Co-Blending Poultry Litter with A Phosphorus Sorbent Prior to Land Application to Reduce Soil Test and Runoff Phosphorus.

Poultry litter was co-blended with a phosphorus (P) sorbent (drinking water treatment residual, WTR) to achieve P saturations in the blended material of 1860, 600, 200, and 50%.  Co-blended manure (11.3 Mg ha^-1) was land applied to small field plots and simulated rainfall was used to generate runoff.  Runoff P and soil test P (STP) were evaluated 4 times over a growing season.  Substantial reductions in both runoff P and STP were achieved with WTR additions.