Agricultural Phosphorus Management and Water Quality Protection in the Midwest

Editor's note
The following abstract describes a publication that is 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

Co-authors

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
 
  • Matt Helmers, Agricultural and Water Resources Engineer
  • Antonio Mallarino, Soil Fertility and Nutrient Management Specialist
Kansas State University
 
  • Charles Barden, Forestry Specialist
  • Daniel Devlin, Water Quality Specialist
  • Gary Pierzynski, Soil Fertility and Soil Chemistry Specialist
MU
 
  • John Lory, Environmental Nutrient Management Specialist
  • Ray Massey, Agricultural Economist
University of Nebraska-Lincoln
 
  • John Holz, Water Quality Specialist
  • Charles Shapiro, Soil Scientist - Crop Nutrition
USDA-ARS National Soil Tilth Laboratory
 
  • John Kovar, Soil Scientist

Topics

  • Nutrient management planners
  • Risk of phosphorus delivery to surface waters
  • Assessment of risk
  • Management options for reducing risk

Pages

  • 24