摘要 : A laboratory experiment was conducted at College of Horticulture, Mudigere, UAS, Bangalore by collecting soil samples from four districts of hilly zone soils of Karnataka under paddy land use cover to elucidate information on quan... 展开 A laboratory experiment was conducted at College of Horticulture, Mudigere, UAS, Bangalore by collecting soil samples from four districts of hilly zone soils of Karnataka under paddy land use cover to elucidate information on quantity and intensify parameters for understanding potassium dynamics in the soils. The results showed that equilibrium activity ratio of potassium (ARe^K) in soils ranged from 1.98 to 6.21x10^-3 (M/L)^0.5, and ARe^K values positively and significantly correlated with Q/I parameters like K_L, K_X and K_O. Potential buffering capacity values (PBC^K) of soils ranged from 32.55 to 98.38 Cmol (P⁺)/kg. PBC^K values significantly correlated with exchangeable K and non-exchangeable K in soils. The free energy change (- Delta G degrees ) values indicated that soils had optimum amount of potassium. The studies on Q/I parameters indicated that soils had relatively higher K supplying power (PBC^K) and enough readily available K. 收起