Oklahoma State University

Water Use Efficiency

Crop water use efficiency (CWUE) can be defined in many ways.  However, the basic term describes the amount of harvestable biomass produced by a crop per unit of water transpired.  This value is generally constant for a given crop but will vary slightly due to differences in environmental conditions that influence crop water demand such as relative humidity and solar radiation intensity. The term water use efficiency is also often used to describe the crop yield produced per unit of irrigation water applied or precipitation received.   Irrigation use efficiency or precipitation use efficiency can be highly variable for a given crop and will be influenced by both environmental conditions and crop management practices.
Learn more about CWUE of crops grown in Oklahoma and the fate of rainwater in OK from Factsheet PSS-2140.

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