WWRC 87-05
Crop Yield-Water Use Relations for Wyoming
Abstract
A study was conducted to test existing production models for predicting
yield response to water. The study utilized winter wheat yield data from
Archer, Gillette, and Sheridan, Wyoming for the period 1950 through 1983. The
FAO evapotranspiration and yield-water use models were utilized to estimate
yields which were compared with actual yields at the three sites. Average
estimated yields ranged from 5 percent lower to 13 percent and 22 percent
higher than actual yields at Archer, Gillette, and Sheridan, respectively.
Statistical analyses indicated that there were no significant differences
between the actual and estimated yields at any of the three locations.
Additional studies are being conducted to better define the soil water versus
yield relationships.
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