Alfalfa Yield Response to Shallow Groundwater

by K. L. Marston, Univ of Nevada Reno, United States,
J. C. Guitjens, Univ of Nevada Reno, United States,

Document Type: Proceeding Paper

Part of: Planning Now for Irrigation and Drainage in the 21st Century


Operating Criteria for the Newland Project assume that crops grown on bottomlands will use some shallow groundwater as partial fullfillment of evapotranspiration demand. Three years of data from these bottomlands were collected for alfalfa yield and water table depths during 1982-1984. Analysis of variance and a significant difference test indicate that water table had no significant influence on sustaining yield in the absence of irrigation. Multiple regressions found strongest correlations of alfalfa yield with irrigation and not with shallow groundwater. This study concludes that alfalfa, when stressed through deficit irrigation, did not use shallow groundwater to meet evapotranspiration demand.

Subject Headings: Vegetation | Groundwater | Soil water | Water resources | Data collection | Water yield | Regression analysis | Irrigation water

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