AGMODELS-L: 199709XX
is the compilation of discussion during Sep 97
via AB4EL Web Digests @ SunSITE
Date: Wed, 03 Sep 1997 00:02:57 -0600
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Subject: AGMODELS-L Digest - 28 Aug 1997 to 2 Sep 1997
Date: Wed, 3 Sep 1997 00:02:57 -0600
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There is one message totalling 13 lines in this issue.
Topics of the day:
1. QUESTION
Date: Wed, 3 Sep 1997 01:45:20 +0300
From: Sakis Bandis (bandis@SER.FORTHNET.GR)
Subject: QUESTION
I want to know how DG6/EC calculate the cotton subsidy that gives to
European cotton-producers.
I want this module calculation with examples and tables.
Can you help me?
Date: Thu, 04 Sep 1997 00:03:33 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 2 Sep 1997 to 3 Sep 1997
Date: Thu, 4 Sep 1997 00:03:33 -0600
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Subject: AGMODELS-L Digest - 2 Sep 1997 to 3 Sep 1997
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There is one message totalling 13 lines in this issue.
Topics of the day:
1. (No subject given)
Date: Wed, 3 Sep 1997 21:29:40 +0300
From: Sakis Bandis (bandis@SER.FORTHNET.GR)
Subject: (No subject given)
I want to know how DG6/EC calculate the cotton subsidy that gives to
European cotton-producers.
I want this module calculation with examples and tables.
Cah you help me?
Date: Sat, 06 Sep 1997 00:03:08 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 3 Sep 1997 to 5 Sep 1997
Date: Sat, 6 Sep 1997 00:03:08 -0600
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Subject: AGMODELS-L Digest - 3 Sep 1997 to 5 Sep 1997
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There are 2 messages totalling 47 lines in this issue.
Topics of the day:
1. GIS in Agr., June 1-3,'98, ORL
2. (No subject given)
Date: Fri, 5 Sep 1997 14:27:20 -0400
From: "Robert M. Peart" (peartr@AGEN.UFL.EDU)
Subject: GIS in Agr., June 1-3,'98, ORL
AG MODELERS:
Here is brief info about the Conference on
"Geospatial Information in Agriculture and Forestry"
to be held JUNE 1-3, 1998, at Disney World, Orlando.
Deadline for Paper Abstracts is OCTOBER 10, 1997, to
Bob Rogers, FAX: 313-994-5123. He is with SigmaERIM,
Ann Arbor, MI, and Disney is the Co-Sponsor, and a large
committee representing USDA, Univ. of Minn., Univ. of Florida,
Am. Soc. of Agr. Eng., Pioneer Hybrid, and many other
organizations is at work. Papers on Precision Agriculture,
Decision Support Systems, Sustainable Management, Expert
Systems, Use of Simulation in these Topics, etc. are encouraged.
See the Web Site at:
http://www.erim.org
Thanks for listening. Bob Peart
Robert M. Peart, Halftime Grad. Research Prof.,
Agr. & Biol. Eng. Dept. Univ. of Florida, Gainesville, FL 32611
peartr@agen.ufl.edu 352-392-8866 FAX:352-392-4092
Date: Fri, 5 Sep 1997 23:20:27 +0300
From: Sakis Bandis (bandis@SER.FORTHNET.GR)
Subject: (No subject given)
I want to know how DG6/EC calculate the cotton subsidy.
I want this module calculation with examples and tables.
Cah you help me?
Yours faithfully,
Sakis Bandis
Merarhias 59
62125 Serres
Greece
Date: Sun, 07 Sep 1997 00:01:23 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 5 Sep 1997 to 6 Sep 1997
Date: Sun, 7 Sep 1997 00:01:23 -0600
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Subject: AGMODELS-L Digest - 5 Sep 1997 to 6 Sep 1997
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There is one message totalling 28 lines in this issue.
Topics of the day:
1. WORLD MARKET PRICE
Date: Sat, 6 Sep 1997 11:28:11 +0300
From: Sakis Bandis (bandis@SER.FORTHNET.GR)
Subject: WORLD MARKET PRICE
I want to know how the European Commission calculates the WORLD MARKET
PRICE for unginned cotton (with examples, tables etc).
Cah anyone help me ?
==================================
Sakis Bandis
Manager
"Fotolivos's Ginning Mills s.a."
Fotolivos - 66034 - Drama
Greece
TEL: +30 521 93798
FAX: +30 521 93796
--------------------------------------------------------------------
or
Sakis Badis
Merarhias 59
62125 - Serres
Greece
Date: Mon, 08 Sep 1997 00:02:52 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 6 Sep 1997 to 7 Sep 1997
Date: Mon, 8 Sep 1997 00:02:52 -0600
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Subject: AGMODELS-L Digest - 6 Sep 1997 to 7 Sep 1997
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There is one message totalling 8 lines in this issue.
