ABSTRACT
The loss of phosphorus (P) in agricultural runoff and its input to freshwater bodies is known
to accelerate eutrophication (Carpenter et al. 1998; U.S. Geological Survey 1999; Sharpley
2000). As eutrophication of surface water impairs its use for recreation, drinking, and
commercial fishing, several strategies have been put in place to minimize impairment by
reducing the potential for P loss from agricultural operations (Gibson et al. 2000; U.S.
Environmental Protection Agency 2004).
