Crop Growth Models in Irrigation Management: Applications and Limitations

by Ronald L. Elliott, Oklahoma State Univ, Stillwater, United States,



Document Type: Proceeding Paper

Part of: Irrigation and Drainage

Abstract: Crop growth models can provide helpful input to the complex process of on-farm irrigation decision making. The use of crop models in irrigation management will likely expand due to improved modeling capability, better data availability, and continued emphasis on water conservation and water quality. With regard to pre-season water management, the results of simulation modeling can aid in selecting crops, allocating water to those crops, and evaluating general irrigation strategies. Within a given irrigation season, crop models can provide a tool for analyzing the yield impacts associated with real-time irrigation scheduling decisions. Limitations associated with these modeling applications are related to model incompleteness and uncertainty, spatial variability in the field, and the difficulty in projecting the final yield response to a series of individual irrigation decisions.

Subject Headings: Irrigation | Crops | Simulation models | Hydrologic models | Data processing | Water conservation | Water quality | Resource management

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