1. General Model Information

Name: Soybean and Wheat Growth Models of Sinclair

Acronym: SOYBEAN

Main medium: air+terrestrial
Main subject: biogeochemistry
Organization level: ecosystem
Type of model: compartment model
Main application:
Keywords: crop growth, soybean, wheat, mechanistic, temperature, rainfall,solar radiation


Thomas Sinclair
University of Florida
Bldg. 164Gainesville
FL 32611
Phone: 904-392-6180
Fax : 904-374- 5852


Thomas Sinclair


The soybean and wheat growth models of Sinclair et al. (Sinclair et al., 1986) are mechanistic models that examine how temperature, rainfall and solar radiation impact soybean crop yields. The models use daily weather data (solar radiation, minimum and maximum temperatures and precipitation) to predict daily leaf area index, biomass accumulation, seed growth and seed weights. The models are written in BASIC and run in a DOS environment.

Author of the abstract:


II. Technical Information

II.1 Executables:

Operating System(s): DOS

II.2 Source-code:

Programming Language(s): BASIC

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

Weather, organic nitrogen, solar radiation (optional),

III.2.1 Input

Weather, organic nitrogen, solar radiation (optional),maximum depth of rooting, min/ max temperature, precipitation. Daily leaf area index, biomass accumulation, seed growth, seed weights,

III.2.2 Output

Daily leaf area index, biomass accumulation, seed growth, seed weights,Transpiration and soil evapotranspiration. Accumulated water.

Temporal Scale: Daily

Spatial Scale: Plot

IV. References

Sinclair, T.R. 1986. Water and nitrogen limitations in soybean grain production. Field Crops Research 15:125-141.

V. Further information in the World-Wide-Web

VI. Additional remarks

Global change implications: These models could be used in global changeresearch to understand how changes in temperature, solar radiation and precipitation might affect soybean and wheat yields.

Last review of this document by: T. Gabele: 08. 07. 1997 -
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:50 CEST 2002

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