Sulphur Retention and Release in Alfisols and Ultisols of Jharkhand

Abstract

Surface soil samples (0-15 cm) from twenty different sites covering four districts of Jharkhand belonging to Alfisols and Ultisols soil order were selected for studies on average equilibrium SO42- application decreased from 4.49 mg/l to 7.01 mg/l at 10 ppm added sulphur, whereas the percentage of sulphate adsorbed increased from 5.01 to 29.94 percent. The average amount of sulphate adsorbed varied from 5.1 percent at a time interval of 2hrs to 29.94 percent a ranged from 8.13 percent to 29.33 percent at different intervals of time for 20 mg/kg added S. In case of 30mg/kg added S, the percentage of adsorbed sulphate was found to vary from 5.87 to 24.54 parameters 1/n and K values ranged from 0.397 to 0.739 and 1.012 to 1.400, respectively. The constants n and K, however are empirical constants in the Freundlich adsorption equation and do not provide the bas reactions.