Indiana Soybean System Model (ISSM): I. Crop model evaluation

A soybean crop model, SOYGRO version 5.41, satisfactorily simulates soybean growth, development and yield under Indiana conditions, following the calibration of varietal coefficients and the use of water retention values to approximate soil water limits. Century 84 (MG II) and Williams 82 (MG III) soybeans were grown at two locations during 1985–1989 to provide crop growth and yield data for model calibration and validation.