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Residual Nitrogen from NH<sub>4</sub>NO<sub>3</sub> Fertilizer and from Alfalfa Plowed under<sup>1</sup>
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1963
Year
Synopsis Residual NEngineeringLand UseAgricultural EconomicsLand DegradationSustainable AgriculturePlant NutritionPublic HealthSoil FertilityNh 4BiogeochemistryAgroecosystemNo 3Crop YieldAgricultural HistoryAgricultural ScienceNatural Resource ManagementNutrient CycleResidual NitrogenNutrient Management
Synopsis Residual N from NH 4 NO 3 averaged 44% of the original application after 1 year but was insignificant after 2 years. For a 5‐year period, N uptake from the alfalfa area exceeded that from virgin area by 341 pounds per acre.