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Interchange between inorganic and organic nitrogen in soils

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  • Broadbent, F. E.

Abstract

Immobilization of fertilizer nitrogen and mineralization of soil organic nitrogen were measured in three soils receiving ammonium sulfate or calcium nitrate labelled with the N15 tracer. In the presence of added straw deficient in nitrogen the rate of nitrogen immobilization was strongly temperature dependent, whereas the total quantity of nitrogen eventually incorporated in the organic fraction was little affected by temperature. Nitrifying bacteria were able to compete effectively for ammonium with the heterotrophic population in all three soils. Little remineralization of tagged nitrogen occurred, suggesting progressive stabilization of immobilized nitrogen.

Suggested Citation

  • Broadbent, F. E., 1966. "Interchange between inorganic and organic nitrogen in soils," Hilgardia, California Agricultural Experiment Station, vol. 37(6).
    • Handle: RePEc:ags:hilgar:381911
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