April 2026 issue

Volume 59, Issue 4

This month, our featured article explains how evapotranspiration (ET) is defined and estimated in modern agricultural water management, emphasizing the importance of consistent terminology and standardized methods. It outlines how reference evapotranspiration (ETref) and crop coefficients are used together to estimate crop water use and highlights best practices for applying these concepts using mesonet data and other tools.

Illustration courtesy of USGS. View the article.