University of Missouri Extension

NCR187, New January 2006

Agricultural Phosphorus Management and Water Quality Protection in the Midwest

Editor's note
The following abstract describes a publication that is only available as a downloadable PDF. Please see link to the PDF file on this page.

NCR187 coverNorth Central Regional Publication
Charles Wortmann
Nutrient Management Specialist
University of Nebraska-Lincoln


Phosphorus (P) is an essential nutrient for growth of crops and aquatic vegetation and often needs to be applied to land for optimal crop growth. Land application of P as animal manure, biosolids (sewage sludge), and mineral fertilizer can increase the risk of P pollution of freshwater.

The movement of P from agricultural land to surface and ground water is a complex process involving multiple pathways. Phosphorus moves into surface freshwaters dissolved in runoff water and attached to particulate matter eroded from the land. Recently applied P is particularly prone to losses and is affected by factors such as the form of P applied, the time since application, and the placement. The factors contributing to P loss from agricultural land to surface waters are commonly grouped as source (site and management) factors and transport factors.

This publication is targeted to U.S. EPA Region 7 comprised of Iowa, Kansas, Missouri and Nebraska.

Iowa State University
Kansas State University
University of Nebraska-Lincoln
USDA-ARS National Soil Tilth Laboratory



NCR187 Agricultural Phosphorus Management and Water Quality Protection in the Midwest | University of Missouri Extension

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