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Compendium on methods and tools to evaluate impacts of, and vulnerability and adaptation to, climate
change
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Alfalfa 1.4
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Description
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Alfalfa 1.4 is a DOS, Windows, or Macintosh based model that simulates growth and development of
the alfalfa plant, based on integrative plant physiology and morphology.
The model permits simulation of the diurnal patterns of production processes and growth for
studying the influences of temperature, radiation, water deficit, and carbon supply. Beginning with
tissue and organ level information, the growth of shoots is simulated for up to five age classes of
stems. Perennial, underground structures (crown, taproot, and fibrous roots) are simulated over 10
soil layers. The model includes variations in plant population so that overwintering and stand
persistence can be simulated.
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Appropriate Use
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Suited to a wide range of management issues and for coupling to insect and disease models. Several
usual adaptation strategies for coping with climate change (changes to cultivars, planting dates) may
be tested.
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Scope
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All locations; agricultural sector; site-specific.
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Key Output
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Total above-ground biomass (edible yield).
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Key Input
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Daily weather data from standard meteorological reports.
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Ease of Use
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Relatively easy to use with sufficient background.
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Training Required
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Advanced programming skills (knowledge of FORTRAN language) helpful, agronomic background required
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Training Available
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No formal training currently offered beyond the training manual.
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Computer Requirements
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DOS, Windows, or Macintosh environments. Instructions for downloading given at the website.
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Documentation
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Denison, R.F. and B. Loomis. 1989. An Integrative Physiological Model of Alfalfa Growth and
Development. UC ANR Publication 1926, University of California, Davis.
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Applications
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Used by farmers in the U.S.
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Contacts for Framework, Documentation, Technical Assistance
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R. Ford Denison
Agronomy and Range Science, University of California, Davis, 95616, USA; Tel: +1.530.752.9688;
e-mail: rfdenison@ucdavis.edu.
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Cost
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Program and manual available for US$25. Order form can be accessed at http://www.ipm.ucdavis.edu/IPMPROJECT/order.html.
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References
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Denison, F. and B. Loomis. 1989. An Integrative Physiological Model of Alfalfa Growth
and Development. UC ANR Publication 1926. University of California, Davis.
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