Sulphate sorption-desorption characteristics of two inceptisols and an alfisol of Jharkhand.

摘要

Three soil series of Bokaro district in Jharkhand having gradients in physical and chemical properties were studied to relate sulphate sorption and desorption to soil factors. Sorption isotherms were described by the Langmuir and the Freundlich equation. The sorption capacity of soils varied widely and followed the order: Chalkari > Khaira > Petabar. The fraction of added sulphate sorbed followed the same trend of amounts of sulphate extracted by KH₂PO₄ (500 mg PL-1) as well as Freundlich constant K' measures the strength of sorption and inverse relation of desorbed relative to the sorbed percent as well as maximum recovery percent but not the sulphate affinity constant, maximum sulphate buffering capacity (K. S_max) estimated by the Langmuir isotherm. Regression equations were developed among the sorption parameters of S and soil factor.