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Abstract

 

This article in SSSAJ

  1. Vol. 30 No. 3, p. 363-366
     
    Received: Oct 1, 1965


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doi:10.2136/sssaj1966.03615995003000030019x

Effect of Soil Mositure on Ammonification and Nitrification in Two Northern Plains Soils1

  1. G. A. Reichman,
  2. D. L. Grunes and
  3. F. G. Viets2

Abstract

Abstract

Samples of a Chestnut and Chernozem soil, with and without additions of (NH4)SO4 and K2HPO4, were incubated at constant water contents ranging from suctions of 0.2 to about 100 bars, and the exchangeable NH4- and soluble NO2-N measured periodically. NO2-N in excess of 1/3 ppm was never detected. Addition of P had no effect on N transformations. Ammonification and nitrification of soil N were almost directly proportional to soil water content at suctions between 0.2 and 15 bars. Measurable ammonification and nitrification occurred at a suction of 15 bars.

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