is connected or I am fed up with it! Here I copy the WWW for soil-organic model from the Netscape. Hope it works for you. http://yacorba.res.bbsrc.ac.uk/cgi-bin/somnet-models Regards, +-------------------------------------------------------------------------+ |PhD. Research interest: Fractals and Chaos of Waves and Mountains | |Billy S.C. Wu, Geog. Dept., Uni. Hull, Hull HU6 7RX, England, U.K. | |Tel: +44-1482-466065 Fax: +44-1482-466340 Email: s.c.wu@geo.hull.ac.uk | +-------------------------------------------------------------------------+
Date: Wed, 29 May 1996 14:20:48 -0600 From: Daniel Fuka <dan@quetzalcoatl.com> Subject: Re: Summary: Models comparison Hi there, I was still wondering if Marchello Donetelli was the Marchello that you had mentioned in your request, and if so, if you knew his email address. Thanks, dan
Date: Wed, 29 May 1996 14:58:27 -0600 From: Daniel Fuka <dan@quetzalcoatl.com> Subject: Sorry {:-) Re: Summary: Models comparison Sorry about the accidental post to the group.
Date: Wed, 29 May 1996 17:01:25 -0700 From: Mario de Andrade Lira Junior <mliraj@PO-Box.McGill.CA> Subject: Re: agmodels posting Today it worked all right. Thank you. Mario
Date: Thu, 30 May 1996 08:57:24 +1000 (GMT+1000) From: Rodney Beard <R.Beard@mailbox.uq.oz.au> Subject: Re: Estimating drought extent & severity On Tue, 28 May 1996, David White wrote: > > We are doing quite a lot of work testing water balance and agronomic models > (crop and pasture) in different parts of the country (in Queensland in the > north-east they have an excellent operational system to predict total standing > dry matter on the rangelands using their GRASP model - their WWW site is also > well worth a visit (http://www.dpi.qld.gov.au/longpdk/)). > > The advantage of these agronomic models is that they allow us to evaluate a > drought in its historical context - we need at least 70 years of daily climate > data to drive our vegetation models in order to determine whether a 1 in 20 > event has occurred. As you can imagine, there are some interesting > biomathematical challenges in comparing 1-2 year intense droughts with say 4-5 > years of very adverse seasons (with say failed autumn rains) as part of the > process of ranking the severity of individual droughts and in determining when > these 1 in 20 droughts do occur - particularly when the current drought is not > yet over. Added to this are some significant climate shifts over much of the > country since records began last century. It seems to me that models of the type described also have a disadavantage. Because uncertainty is incorporated into the model by generating a distribution from rainfall data, these models implicitly have to assume that the distribution of rainfall is stationary. The trend in range ecology and management has however been away from equilibrium to disequilibrium models and opportunistic management strategies. State and transition models using both homogenous and nonhomogenous Markov chains have been used as an alternative framework. Only the latter (nonhomogenous) Markov chains drop the stationarity assumption. These quickly become intractable if you wish to incorporate the intensity of droughts into the model. An alternative approach, the one I use in my own work, is to use continous time stochastic processes and differential equations for modelling herd and pasture dynamics. Droughts are viewed as random events, in fact as ``Poisson events''. This approach has the advantage that it generalizes both state and transition and vital attribute approaches to pasture modelling and allows one to combine ecological models with socioeconomic concepts in a relatively simple manner. This can only be done with ``systems'' models such as GRASP and other related models in an ad-hoc manner. Regarding the problem of comparing long but less intense droughts with short intense droughts, one possibility is to use the hazard rate of farm profits, which essentially gives you the probability of a farm surviving a given drought. This still begs the question of what constitutes a drought, so that hazard rates can be compared between droughts. Climate change can be viewed in two ways: 1) Climate compared with weather is a ``slow'' process. Thus climate change could be modelled via changes in parameter values (sensitivity analysis). 2) Climate change can be viewed as leading to nonstationary weather patterns (distributions). If the model is capable of incorporating nonstationarities then climate change can be incorporated almost automatically. I would be interested in any thoughts or comments. Regards, Rodney Beard ------------------------ Rodney Beard Department of Agriculture Univerity of Queensland St. Lucia 4072 Australia Tel: +61 7 33652174 Webpage: http://www.uq.edu.au/agecon/rbeard.html ------------------------
