Using the Chesapeake Bay as a case study, Agriculture and Phosphorus Management discusses the impact and management of phosphorus in watersheds. Although urban and other sources contribute phosphorus to the Bay, the papers presented focus on how its role in agriculture impacts water quality. They review the new guidelines and legislation slated for implementation by 2002 directed towards sustainable nutrient management and strategies for implementing them.
Phosphorus, an essential element for plant and animal growth, has long been recognized as necessary to eliminate deficiencies and to maintain profitable crop and livestock production. It can increase the biological productivity of surface waters by accelerating eutrophication. Human activities accelerate the rate of eutrophication - principally by increasing the rate at which phosphorus enters the aquatic system.
Written by experts from a range of disciplines Agriculture and Phosphorus Management provides a deeper understanding of the diverse, dynamic, and complex factors controlling the impact of agricultural phosphorus management on production and water quality. Each contributor addresses the questions: what do we know, what do we still need to know, where are the major gaps in our knowledge, and how does the information relate to phosphorus management strategies in the Bay Watershed, and other watersheds? As a result this series of papers provides a unique collection of information of regional, national, and international significance and gives prioritized phosphorus management options for not only the Chesapeake Bay Watershed, but for watersheds around the world.
Table of Contents
IMPACT OF PHOSPHORUS ON THE CHESAPEAKE BAY
Phosphorus and the Chesapeake Bay, W. Matuszeski
Inputs of Phosphorus to the Chesapeake Bay Watershed, A. Taylor and H. Pionke
Impact of Nutrient Inflows on Chesapeake Bay, W. Boynton
SOURCES AND TRANSPORT OF AGRICULTURAL PHOSPHORUS WITHIN THE CHESAPEAKE BAY WATERSHED
Phosphorus Dynamics in Soils of the Chesapeake Bay Watershed: A Primer, F. Coale
The Role of Soil Testing for Environmental Risk Assessment, T. Sims
Critical Areas of Phosphorus Export from Agricultural Watersheds, W. Gburek, A. Sharpley, and G. Folmar
TRANSFER OF PHOSPHORUS FROM THE FARM TO THE BAY SCALE
Pathways of Phosphorus Transport, L. Hearthwaite, P. Haygarth, and R. Dils
Transfer of Phosphorus from the Farm to the Bay, D. Correll, T. Jordan, and D. Weller
DEVELOPMENT OF INTEGRATED NUTRIENT MANAGEMENT PLANNING IN THE CHESAPEAKE BAY WATERSHED
Nutrient Management: Regional Issues Affecting the Chesapeake Bay, L. Lanyon
Integrating Phosphorus and Nitrogen Management at the Farm Level, D. Beegle
On-Farm Management Options for Controlling Phosphorus Inputs to the Chesapeake Bay, P. Steinhilber and R. Weismiller
FUTURE TRENDS FOR PHOSPHORUS MANAGEMENT IN THE CHESAPEAKE BAY WATERSHED
Perspectives of Bay Users, J. Hostetter, D. Brubaker, W. Carmean, and T. Garrett
Concerns and Recommendations of the Workgroups, A. Wolf, A. Sharpley, L. Ressler, T. Esser and L. Lanyon
Concluding Remarks: Future Strategies to Meet the Agricultural and Environmental Challenges of the 21st Century, A. Sharpley