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This article in SSSAJ

  1. Vol. 31 No. 5, p. 707-708
    Received: June 11, 1967
    Accepted: July 20, 1967

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Fractionation of Nitrogen in Three Forest Soils1

  1. J. R. Jorgensen2



Soil nitrogen of forested Georgeville, Colfax, and Iredell soils from the North Carolina Piedmont was separated into six fractions. Amino acid N made up over 50% of soil N, while hydrolyzed NH4+ + amino sugar-N was 22% of the total N. Proportions of exchangeable NH4+ + NO3, insoluble humin N, and hydrolyzed NH4+ + amino sugar N differed with soil. The differences appeared to be related to base saturation and pH.

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