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Effect of Rate and Frequency of Applying Six Nitrogen Sources on Coastal Bermudagrass¹

Synopsis: Coastal bermuda, fertilized for 5 years with 3 rates and 2 frequencies of nitrogen from ammonium nitrate, ammonium sulfate, ammonium nitrate solution, anhydrous ammonia, urea-ammonium nitrate solution, and urea gave relative hay yields of 100.0, 96.2, 98.3, 94.0, 92.3, and 81.3 and relative nitrogen recoveries of 100.0, 98.6, 95.2, 96.4, 86.1, and 74.0, respectively. In sand culture, Coastal bermuda utilized ammonia and nitrate nitrogen equally well. Spring lag in response to anhydrous ammonia was largely due to placement. Splitting nitrogen applications increased yields 0.6 to 1.2 tons per acre for all sources but anhydrous ammonia.

² Principal Geneticist and Research Agronomist, respectively, Crops Research Division, ARS, USDA, and University of Georgia, College of Agriculture Experiment Stations, Coastal Plain Experiment Station, Tifton, Georgia. The authors gratefully acknowledge the assistance of J. I. Davis, Jr., Southeastern Liquid Fertilizer Company, Albany, Ga., in constructing and loaning special equipment used in the application of anhydrous ammonia, and grants in aid from Commercial Solvents Corporation, Nitrogen Division of Allied Chemical and Dye Corporation, Escambia Bay Chemical Corporation, Spencer Chemical Company, and U. S. Steel Corporation.

This article has been cited by other articles:

				M. L. Silveira, V. A. Haby, and A. T. Leonard Response of Coastal Bermudagrass Yield and Nutrient Uptake Efficiency to Nitrogen Sources Agron. J., April 4, 2007; 99(3): 707 - 714. [Abstract] [Full Text] [PDF]