** 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 WORLD'S POPULATION IS EXPECTED TO REACH 10 BILLION BY 2050, AND FARMERS WILL NEED TO INCREASE FOOD PRODUCTION ON AGRICULTURAL LANDS THAT WILL ALSO FACE INCREASED DEMAND FOR OTHER USES. THIS PUTS DIRECT PRESSURE ON FARMERS TO SIMULTANEOUSLY INCREASE PRODUCTION AND REDUCE THE ECOLOGICAL IMPACTS OF AGRICULTURE ON AN INCREASINGLY PRECIOUS LAND BASE. INCORPORATING COVER CROPS, APPLYING ORGANIC SOIL AMENDMENTS, AND ENHANCING THE DIVERSITY AND FUNCTION OF SOIL MICROORGANISMS ARE PRACTICES THAT CAN INCREASE SOIL HEALTH AND OVERALL SUSTAINABILITY, BUT AT THE SAME TIME HAVE PROVEN CHALLENGING TO IMPLEMENT IN DRYLAND AGRICULTURAL SYSTEMS. OUR PROJECT SEEKS TO EVALUATE CROP ROTATIONS AND ORGANIC AMENDMENTS AND TO DOCUMENT THE EFFECTS OF THESE ORGANIC PRACTICES ON SOIL HEALTH AND FERTILITY. OUR RESEARCH ADDRESSES THE RISING INTEREST IN SUSTAINABLE PRACTICES AMONG PRODUCERS AND CONSUMERS ALIKE, BY FOCUSING ON THE SPECIFICS OF MEETING CROP NUTRITION NEEDS WITH SUSTAINABLE INPUTS. THE OBJECTIVES OF THE PROPOSED WORK ARE TO MEASURE CROP PRODUCTIVITY AND PLANT UPTAKE OF NUTRIENTS FROM ORGANIC SOURCES IN RESPONSE TO DIFFERENT CROP ROTATIONS AND ORGANIC NUTRIENT INPUTS. OUR MULTIDISCIPLINARY RESEARCH TEAM WILL UTILIZE FIELD AND GREENHOUSE STUDIES IN CONJUNCTION WITH MOLECULAR METHODS TO MEASURE NUTRIENT PARTITIONING AND DESCRIBE THE SOIL MICROBIAL COMMUNITY TO MEASURE CROP PRODUCTIVITY IN RESPONSE TO INTEGRATION OF MULTIPLE ORGANIC NUTRIENT SOURCES AND MANAGEMENT PRACTICES. THESE RESULTS WILL HELP ORGANIC GROWERS OPTIMIZE NUTRIENT MANAGEMENT SUSTAINABLY WHILE IMPROVING PRODUCTIVITY AND SOIL HEALTH.