Date: Thu, 30 May 96 10:19:50 EST From: wayneh@cocaine.ind.dpi.qld.gov.au (Wayne Hall) Subject: Re: Estimating drought extent & severity Rodney Beard wrote... >It seems to me that models of the type described also have a >disadavantage. Because uncertainty is incorporated into the model by >generating a distribution from rainfall data, these models implicitly >have to assume that the distribution of rainfall is stationary. The trend >in range ecology and management has however been away from equilibrium to >disequilibrium models and opportunistic management strategies. State and >transition models using both homogenous and nonhomogenous Markov chains >have been used as an alternative framework. Only the latter .... You seem to have made the assumption that we are simulating rainfall for the purposes of modelling. In fact the sort of work we can do is to model pasture growth etc based on actual rainfall data. We have over 100 years of daily rainfall data, and a less complete record of other met data, and so we can model the impact of droughts based one these. There are no assumptions about the stationarity of the processes, or otherwise, this is what actually happened. One can of course question the ability of these models to translate met data into pasture growth and animal production, but this is a separate issue. There is also the question of using the past record to assess future risk, but quite frankly it seems unlikely to me that anything else would give a better idea of what is likely than what has happened previously. Certainly the climate models are not sufficiently advanced to do this. cheers Neil Flood and Wayne Hall QLD DPI ------------------------------------------------------------------------------- Wayne Hall e-mail: wayneh@cocaine.ind.dpi.qld.gov.au Climate Impact and Spatial Systems, QLD DPI, AUSTRALIA -------------------------------------------------------------------------------
Date: Thu, 30 May 1996 12:48:25 +1000 (GMT+1000) From: Rodney Beard <R.Beard@mailbox.uq.oz.au> Subject: Re: Estimating drought extent & severity On Wed, 29 May 1996, Wayne Hall wrote: > You seem to have made the assumption that we are simulating rainfall for the > purposes of modelling. In fact the sort of work we can do is to model > pasture growth etc based on actual rainfall data. No, I haven't made this assumption, I'm quite aware that actual rainfall data is being used. We have over 100 years of > daily rainfall data, and a less complete record of other met data, and so we > can model the impact of droughts based one these. There are no assumptions > about the stationarity of the processes, or otherwise, this is what actually > happened. One can of course question the ability of these models to > translate met data into pasture growth and animal production, but this is a > separate issue. The point I was trying to make is that you treat actual rainfall data as if it were a distribution. Because you use time series for rainfall you necessarily assume that any given rainfall event is drawn from the same distribution. This procedure is quite common. I have seen it used with a number of agricultural models and I think it is quite acceptable for moderate environments where equilibrium is a reasonable assumption. You could of course break your rainfall data into wet periods and dry periods and maybe moderate periods, thus assuming a number of distributions depending on your classification. This is the sort of approach that the state and transition people use when using nonhomogenous Markov chains, except they tend to use vegetation cover instead of rainfall. > There is also the question of using the past record to assess future risk, > but quite frankly it seems unlikely to me that anything else would give a > better idea of what is likely than what has happened previously. It is not just the question of using the past record to assess future risk. For example a common technique of risk assessment is to use stochastic efficiency criteria (e.g. first, second and higher order stoichastic dominance). These are based on empirical estimation of the distribution of a random variable. This is fine as long as the distribution is stationary, i.e. as long as the data are drawn from a single distribution. This is rarely checked by people doing risk analysis. I think that the approach using historical rainfall data does have some things to offer, but every approach has some