Potassium Fixation as Affected by Alternate Wetting and Drying in Some Soil Series of Jharkhand

The effect of alternate wetting and drying, application of different concentrations of K and effect of different period of incubation on potassium fixation capacity in soils of five dominant soil series of Jharkhand were evaluated. The fixation of K increased significantly due to alternate wetting and drying up to 10 cycles only and after that the increase in magnitude of K fixation was not considerable in all soils of these series. The amount of fixed K increased with increasing levels of added K up to 20 mg per 100 g soil level and there after, it attained a plateau. The incubation study indicated that K fixation increased with time of incubation (1, 3, 5, 7, 9 and 11 days), increase being high up to 3 days in all soils of these series.