Abstract
Inhibitory effect of potassium chloride on nitrification of ammonium sulfate and urea in acid, neutral and calcareous soils was observed in an incubation study. In acidic soil, NO 3 − −N production in soil treated with urea was retarded by addition of KCl. NO 3 − −N concentration was much less even in comparison to control where ammonium sulfate and KCl were added together which might be due to cumulative effect of Cl− and SO 4 −2 ions. In neutral and calcareous soils, nitrification inhibition was less conspicuous.
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