Abstract:In present experiment the desorption of adsorbed ammonium by soils and clay minerals from ammonium chloride and ammonium acetate solutions of various concentrations and at different pH values were studied in detail. The samples used include a lateritic red soil (SiO2/R2O3 of clay 1.05), a red soil (SiO2/R203 1.63), a podsolized yellow soil (SiO2/R203 1.59), a betonitic clay and a kaolinitic clay.