Modeling plant competition with the GAPS object-oriented dynamic simulation model
1999
Rossiter, D.G. | Riha, S.J.
Modeling interspecies competition is a natural application for dynamic simulation models of agricultural systems. We extended a dynamic simulation model of the soil-plant-atmosphere system, GAPS, to include the case where multiple plant species are growing in competition. The competition model was implemented as an object hierarchy that exchanges information with a crop model hierarchy by means of access procedures. Crop models, atmospheric procedures, and soil-plant water interface procedures required minimal change in order to support the competition model. We implemented two competition models: modified ALMANAC and winner-takes-all. The modified ALMANAC model requires that crop models of competing plants simulate leaf area index, single-crop light interception, and canopy height. Using this information, the ALMANAC model partitions solar radiation among the competitors. GAPS is written in the object-oriented language Turbo Pascal.
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