Topics of the day:
1. (No subject given)
Date: Fri, 5 Sep 1997 20:26:40 -0700
From: Jeff K Moon (port-orchard-moons@JUNO.COM)
Subject: (No subject given)
Please remove us from this list
Date: Wed, 10 Sep 1997 00:01:36 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 7 Sep 1997 to 9 Sep 1997
Date: Wed, 10 Sep 1997 00:01:36 -0600
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From: Automatic digest processor (LISTSERV@CRCVMS.UNL.EDU)
Subject: AGMODELS-L Digest - 7 Sep 1997 to 9 Sep 1997
To: Recipients of AGMODELS-L digests (AGMODELS-L@CRCVMS.UNL.EDU)
There are 6 messages totalling 193 lines in this issue.
Topics of the day:
1. Length of coastlines (2)
2. pesticide properties database (3)
3. Wanted: Used LI-COR 6200
Date: Tue, 9 Sep 1997 08:25:00 +0002
From: "Gommes, Rene (SDRN)" (Rene.Gommes@FAO.ORG)
Subject: Length of coastlines
Hello everyone on agmodels-L !
I am trying to collect some material for a paper on seas level rise and
population... Does anyone on this list have an idea where I could find a
list or digital file giving the length of the coastline for all the
countries of the world? "scale" does not really matter here, provided it is
homogeneous for the whole set.
Thanks
R.
Date: Tue, 9 Sep 1997 14:34:12 +0300
From: Sakis Bandis (bandis@SER.FORTHNET.GR)
Subject: Re: Length of coastlines
I want to know how the European Commission calculates the WORLD MARKET
PRICE for unginned cotton (with examples, tables etc).
Cah anyone help me ?
==================================
Sakis Bandis
Manager
"Fotolivos's Ginning Mills s.a."
Fotolivos - 66034 - Drama
Greece
TEL: +30 521 93798
FAX: +30 521 93796
At 08:25 ð.ì. 09/09/1997 +0002, you wrote:
)Hello everyone on agmodels-L !
)
)I am trying to collect some material for a paper on seas level rise and
)population... Does anyone on this list have an idea where I could find a
)list or digital file giving the length of the coastline for all the
)countries of the world? "scale" does not really matter here, provided it is
)homogeneous for the whole set.
)
)Thanks
)
)R.
)
Date: Tue, 9 Sep 1997 13:16:08 +0100
From: Sweeney Paul PJJ (Paul.P.J.J.Sweeney@GBJHA.ZENECA.COM)
Subject: pesticide properties database
Hi all,
I am having difficulty getting into the Pesticide Properties
database web page. Does anybody know if there are any problems, or if the
site has changed address recently?
Paul
Date: Tue, 9 Sep 1997 09:48:56 -0500
From: Dennis Timlin (dtimlin@ASRR.ARSUSDA.GOV)
Subject: Re: pesticide properties database
--- On Tue, 09 Sep 1997 13:16:08 +0100 Sweeney Paul PJJ (Paul.P.J.J.Sweeney@GBJHA.ZENECA.COM) wrote:
) Hi all,
) I am having difficulty getting into the Pesticide Properties
) database web page. Does anybody know if there are any problems, or if the
) site has changed address recently?
)
) Paul
)
Unfortunately the server for the database web page went down. It may be a week or more before we get it working again. If anyone has any specific questions please e-mail me at dtimlin@asrr.arsusda.gov. I'll post a note when it is back up again. Sorry for the inconvenience.
-------------------------------------
Dennis Timlin
USDA-ARS Remote Sensing
and Modeling Lab
Bldg 007, Rm 008 BARC-W
10300 Baltimore Ave
Beltsville, MD 20705
301-504-6255
fax 301-504-5823
DTimlin@ASRR.ARSUSDA.GOV
Date: 09/09/97 Time: 09:48:56
-------------------------------------
Date: Tue, 9 Sep 1997 09:04:10 -0500
From: "Wei, Jun" (jwei@DOWELANCO.COM)
Subject: Re: pesticide properties database
Dennis,
Could you tell me if there is another mailing list specially for remote
sensing? How can I subscribe it? By the way, do you have more
information about the 28th Crop Simulation Workshop?
Thanks in advance,
Jun
_____________________________________________
Jun Wei Ph. D. Tel: (317) 337-3775
DowElanco Fax: (317) 337-3215
Building 306/D2 email: jwei@dowelanco.com
9330 Zionsville Rd. weij@phibred.com
Indianapolis, IN 46268
)----------
)From: Dennis Timlin[SMTP:dtimlin@ASRR.ARSUSDA.GOV]
)Sent: Tuesday, September 09, 1997 9:48 AM
)To: AGMODELS-L@crcvms.unl.edu
)Subject: Re: pesticide properties database
)
)--- On Tue, 09 Sep 1997 13:16:08 +0100 Sweeney Paul PJJ
)(Paul.P.J.J.Sweeney@GBJHA.ZENECA.COM) wrote:
)) Hi all,
)) I am having difficulty getting into the Pesticide Properties
)) database web page. Does anybody know if there are any problems, or if the
)) site has changed address recently?
