**AWARDS ISSUED PRIOR TO JANUARY 20, 2025, WERE FUNDED UNDER PREVIOUS ADMINISTRATIONS AND MAY NOT REFLECT THE PRIORITIES AND POLICIES OF THE CURRENT ADMINISTRATION.** THE GOAL OF THE PROPOSED PROJECT IS TO DEVELOP STRATEGIES FOR PRECISION IRRIGATION MANAGEMENT AND ASSESS MORE SUSTAINABLE AND RESILIENT CROPPING SYSTEMS FOR COTTON GROWN IN THE SOUTHWEST BY INTEGRATING PRECISION CONSERVATION AND CLIMATE-SMART AGRICULTURE (CSA) PRACTICES. SPECIFICALLY, THE OBJECTIVES ARE TO: 1) DEVELOP AND TEST PRECISION WATER MANAGEMENT ALGORITHMS AND STRATEGIES THAT INTEGRATE RESILIENT CROPPING SYSTEMS FOR SUSTAINABLE AGRICULTURAL PRODUCTION IN A SEMI-ARID AND WATER-LIMITED AGROECOSYSTEM; 2) BUILD A SIMULATION SYSTEM TO ASSESS AND PREDICT THE RESILIENCE OF DIFFERENT CROPPING SYSTEMS UNDER VARIOUS COMBINATIONS OF CLIMATE CHANGE SCENARIOS AND IRRIGATION RATES. AN ON-FARM EXPERIMENT WILL FOCUS ON DEVELOPING AND VALIDATING AN ALGORITHM AND STRATEGY FOR PRECISION WATER MANAGEMENT, INCORPORATING A RESILIENT CROPPING SYSTEM. THE DECISION SUPPORT FOR AGROTECHNOLOGY TRANSFER (DSSAT) MODELING PROGRAM WILL BE APPLIED TO SIMULATE CROP YIELD, WATER USE, AND IRRIGATION RATES FOR ASSESSING THE CROPPING SYSTEMS INVOLVING COTTON, WHEAT, AND SORGHUM UNDER FOUR PROJECTED CLIMATE SCENARIOS BY THE PANEL ON CLIMATE CHANGE (IPCC), REPRESENTATIVE CONCENTRATION PATHWAYS (RCPS) - RCPS 2.6, 4.5, 6.0 AND 8.5. THE IMPLEMENTATION OF THE ON-FARM TRIAL PROVIDES ESSENTIAL KNOWLEDGE AND INFORMATION FOR THE ADOPTION OF PRECISION IRRIGATION TECHNOLOGY THAT HELPS TO INCREASE WUE, IMPROVE CROP YIELD AND ECONOMIC RETURN. THE SIMULATION RESULTS FACILITATE CRITICAL INFORMATION FOR STAKEHOLDERS TO PROACTIVELY ADAPT TO THE NEW ENVIRONMENT AND CROPPING SYSTEMS, INCLUDING PLANNING AND BALANCING URBAN AND AGRICULTURAL WATER USE, PRIORITIZING RESEARCH TO ADDRESS WATER AVAILABILITY AND CLIMATE CHANGE ISSUES, BREEDING FOR DROUGHT-RESISTANT CULTIVARS, AND ADOPTING SOIL HEALTH-FRIENDLY MANAGEMENT PRACTICES. THE CONCEPTS, DATA SOURCES, AND ALGORITHMS DEVELOPED IN THIS STUDY WILL BE LARGELY APPLICABLE TO OTHER CROPS AND AGRICULTURAL REGIONS WHERE WATER SUPPLIES ARE INCREASINGLY CONSTRAINED.