**AWARDS ISSUED PRIOR TO JANUARY 20, 2025, WERE FUNDED UNDER PREVIOUS ADMINISTRATIONS AND MAY NOT REFLECT THE PRIORITIES AND POLICIES OF THE CURRENT ADMINISTRATION.** DUE TO POPULATION GROWTH AND SCARCITY OF NATURAL RESOURCES SUCH AS FRESHWATER, AGRICULTURE, THE LARGEST CONSUMER OF FRESHWATER, NEEDS TO ADOPT MORE EFFICIENT IRRIGATION SCHEDULING TECHNOLOGIES THAT NOT ONLY ALLOW MAXIMUM WATER CONSERVATION BUT ALSO IMPROVE WATER QUALITY. IRRIGATION AND NUTRIENT MANAGEMENT GO HAND IN HAND. OUTCOMES OF IMPROVED IRRIGATION MANAGEMENT INCLUDED IMPROVED NUTRIENT MANAGEMENT AND THUS WATER QUALITY. IN THIS REGARD, THE DEVELOPMENT OF IMPROVED IRRIGATION TECHNOLOGIES HAS RESULTED IN SIGNIFICANT WATER SAVINGS. HOWEVER, ANY DATA-DRIVEN TECHNOLOGY WILL BE ONLY AS GOOD AS THE INPUT INFORMATION THAT IT RELIES ON. FOR EXAMPLE, THE EFFECTIVENESS OF WEATHER-BASED IRRIGATION SCHEDULING METHODS DEPENDS ON THE AVAILABILITY OF ACCURATE CLIMATE DATA, INCLUDING EVAPOTRANSPIRATION,AT OPTIMAL SPATIAL AND TEMPORAL RESOLUTIONS. WE PROPOSE TO DEVELOP A METHOD THAT ALLOWS ESTIMATING EVAPOTRANSPIRATION FROM AGRICULTURAL FIELDS. SUCH INFORMATION WILL BE CRITICAL FOR IMPLEMENTING PRECESSION WATER MANAGEMENT PRACTICES AT PLOT AND FIELD SCALES. IN ADDITION, RESULTS WILL ALSO BE USED TO FINE-TUNE CROP AND CLIMATE MODELS THAT IN TURN CAN BE USED TO GUIDE POLICY AND MANAGEMENT DECISIONS.