))
)) Paul
))
)
)
)Unfortunately the server for the database web page went down. It may be a
)week or more before we get it working again. If anyone has any specific
)questions please e-mail me at dtimlin@asrr.arsusda.gov. I'll post a note when
)it is back up again. Sorry for the inconvenience.
)
)
)-------------------------------------
)Dennis Timlin
)USDA-ARS Remote Sensing
) and Modeling Lab
)Bldg 007, Rm 008 BARC-W
)10300 Baltimore Ave
)Beltsville, MD 20705
)301-504-6255
)fax 301-504-5823
)DTimlin@ASRR.ARSUSDA.GOV
)Date: 09/09/97 Time: 09:48:56
)-------------------------------------
)
Date: Tue, 9 Sep 1997 13:14:19 +0000
From: Nigel Pickering (nbpickering@COMMNECTIONS.COM)
Subject: Wanted: Used LI-COR 6200
Hello All
Does anyone have a used, good condition, LI-COR 6200 for sale?
Or where we might get one?
Alternatively, anyone willing to rent one to us for 6 one-week
periods over the next 2 years?
Nigel
--
Nigel Pickering, Ph.D.,P.E., Project Manager
Soil & Water Engineering Technology
3448 NW 12th Ave., Gainesville, FL 32694
352-378-7372 (V) / 352-378-7372 (F)
http://www.swet.com
Date: Thu, 11 Sep 1997 00:02:06 -0600
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Subject: AGMODELS-L Digest - 9 Sep 1997 to 10 Sep 1997
Date: Thu, 11 Sep 1997 00:02:06 -0600
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There is one message totalling 33 lines in this issue.
Topics of the day:
1. Artificial Intelligence in Agriculture
Date: Wed, 10 Sep 1997 09:59:11 +0200
From: Roger Martin-Clouaire (rmc@TOULOUSE.INRA.FR)
Subject: Artificial Intelligence in Agriculture
Dear Sirs,
We are planning to hold the 3rd triennial IFAC/CIGR Workshop entitled
"Artificial Intelligence in Agriculture". It will be held on 24 to 26
April 1998 in Makuhari, Japan (in Chiba prefecture, 25 km east from
Tokyo). The purpose of the workshop is to discuss AI and advanced
computer application in agriculture.
We may kindly ask for your contribution. Also we would ask your
cooperation in encouraging researchers around you to consider to
contribute to the workshop. The deadline for submission of extended
abstracts and draftpaper will be coming at 1 October 1997.
The submission of the abstract through the Internet is available.
The web page of the workshop is http://www.fb.u-tokai.ac.jp/IFAC/.
Thank you for your cooperation.
Faithfully yours,
Yasushi Hashimoto, Chairman (YasushiHASHIMOTO@agr.ehime-u.ac.jp)
Hirohiko Murase, Vice-chairman (hmurase@center.osakafu-u.ac.jp)
Takehiko Hoshi, Secretary (hoshi@fb.u-tokai.ac.jp)
Date: Sat, 13 Sep 1997 00:02:51 -0600
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Subject: AGMODELS-L Digest - 10 Sep 1997 to 12 Sep 1997
Date: Sat, 13 Sep 1997 00:02:51 -0600
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There is one message totalling 112 lines in this issue.
Topics of the day:
1. Position Announcement
Date: Fri, 12 Sep 1997 14:43:36 -0500
From: Tharacad Ramanarayanan (rama@BRCSUN0.TAMU.EDU)
Subject: Position Announcement
Dear Collegues:
The Attached information is for your information or
please pass it on to interested persons. Thanks.
Sorry for Cross Posting.
Ramanarayanan.
Attachment Converted: "c:\eudora32\Attach\RAPOST1.txt"
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
T.S. Ramanarayanan, Ph.D.
Blackland Research Center
808 East Blackland Road
Temple, Texas 76502.
Voice:(254) 770-6622; Fax: 770-6690;
mailto: t-ramanarayanan@tamu.edu
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~From ???@??? Sun Sep 21 12:04:36 1997
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Date: Sun, 21 Sep 1997 00:02:45 -0600
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There is one message totalling 124 lines in this issue.
Topics of the day:
1. [Fwd: Internet Conference 1998]
Date: Sat, 20 Sep 1997 13:43:02 -0400
From: Ricardo Braga (rbraga@AGEN.UFL.EDU)
Subject: [Fwd: Internet Conference 1998]
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Date: Sat, 20 Sep 1997 16:38:07 +0900
Reply-To: "Eng-Leong \"Jacky\" Foo" (foo@IAS.UNU.EDU)
Sender: Ecotechnology Announcements (ET-ANN@SEGATE.SUNET.SE)
From: "Eng-Leong \"Jacky\" Foo" (foo@IAS.UNU.EDU)
Subject: Internet Conference 1998
To: ET-ANN@SEGATE.SUNET.SE
CALL FOR ABSTRACTS AND PAPERS
Internet Conference on Integrated Bio-Systems (April-Dec 1998)
This Internet Conference is a virtual conference where full papers will be
available on the web and their discussions will be conducted via electronic
mailing lists.
