Evaluation of Fertilizer Nitrogen Applications With and Without Ammonium Sulfate in Selected Vegetable Crops
IPNI-1999-USA-MD11
03 Feb 2004
2003 Annual Interpretive Summary
Evaluation of Fertilizer Nitrogen Applications with and without Ammonium Sulfate in Selected Vegetable Crops, 2003
The objective of this study is to measure the influence of ammonium sulfate (AS) blended with ammonium nitrate on the yield of irrigated sweet corn. In 1999, sweet corn yields increased from 1.6 to 6.5 t/A in response to application of 120 lb of nitrogen (N)/A. During the 2000 season, blending AS into the N supply increased the yield of sweet corn by 5%. Yields as high as 8.3 t/A were achieved when AS was applied at row closure. In 2002, top yields were about 5.8 t/A and were unaffected by N source. In 2003, strip-tilled sweet corn yielded as high as 9 tons per acre with a blend including ammonium sulfate; 16 percent higher than when fertilized with urea alone. MD-11F