Estimating Crop Evapotranspiration from Reference Evapotranspiration and Crop Coefficients

This publication presents some of the basics of evapotranspiration, evaporation, and transpiration processes and provides information about some of the influencing factors of these important variables. Additionally, it presents a method to estimate crop water use (actual crop ET) from reference evapotranspiration (ETref) and crop-­specific coefficients (Kc) that can be used for irrigation management for numerous agronomic crops. Some of the publicly available ETref and Kc sources are also provided.