The conference is jointly organized by the Institute of Advanced Studies
(UNU/IAS) of the United Nations University (Tokyo) and the UNESCO Microbial
Resources Center (MIRCEN-Stockholm) under the UNU/IAS prgramme on
"eco-restructuring for sustainable development" which advocates the zero
emissions concept of wastes and by-products utilization for
income-generating activities and those that contribute to a cleaner
environment.
The purpose of the conference is to permit Internet access to a
comprehensive documentation of past and current work on integrated
bio-systems, to enable authors to share knowledge and know-how and to
encourage participants to interact with the authors. The Internet confer
ence will gather biologists, scientists, engineers, sociologists,
economists and project coordinators and members of the electronic Network
on Integrated Bio-systems.
Scope
The conference will deal with a variety of topics on the science,
technology and practice of integrated bio-systems in agriculture,
aquaculture and industry for energy and primary food production, waste
treatment & utilization, food processing. Papers are invited on integrated
bio-systems for localized site applications, such as fish-bivalve
polyculture systems in aquaculture; crop-mushroom-compost systems in
agriculture; integrated agriculture-aquaculture systems (e.g. rice-fish
systems); systems for wastewater treatment and utilization, water quality
management (e.g. sewage wastewater-fish-hydroponics-wetland systems) and
solid waste treatment and utilisation (e.g. municipal solid
waste-vermiculture-compost-duck systems, and livestock
manure-biogas-crop/horticulture systems). Scientific papers related to the
above topics on their microbial ecosystems, their materials balance and
nutrients flows, transfer of toxics in the food chains, economic analysis
and assessment of whole systems, ecological bioremediation, etc. are also
welcomed. Other systems may have a wider landscape applications, including
coastal zone aquaculture and resource management, agro-forestry,
lowland-upland, urban-agriculture, lakes, villages, communities, industrial
and recreation parks, cities) and those at a regional level that cover
socio-economic and political issues.
Instructions for Submission of Abstracts:
An abstract should not be longer than 55 lines (65 characters per line) and
to include (a) title, author(s) name(s), postal address, and other
electronic addresses. Please send your abstract(s) to:
ias-wg09@ias.unu.edu
Deadline: 1st submission - 31 Dec'97 - for presentation between
April-June'98
Deadline: 2nd submission - 30 June'98 - for presentation between
Oct-Dec'98.
All abstracts will be reviewed by a committee and upon their approval,
authors will be requested to submit the full paper. Details will be
provided separately to authors. Abstracts and full papers will be available
on a web site and for discussion via an electronic mailing list. Access to
electronic mail or Internet is a pre-requisite.
To receive future details and announcements on the conference, please join
the list: ias-wg08@ias.unu.edu ; send an email to Listserv@ias.unu.edu and
write the message: SUB IAS-WG08 yourfirstname yourlastname
e.g. sub ias-wg08 Raman Chambers
Contact Person:
Eng-Leong "Jacky" Foo.
mailto: ias-wg09@ias.unu.edu
Date: Thu, 25 Sep 1997 00:02:46 -0600
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Date: Thu, 25 Sep 1997 00:02:46 -0600
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There are 2 messages totalling 142 lines in this issue.
Topics of the day:
1. model database (2)
Date: Wed, 24 Sep 1997 13:25:47 -0400
From: Ricardo Braga (rbraga@AGEN.UFL.EDU)
Subject: model database
Hi all,
Just to make sure everyone knows about this model database:
http://dino.wiz.uni-kassel.de/model_db/models.html
Regards,
Ricardo
Attachment Converted: "c:\eudora32\Attach\vcard3.vcf"
Date: Wed, 24 Sep 1997 19:47:30 -0400
From: Ricardo Braga (rbraga@AGEN.UFL.EDU)
Subject: Re: model database
Hi again,
I DO NOT deserve any credits for this database!!
I simply sent the url so everyone can use because I think it is very
usefull.
The database was developed by the University of Kassel, Germany.
Refer to the URL
http://dino.wiz.uni-kassel.de/ecobas.html
to register your models.
There is a similar effort in a project called CAMASE (don't know if still
alive)
from AB-DLO Wageningen, The Netherlands.(http://www.bib.wau.nl/camase/)
Regards,
Ricardo
David Buland wrote:
) Thanks for this database.
) It looks like a awful lot of work, but it is needed.
)
) Please add CARE, Cost and Return Estimator, to your site.
) This crop budget model is used with the EPIC/SWAP family of models to
) estimate the economic changes.
) It is also used in NRCS (old SCS) offices throughout the county.
)
) Also here are the updated sites for some Blackland Models.
