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Water Production Functions for Central Plains Crops

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  5th National Decennial Irrigation Conference Proceedings, 5-8 December 2010, Phoenix Convention Center, Phoenix, Arizona USA  IRR10-9654.(doi:10.13031/2013.35820)
Authors:   Thomas J Trout, Walter C Bausch, Gerald W Buchleiter
Keywords:   Irrigation management, deficit irrigation, productivity, crop stress

Sustaining irrigated agriculture with limited water supplies requires maximizing productivity per unit of water. Relationships between crop production and water consumed are basic information required to maximize productivity. This information can be used to determine if deficit irrigation is economically desirable and how to best manage limited water supplies. Field trials of corn, sunflower, dry bean, and wheat production with six levels of water application were used to develop water production functions based on consumptive use and to better understand water timing effects and crop responses to stress. Initial results indicate linear relationships between yield and crop ET and transpiration. The field data are being used to improve and validate crop models so they can be used to generalize the field results for other climate and soil characteristics.

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