These lessons are optimized for web viewing and therefore may not have adequate resolution for quality printing. The LPES Curriculum CD available from MWPS contains all lessons at print quality resolution, is searchable, and includes an index and PowerPoint presentations for each lesson. A full, printed version is available as is a 2-CD set of the lessons in PageMaker format. For more information or to purchase LPES materials, contact MWPS by phone at 1-800-562-3618, by fax at 1-515-294-9589, or by e-mail at mwps@iastate.edu For prices and to order on line just click on the Order Products button.

Lesson 34: Phosphorus Management for Agriculture and the Environment -Andrew Sharpley and Ron Sheffield

Intended Outcomes
The participants will

• Recognize the role of phosphorus (P) in controlling eutrophication.
• Identify what happens to P in soil when it is added via manure and fertilizer.
• Learn what practical farming measures can be used to minimize P loss.
• Target cost-beneficial best management practices, understand how water moves within a landscape, and learn where large sources of P exist.
• Review innovative products and measures being developed to help producers manage P.

Contents

1. Introduction
2. Phosphorus and Water Quality
3. Phosphorus in Soil
4. Why Soil P Increases
5. Processes and Pathways of P Transport in Agricultural Runoff
6. Phosphorus Management for Environmental Risk Assessment
7. Remedial Measures
8. Integrated Nutrient Management
9. Summary
10. Bridging Myths and Realities About Agriculture
11. Appendix A. Environmental Stewardship Assessment: Phosphorus Index
12. Appendix B. Regulatory Compliance Assessment: Phosphorus Management

Activities
The participants will

• Determine the risk associated with high soil P.