)
) EPIC http://brcsun0.tamu.edu/epic/index.html
) SWAT http://brcsun0.tamu.edu/swat/swat/index.html
) CARE http://waterhome.tamu.edu/care/index.html
) HUMUS http://srph.tamu.edu:8000/humus/
)
) Thanks, again.,
)
) David Buland Economist
) Natural Resources Inventory and Analysis Institute
) USDA/NRCS, Blackland Research Station
) 808 East Blackland Road, Temple, TX 76502
) 254-770-6522, Fax: 254-770-6561, Home: 254-771-3341
) buland@brcsun0.tamu.edu, Home: buland@vvm.com
) VoiceCom: 1-800-384-USDA, Box 945-1290
)
) -----Original Message-----
) From: Ricardo Braga [SMTP:rbraga@AGEN.UFL.EDU]
) Sent: Wednesday, September 24, 1997 12:26 PM
) To: AGMODELS-L@CRCVMS.UNL.EDU
) Subject: model database
)
) Hi all,
) Just to make sure everyone knows about this model database:
)
) http://dino.wiz.uni-kassel.de/model_db/models.html
) Regards,
) Ricardo
Attachment Converted: "c:\eudora32\Attach\vcard4.vcf"
Date: Fri, 26 Sep 1997 00:02:36 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 24 Sep 1997 to 25 Sep 1997
Date: Fri, 26 Sep 1997 00:02:36 -0600
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There is one message totalling 53 lines in this issue.
Topics of the day:
1. The history of ag modeling. Where we are headed in the future...
Date: Thu, 25 Sep 1997 08:40:09 -0500
From: "Robert M. Caldwell" (serc018@UNLVM.UNL.EDU)
Subject: The history of ag modeling. Where we are headed in the future...
Dear AgModels-L list members,
I would like to kick-off two lines of discussion.
Thread 1: A time-line for key developments in modeling
For the sake of newcomers to ag modeling, I think it would be good to
review our history. Please submit to AgModels-L your personal opinions on
the most important events that have affected our progress. Key citations
would be nice, though I would also like to hear about accomplishments that
never made it into a publication. Quantification of changes (e.g., growth
in lines of code, number of variables, power of computers) would be nice to
go along with the description of key events.
To get things started, two items of interest to me would be:
-- When were the earliest crop simulation models developed?
Specifically, when was a model for leaf area growth first coupled with a
photosynthesis model?
-- When were the earliest "validations" of a crop simulation model done?
Who first put together an observed-versus-predicted comparison?
Thread 2: A projected time-line for what our future holds
Setting a research agenda in modeling is, or should be, closely tied to
the social needs and technological opportunities that will exist in the
future. Please pass along to AgModels-L citations for literature (including
the popular press) that make those kind of projections. For this thread, I
suggest we limit ourselves primarily to citations and not debate personal
hunches (though I would like to hear from anyone that has made a major
programmatic shift because of what they project will happen in the future).
Quantitative predictions are the best. If we survive, we should be able
to test them, right?
I would like to see references that try to answer:
-- What are the best estimates for the growth in computer power over the
coming decades?
-- What changes are we likely to see in agriculture's use of computers?
What types of user interfaces will we use? How will farmers use computers?
For these two threads, please make your submissions brief and focussed. As
a courtesy, you might start your subject line with "History:" or "Future:"
so that readers can quickly judge the contents.
Sincerely,
Bob Caldwell, Cropping Systems Specialist, Dept. of Agronomy/SEREC/NEREC
University of Nebraska - Lincoln
204 Mussehl Hall, P.O. Box 830714, Lincoln, NE 68583-0714
serc018@unlvm.unl.edu Phone: (402) 472-3674. FAX: (402) 472-3858.
Date: Sat, 27 Sep 1997 00:02:59 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 25 Sep 1997 to 26 Sep 1997
Date: Sat, 27 Sep 1997 00:02:59 -0600
Reply-To: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
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From: Automatic digest processor (LISTSERV@CRCVMS.UNL.EDU)
Subject: AGMODELS-L Digest - 25 Sep 1997 to 26 Sep 1997
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There are 2 messages totalling 64 lines in this issue.
Topics of the day:
1. Grow Chamber Model (2)
Date: Fri, 26 Sep 1997 12:24:26 +0000
From: drake@EROLS.COM
Subject: Grow Chamber Model
I am working on a grow chamber for carnivorous plants. The goal is to
provide optimum light intensity and spectrum, enough CO2 whether by
ventilation or a yeast-sugar-water mixture to make CO2 or any other
means, a high humidity, and a warm but consistent temperature around
80 degrees fahrenheit (+- a few degrees).
I have not decided on a particular light source yet, though I am
seriously considering Metal Halide lights or High Pressure Sodium with
the optional Agricultural spectrum feature (slightly more expensive).
The walls of the grow chamber will most likely be made of glass, and
lined on the inside with mylar to reflect light back towards the
plants. Depending on the shape of the grow chamber, one or all of the
walls will be removable or slide up to allow access to the plants.
