Nutrient Runoff From No-till Corn Soils Amended with Dairy Manure.

Surface application of manure to reduced tillage soils is the most prevalent method of manure application in the Chesapeake Bay Watershed. We sought to quantify differences in nutrient runoff and erosion related to alternative manure application methods, including shallow disk injection, aeration with banded manure, surface application and incorporation by tillage. Trials were conducted in the Ridge and Valley Province of Pennsylvania and Virginia on sites under no-till corn production. Results highlight the role of manure placement on near-term losses of soluble nutrients and diminishing effects with time.