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Nitrate Content of Soils and Nitrogen Content of Oat Plants as Affected by Rates of Liming¹

Synopsis: Lime brought about moderate increases in the amount of nitrate nitrogen in an acid Skyberg silt loam under fallow. Moderate rates (4 tons per acre) were as effective as heavy rates (16 tons per acre). Fallowing for 2 years resulted in the accumulation of up to 1,000 pounds of nitrate per acre in the top 2 feet of soil. Nitrate in a successively cropped soil amounted to only a few pounds per acre. Consistent, but seldom statistically significant, increases in the nitrogen content of oats were brought about by lime applications.

² Former graduate student and Professor of Soils, University of Minnesota, respectively. Senior author is now at the United States Salinity Laboratory, Riverside, California.