THIS PROJECT INTEGRATES RESEARCH, EXTENSION, AND EDUCATIONAL ACTIVITIES TO ADDRESS THE STAKEHOLDER IDENTIFIED CRITICAL ISSUE OF PHOSPHORUS (P) IMBALANCE ON THE DELMARVA PENINSULA. WE WILL: (1) INVESTIGATE CURRENT SOIL FERTILITY PRACTICES IN P DEFICIENT AND P SURPLUS AREAS TO IDENTIFY PRACTICES DELMARVA FARMERS ARE WILLING TO ADOPT TO MAXIMIZE CROP YIELDS; (2) ESTIMATE AND MAP (A) THE CURRENT QUANTITY OF EXPORTED LITTER AND (B) THE CURRENT AND POTENTIAL USE (DEMAND) OF POULTRY LITTER ON THE DELMARVA PENINSULA; (3) QUANTIFY THE ECONOMIC AND YIELD BENEFITS OF USING POULTRY LITTER ON LOW P FERTILITY SOILS; (4) DEVELOP A REGIONAL CLEARINGHOUSE TO CONNECT FARMERS WITH A P DEFICIT TO FARMERS WITH P SURPLUS ON THE DELMARVA PENINSULA, AND (5) UPDATE AND DELIVER POULTRY LITTER MANAGEMENT AND SOIL FERTILITY RECOMMENDATIONS FOR REGIONAL GRAIN PRODUCTION TO INCREASE CROP YIELDS IN P DEFICIT AREAS. THE GOAL IS TO BETTER DISTRIBUTE POULTRY LITTER WITHIN THE REGION BY DECREASING APPLICATION OF POULTRY LITTER IN AREAS OF P SURPLUS (E.G., LOWER EASTERN SHORE) AND INCREASING APPLICATION IN AREAS OF P DEFICIT (E.G., UPPER SHORE AND VIRGINIA'S EASTERN SHORE). BETTER DISTRIBUTION OF POULTRY LITTER ON LOW P SOILS WILL IMPROVE GRAIN YIELDS, ACHIEVE P BALANCE IN THE REGION, AND REDUCE CONCERNS ABOUT WATER QUALITY IMPAIRMENT DUE TO EXCESSIVE P LOSS FROM P SATURATED SOILS. THIS PROJECT IS SUBMITTED UNDER THE CRITICAL AGRICULTURAL RESEARCH AND EXTENSION (CARE) PROGRAM AREA (A1701) AND ADDRESSES THREE FARM BILL PRIORITIES: BIOENERGY, NATURAL RESOURCES, AND ENVIRONMENT; AGRICULTURE SYSTEMS AND TECHNOLOGY; AND AGRICULTURE ECONOMICS AND RURAL COMMUNITIES.