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Recovery of ammonium nitrogen from soils

Recovery of ammonium nitrogen from soils

Soil Sci 90(2): 93-97

The recovery of added ammonium N from soils was studied by 2 common extraction procedures, sodium acetate-acidic acid and potassium chloride-hydrochloric acid. In acid soils, recoveries of N were consistently lower from NH4CI and NH4OH than from diammonium phosphate and ammonium nitrate. This indicates a small but measurable effect of the anion on the N recovery. An alkaline soil, in the wet condition, fixed considerable amounts of added N. Oven and air-drying of this soil brought about smaller recoveries of N than in the wet condition indicating a possible sizeable loss by volatilization. In a tracer experiment, the recovery of labeled N was invariably less than that of the total ammonium. Samples of the alkaline soil were particularly low in recovered ammonium suggesting greater losses by volatilization than would be shown by the recovery of total ammonium.

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Accession: 014163514

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DOI: 10.1097/00010694-196008000-00003

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