ABSTRACT
The number of confined animal feeding operations in the United States has increased dramatically over the last half century. Manure from these operations is most often land applied to pastures or cropland. Runoff from land, where manure has been applied, has been implicated in eutrophication of U.S. surface waters. Phosphorus from these non-point sources is of great concern in most areas of the United States where the animal industries are concentrated. This article discusses feed and manure treatment methods that can be used to reduce the potential impact of manure on surface water quality, and other management strategies that producers can use to further reduce these risks.