Now to the conflict when constructing this model:
The goal of greatly accelerated plant growth is hindered by limiting
factors. The greatest of these limiting factors is light.
My question is about the geometric shape of the grow chamber. Which
geometric shape would provide *maximum* reflection of the light by the
mylar? I suppose this would involve angles of reflection, etc. For
instance, a hexagonal shape in 3 dimensions would reflect light off of
8 surfaces at certain angles, while an octagon in 3 dimensions would
reflect light off of 10 surfaces at even more angles. The question
becomes more complex with a spherical shape (with angled panels to
comprise the overall spherical shape) where light would be reflected
not only off the sides, top, and bottom, but from the diagonal panels
that connect the sides to the top and bottom.
Again, my question is: Which geometric shape provides maximum
light reflection in the grow chamber in this scenario?
Any help would be GREATLY appreciated. :)
Date: Fri, 26 Sep 1997 17:52:14 -0500
From: Ranjan Muttiah (muttiah@BRCSUN0.TAMU.EDU)
Subject: Re: Grow Chamber Model
It seems that that due to the way you will construct the chamber,
you will not have a perfect sphere. Therefore, consider building
using concave shaped mylars shields/mirrors. You can use an equation
relating the angle subtended by an arc at the center of the sphere
to decide how to construct the mirrors: the larger the angle
the more the image will be formed closer to the vertex. You can
also use a "stop" to control spherical aberration. Without the
refractive indices etc. it is hard to say more...
Ranjan
Date: Sun, 28 Sep 1997 00:02:35 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 26 Sep 1997 to 27 Sep 1997
Date: Sun, 28 Sep 1997 00:02:35 -0600
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From: Automatic digest processor (LISTSERV@CRCVMS.UNL.EDU)
Subject: AGMODELS-L Digest - 26 Sep 1997 to 27 Sep 1997
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There is one message totalling 42 lines in this issue.
Topics of the day:
1. Grow Chamber Model
Date: Sat, 27 Sep 1997 16:24:15 +0000
From: Oscar Monje (oscar@MENDEL.USU.EDU)
Subject: Re: Grow Chamber Model
drake.
It seems that having a hexagon (or other geometry..) will cause a
great deal of sidelighting to fall on you plants.
This would complicate the inputs of any light interception model you
try to use to simulate conditions on your chamber (but maybe youre
not going to do this?). As far as using mylar, you should be aware
that it will degrade with time and become brittle. We use sheets of
Coilzac, a thin, highly reflective metal sheet that is put inside EGC
growth chambers. We built a box around our plants that gives us a
known, fixed area and this helps us express light interception on an
area basis.
As far as the co2 enrichment system goes, you may consider having a
blower with a rotameter and a tank of pure co2 (depending on your
air flow). This could be upgraded to a mass flow controller and a
PID based control system. You may have to blow the co2 through
potassium permanganate (Air Repair) to remove ethylene contaminants
from the tank gas.
The only major difference between the MH and HPS is that MH lamps
provide blue light and HPS doesn't, which may affect stem elongation
etc. Otherwise both provide sufficient PPF, we get close to 2000 umol
m-2 s-1 over an area of 1 m2 with only 4 HPS lamps. We also use a
recirculating water bath under the lamps to remove a great of heat
(nonphotosynthetic longwave radiation) which helps the leaf
temperatures to remain well below air temp (1-2 degrees).
I hope this helps.
OM
OM
oscar@mendel.usu.edu
http//www.usu.edu/~cpl/index.html
Date: Mon, 29 Sep 1997 00:02:31 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 27 Sep 1997 to 28 Sep 1997
Date: Mon, 29 Sep 1997 00:02:31 -0600
Reply-To: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
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From: Automatic digest processor (LISTSERV@CRCVMS.UNL.EDU)
Subject: AGMODELS-L Digest - 27 Sep 1997 to 28 Sep 1997
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There is one message totalling 40 lines in this issue.
Topics of the day:
1. Crop Model
Date: Sun, 28 Sep 1997 17:59:23 +0000
From: Oscar Monje (oscar@MENDEL.USU.EDU)
Subject: Re: Crop Model
drake.
It seems that having a hexagon (or other geometry..) will cause a
great deal of sidelighting to fall on you plants.
This would complicate the inputs of any light interception model you
try to use to simulate conditions on your chamber (but maybe youre not
going to do this?). As far as using mylar, you should be aware that it
will degrade with time and become brittle. We use sheets of Coilzac, a
thin, highly reflective metal sheet that is put inside EGC growth
chambers. We built a box around our plants that gives us a known,
fixed area and this helps us express light interception on an area
basis.
As far as the co2 enrichment system goes, you may consider having a
blower with a rotameter and a tank of pure co2 (depending on your air
flow). This could be upgraded to a mass flow controller and a PID
based control system. You may have to blow the co2 through potassium
permanganate (Air Repair) to remove ethylene contaminants from the
tank gas.
