Effect of Soil Mositure on Ammonification and Nitrification in Two Northern Plains Soils
1966
Reichman, G. A. | Grunes, D. L. | Viets, F. G.
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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