Abstract
Summary Nitrification potential of five soils of north Karnataka viz., black soil, red soil, paddy soil, forest soil and a sodic soil amended with urea and ammonium sulphate (@ 4 mg NH+4-N 10 g−1 soil) was studied. Both the fertilizers significantly enhanced the nitrification potential of all the soils. Addition of urea enhanced nitrification potential significantly over addition of ammonium sulphate in all the soils except red soil. The lowest nitrification potential was recorded in forest soil irrespective of the addition of ammoniacal fertilizers. The change in nitrification potentials of soils with respect to physico-chemical properties are also discussed.
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