adavantages and disadvantages. For example, the approach I use does not use historical rainfall data. So model validation can be problematic, although one could test predicted means and variances against observed to the extent that observed data is available. Regarding prediction of future events. Is this really the desired goal? I think a more modest but still worthy goal would be to determine management strategies and policies that work in the face of the unpredictable. Regards, Rodney Beard ------------------------ Rodney Beard Department of Agriculture Univerity of Queensland St. Lucia 4072 Australia Tel: +61 7 33652174 Webpage: http://www.uq.edu.au/agecon/rbeard.html ------------------------
Date: Thu, 30 May 1996 07:31:00 +0002 From: "Gommes, Rene (SDRN)" <Rene.Gommes@fao.org> Subject: AgroSector Modelling Kafkas Caprazli asks >Is there a separate mail-list dealing specially with agricultural sector or >market models? I hope not! You are on a very important subject: look at the current maize and wheat prices. This definitely not the result of production only. R. Gommes
Date: Thu, 30 May 1996 17:24:11 +1000 (GMT+1000) From: Rodney Beard <R.Beard@mailbox.uq.oz.au> Subject: Re: AgroSector Modelling On Wed, 29 May 1996 Caprazli@aol.com wrote: > Hallo model builders and users, > > as far as I can see is this mail-list concentrating more on > production-technical related models like EPIC, CERES etc., which is quite > interesting to follow the problems and solutions in this field. > > I am - as a Ph.D. Student in Bonn - working on an agricultural sector model > for Turkey with consumption and poduction reactions in dependence of the > occuring national and international market situations. > > Is there a separate mail-list dealing specially with agricultural sector or > market models? > > Kind regards > Kafkas Caprazli caprazli@aol.com > Try agric-econ@mailbase.ac.uk You could try the Economics or the Agriculture FAQ to get subscription details. there's also a new list on political economy in agriculture, but your interests should be served by agric-econ. Rodney Beard University of Queensland
Date: Thu, 30 May 1996 09:44:17 +0100 (BST) From: "S.C. Billy Wu" <S.C.Wu@geo.hull.ac.uk> Subject: Re: agmodels posting On Thu, 30 May 1996, Tian, Yong wrote: > >Here I copy the WWW for soil-organic model from the Netscape. Hope it > >works for you. > > >http://yacorba.res.bbsrc.ac.uk/cgi-bin/somnet-models > > >Regards, ... > Yes, I can not access the address suggested in that message too. > > Tian Well. It is beyond my understanding. I connected to it at the time I sent the last msg. BTW, I would like to know if anyone WITHIN UK has the same problem? Not offensive to British colleagues. Just trying to pin down the problematic region, since so far the NO answers are from CA and NL. Alternatively, try the above address again, up to '...ac.uk' and travel down to sublevels. Good luck again. Sorry about the confusion. It is a good site to see the 150 years of experiment, huge collection of data, soil-organic models, among others. Give it one more chance. Regards, +-------------------------------------------------------------------------+ |PhD. Research interest: Fractals and Chaos of Waves and Mountains | |Billy S.C. Wu, Geog. Dept., Uni. Hull, Hull HU6 7RX, England, U.K. | |Tel: +44-1482-466065 Fax: +44-1482-466340 Email: s.c.wu@geo.hull.ac.uk | +-------------------------------------------------------------------------+
Date: Thu, 30 May 1996 10:03:00 +0100 (BST) From: "S.C. Billy Wu" <S.C.Wu@geo.hull.ac.uk> Subject: Models for fast growing vegatables. Hi, It's Bill again. Glad to know Rothamsted site is working. However, my problem has not yet solved. The data in that station, 150 years, seem a bit short of my target, 2048 data points per varaible. I have to look for production data of relatively fast growing crop/vegetables, and the model related to it. It is a bit crazy since no one, not even the British, is likely to record 4 harvests per year for 512 years. However, I felt it's worth asking around. Alternatively, does any one know where to find growth models and measurements? The data I need is e.g., dry biomass at each stage of growth. Thank you again. +-------------------------------------------------------------------------+ |PhD. Research interest: Fractals and Chaos of Waves and Mountains | |Billy S.C. Wu, Geog. Dept., Uni. Hull, Hull HU6 7RX, England, U.K. | |Tel: +44-1482-466065 Fax: +44-1482-466340 Email: s.c.wu@geo.hull.ac.uk | +-------------------------------------------------------------------------+
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