A system for simulation of crop dynamics is described. It includes a dynamic crop model for several cultures and a model shell. The model permits to simulale crop dynamics on the second level of plant productivity. The model shell serves for organization and implementation of series of computer experiments in dialogue regime. As it is known, soil and climatic conditions in the majority of Russia's regions differ from that in West Europe in a principal way. It especially concerns the continental Russia regions where deep droughts regularly occur, or Northwest regions, which are subjected to excess of water. So a special attention in model development was paid on account of the influence of water stress on plant production process.
During the last two decades, computer simulation models have become powerful tools for investigating agricultural crop dynamics and solving practical problems. Many models have been developed in various countries, which permits exploration of the influence of weather conditions and agricultural strategies on the fate of a crop. However, some fundamental problems related to the description of agricultural plant growth and development remain unsolved. These primarily concern the totality of biological processes such as ontogenetic development and morphogenesis due partly to the lack of knowledge in plant physiology and the absence of realistic ideas about the origin of plant life. These circumstances have forced modelers to use quite sophisticated heuristic approaches rather than biologically sound descriptions. This paper represents the authors’ vision of this situation.
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