Importance of pools varies with nutrients Potassium(K) Inorganic pools in soil and plants Crystal-lattice K, 10-10,000kg/ha Soil solution: cation(K+),0.05-2mM; soluble EXchange K+, 10-500kg/ha Atmospheric pool negligible◼ Potassium (K) ◼ Inorganic pools in soil and plants ◼ Crystal-lattice K, 10-10,000kg/ha ◼ Soil solution: cation (K+), 0.05-2mM; soluble ◼ Exchange K+, 10-500kg/ha ◼ Atmospheric pool negligible Importance of pools varies with nutrients