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A Computer Program to Analyze Single-Season Crop Model Outputs

Res. and Development Div., Int. Fertilizer DevelopmentCtr., P.O. Box 2040, Muscle Shoals, AL 3566
Dep. of Biological and Agric. Engineering, Georgia Stn., Univ. of Georgia, Griffin, GA 30223

^* Corresponding author (Email: ghoogen{at}gaes.griffin.peachnet.edu).

Computer simulation models of the growth, development, and yield of annual crops can produce large quantities of data, especially if a simulation experiment involves many treatments and replications across different years. Computer software was written to perform simple analyses of such experiments, allowing the user to identify those treatments that are productive, stable, economically attractive, environmentally sound, or otherwise suitable for the purposes of the investigator. The computer program, which runs on a DOS (IBM-compatible) personal computer, can interface with output files produced by any crop model run on any other computer that conforms to a common output file structure. Summary statistics for a wide variety of model output variables are calculated and presented to the user in a number of tabular and graphical forms. Net monetary returns and gross margins can also be calculated, and price-cost variability can be taken into account in the analysis. The user can perform an economic comparison of simulation treatments using mean-Gini stochastic dominance or, visually, meanvariance analysis. The results of all calculations and analyses are written to an output file that can be manipulated by the user to provide input to a spreadsheet or statistical package for further analysis of the simulated data. The program allows rapid, preliminary analysis of treatments from replicated simulation experiments and can help the user to identify particularly promising treatments that warrant further evaluation.

Received for publication September 3, 1993.

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