Agronomy and Horticulture, Department of
Manure Phosphorus and Surface Water Protection IV: Assessment of the Risk of Agricultural P Delivery
Document Type
Learning Object
Date of this Version
2005
Citation
Plant and Soil Sciences eLibrary (PASSeL) Lesson
A contribution of the University of Nebraska Cooperative Extension, Journal Series 1074
Abstract
Addresses the assessment of potential for P delivery to surface waters resulting from the interaction of the source and transport factors addressed in Lessons II and III. The basic concepts and applications of P indexes as risk assessment tools are explored.
Overview
Assessment of the potential for P delivery from agricultural land to surface waters is important in developing management plans for reducing P losses to surface waters. The assessment should enable producers and other agribusiness professionals to identify high risk areas, diagnose major causes of P loss, and evaluate the effectiveness of alternative management practices.
This lesson addresses the assessment of potential for P delivery to surface waters resulting from the interaction of the source and transport factors addressed in Lessons II and III. The basic concepts and applications of P indexes as risk assessment tools are explored.
Objectives
Upon completing this lesson, a student should be able to:
- Discuss the 'critical source area concept' relative to P delivery to surface waters.
- Understand and be able to use two P indexes for risk assessment.
- Determine the effects of different management practices on the estimated risk of P loss from agricultural land.
Modules:
Comments
Copyright © 2005 Charles Wortmann, David Tarkalson, and Deana Namuth. Used by permission.
This project was supported in part by the National Research Initiative Competitive Grants CAP project 2011-68002-30029 from the USDA National Institute of Food and Agriculture, administered by the University of California-Davis and by the National Science Foundation (NSF), Division of Undergraduate Education, National SMETE Digital Library Program, Award #0938034, administered by the University of Nebraska. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the USDA or NSF.
Development of this lesson was supported, in part, by a University of Nebraska Cooperative Extension grant. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors.