Study: Farm Manure Injection Reduces Phosphorus Runoff

Widespread adoption by dairy farmers of injecting manure into the soil instead of spreading it on the surface could be crucial to restoring Chesapeake Bay water quality, according to researchers who compared phosphorus runoff from fields treated by both methods.

However, they predict it will be difficult to persuade farmers to change practices.

In a four-year study, overland and subsurface flows from 12 hydrologically isolated research plots at Penn State's Russell E. Larson Agricultural Research Center were measured and sampled for all phosphorus constituents and total solids during and af...