The only major difference between the MH and HPS is that MH lamps
provide blue light and HPS doesn't, which may affect stem elongation
etc. Otherwise both provide sufficient PPF, we get close to 2000 umol
m-2 s-1 over an area of 1 m2 with only 4 HPS lamps. We also use a
recirculating water bath under the lamps to remove a great of heat
(nonphotosynthetic longwave radiation) which helps the leaf
temperatures to remain well below air temp (1-2 degrees).
I hope this helps.
OM
oscar@mendel.usu.edu
http//www.usu.edu/~cpl/index.html
Date: Tue, 30 Sep 1997 00:01:24 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 28 Sep 1997 to 29 Sep 1997
Date: Tue, 30 Sep 1997 00:01:24 -0600
Reply-To: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
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From: Automatic digest processor (LISTSERV@CRCVMS.UNL.EDU)
Subject: AGMODELS-L Digest - 28 Sep 1997 to 29 Sep 1997
To: Recipients of AGMODELS-L digests (AGMODELS-L@CRCVMS.UNL.EDU)
There are 6 messages totalling 266 lines in this issue.
Topics of the day:
1. History
2. pesticide properties database (2)
3. diff. coeff. for bentazone
4. The history of ag modeling.
5. Grow Chamber Model
Date: Mon, 29 Sep 1997 15:29:36 +0800
From: Lianhai Wu (lwu@MX.CEI.GO.CN)
Subject: History
Dear AgModels-L list members,
I am newcomer of the AgModels-L as the current address although I had been
in the group for about two years.
The manager of the mail group suggested me briefly review the history of the
simulation models. From my point of view, ELCROS, created by Centre for
Agrobiological Research (CABO), the Netherlands in the early 70's is the
first crop simulation model presented in computer in the world. I am sure
many models popular today are based on the ideals.
Dr. Lianhai Wu
Department of Agrometeorology
Institute of Resources & Environments
China Agricultural University
(Formerly Beijing Agricultural University)
West Campus
Beijing 100094
China
Voice: +86 10 6289 3506
Email: lwu@mx.cei.go.cn
Date: Mon, 29 Sep 1997 16:42:31 +0100
From: Sweeney Paul PJJ (Paul.P.J.J.Sweeney@GBJHA.ZENECA.COM)
Subject: pesticide properties database
Hi all,
apologies for using this discussion group as a message service, but
could the person who responded to my earlier note about the pesticide
properties database please get in contact with me as I have an urgent need
to get data from it.
many thanks,
Paul
Paul Sweeney
Mathematical Modeller
Zeneca Agrochemicals
Jealott's Hill research Station
Bracknell, Berks
U.K.
tel +44 1344 413614
e-mail paul.sweeney@gbjha.zeneca.com
Date: Mon, 29 Sep 1997 13:19:47 -0400
From: "McFadden, James" (McFadden_J@RICERCA.COM)
Subject: Re: pesticide properties database
Dear Paul:
While I wasn't the person you corresponded with previously, I can say
that the site still does not respond (www.arsusda.gov). If you find out
what the problem is, please let others know. Thanks.
Jim McFadden
Dept. of Environmental and Metabolic Fate
Ricerca, Inc.
) ----------
) From: Sweeney Paul
) PJJ[SMTP:Paul.P.J.J.Sweeney@GBJHA.ZENECA.COM]
) Sent: Monday, September 29, 1997 11:42 AM
) To: AGMODELS-L@crcvms.unl.edu
) Subject: pesticide properties database
)
) Hi all,
) apologies for using this discussion group as a message
) service, but
) could the person who responded to my earlier note about the pesticide
) properties database please get in contact with me as I have an urgent
) need
) to get data from it.
)
) many thanks,
)
) Paul
)
) Paul Sweeney
) Mathematical Modeller
) Zeneca Agrochemicals
) Jealott's Hill research Station
) Bracknell, Berks
) U.K.
)
) tel +44 1344 413614
) e-mail paul.sweeney@gbjha.zeneca.com
)
Date: Mon, 29 Sep 1997 20:36:15 +0100
From: Martin Larsson (Martin.Larsson@MV.SLU.SE)
Subject: diff. coeff. for bentazone
Hi,
I also have problems to get in contact with the pesticide properties
database. But someone else can perhaps help me with information on diffusion
coefficient for BENTAZONE in free water ?
Thanks Martin
_______________________________________________________
Martin Larsson (PhD student)
SLU
Department of Soil Sciences
Division of Water Quality Management
P.O. Box 7072
S-75007 Uppsala
Sweden
Phone: +46 18 671169
Telefax: +46 18 673430
E-mail: Martin.Larsson@mv.slu.se
_______________________________________________________
Date: Mon, 29 Sep 1997 14:51:42 -0500
From: "E. John Sadler" (sadler@SUNBRN.FLORENCE.ARS.USDA.GOV)
Subject: Re: The history of ag modeling.
Greetings,
For what it's worth...
