Evaluation of Fertilizer Nitrogen Applications With and Without Ammonium Sulfate in Selected Vegetable Crops
IPNI-1999-USA-MD11
02 May 2002
2001 Annual Interpretive Summary
Evaluation of Fertilizer Nitrogen Applications with and without Ammonium Sulfate in Selected Vegetable Crops, 2001
The objective of this study is to measure the influence of ammonium sulfate [(NH4)2SO4] blended with ammonium nitrate (NH4)2NO4on the yield of various vegetable crops. In 1999, sweet corn yields increased from 1.6 to 6.5 tons/A in response to application of 120 lb N/A. During the 2000 season, blending (NH4)2SO4 into the N supply increased the yield of sweet corn by 5 percent. Yields as high as 8.3 tons/A were achieved when ammonium sulfate was applied at row closure. In 2001 the apparent response at row closure was studied further. In addition, an (NH4)2SO4 amendment to Perdue AgriRecycle Poultry manure pellets was studied as a nutrient source. MD-11F