In a review of crop simulation models for my dissertation (1983), I
considered the first comprehensive work to be that of Monsi and Saeki
(1953) Uber der Lichtfaktor in den Pflanzengesellschaften und siene
Bedeutung fur die Stoffproduktion. Jap. J. Bot. 14:22-52. (the
English version by Kanasagi and Monsi in 1954 is easier to read! Jap.
J. Bot. 14:304-324) This emphasized the importance of light in dry
matter production and was the first I found to divide the canopy into
layers. Monteith (1965), De Wit (1965) and Duncan et al (1967) all
modeled photosynthesis based on radiation interception. Stewart and
Lemon (1969) in an interim report described simulation of net
photosynthesis using Duncan's light interception model. Lemon,
Stewart, and Shawcroft (1971) followed up with "The sun's work in a
cornfield" in Science. Several papers from 1968 to 1978 followed up
on Duncan's work, including those by Loomis, Williams, and Duncan
himself.
The state of the art at the time (1970) was described in the IBP/PP
technical meeting "Predeiction and measurement of photosynthetic
productivity" in Trebon, Czechoslovakia, in September 1970. ELCROS
was described there by De Wit et al. Several papers there reviewed
models (Ross, Anderson, and Kuroiwa, separately), which might be a
good place to go for historical review. Others, including B. Acock
(Basil, that was you, right?), JHM Thornley, Monsi, OT Denmead,
Uchijima, Tooming, and McCree presented papers on processes within
models.
Anyone interested in citations contact me directly. If I still have
this in ASCII form (word processors were somewhat more primitive back
then!), I can e-mail some of them to you, but I don't want to fill
everyone's in boxes with them.
Cheers
John
==============================================================
E. John Sadler, Ph.D.
USDA-ARS sadler@florence.ars.usda.gov
Coastal Plains Soil, Water,
and Plant Research Center 803-669-5203x112 (voice)
2611 West Lucas St. 803-669-6970 (fax)
Florence, SC 29501-1241
U.S.A.
==============================================================
Date: Mon, 29 Sep 1997 15:03:51 +0000
From: drake@EROLS.COM
Subject: Re: Grow Chamber Model
)
) Subject: Re: Grow Chamber Model
) Date: Sat, 27 Sep 1997 16:24:15 +0000
) From: Oscar Monje (oscar@MENDEL.USU.EDU)
)
) drake.
)
) It seems that having a hexagon (or other geometry..) will cause a
) great deal of sidelighting to fall on you plants.
)
) This would complicate the inputs of any light interception model you
) try to use to simulate conditions on your chamber (but maybe youre
) not going to do this?). As far as using mylar, you should be aware
) that it will degrade with time and become brittle. We use sheets of
) Coilzac, a thin, highly reflective metal sheet that is put inside EGC
) growth chambers. We built a box around our plants that gives us a
) known, fixed area and this helps us express light interception on an
) area basis.
If you mean by "simulate conditions" that I want to simulate
natural conditions, the answer is no. I am interested in
scientifically growing plants, deleting (or highly minimizing) all
limiting factors to enhance growth to greatly accelerated rates.
I suggested a hexagonal shape as a possibility because of the
"Phototron" by Pyraponic Industries, which chose the shape I assumed
due to something in the geometry that makes it more effective than
another shape; perhaps this was just done for appearance then?
Where can I purchase "Coilzac"? If not from a local store, than
where mailorder (preferably with a web-page)? By the way, what is an
"EGC" growth chamber? I am not incredibly familiar with this field
and am relying on basic sciences to design the growth chamber, so
excuse my lack of familiarity with this area. :)
) As far as the co2 enrichment system goes, you may consider having a
) blower with a rotameter and a tank of pure co2 (depending on your
) air flow). This could be upgraded to a mass flow controller and a
) PID based control system. You may have to blow the co2 through
) potassium permanganate (Air Repair) to remove ethylene contaminants
) from the tank gas.
I do not have the money to invest in a CO2 tank at this time, and
will have to use the yeast/sugar/water method for now. On that topic,
during the 18 hour photoperiod is it beneficial to fill the chamber
completely with CO2?
) The only major difference between the MH and HPS is that MH lamps
) provide blue light and HPS doesn't, which may affect stem elongation
) etc. Otherwise both provide sufficient PPF, we get close to 2000 umol
) m-2 s-1 over an area of 1 m2 with only 4 HPS lamps. We also use a
) recirculating water bath under the lamps to remove a great of heat
) (nonphotosynthetic longwave radiation) which helps the leaf
) temperatures to remain well below air temp (1-2 degrees).
)
) I hope this helps.
)
) OM
Mr. Monje,
Could you please break down for me some of that great information
you had in your reply and use some more layman's terms and detail?
Thank you for your help with this project, I appreciate it and I need
to get working on this to have it ready soon since winter is
approaching. :)
Matt
drake@erols.com
Prepared by Steve Modena, AB4EL
Suggestions and comments to: modena@SunSITE.unc.edu