Life Sciences Commons^™

Potassium Exchange Isotherms As A Plant Availability Index In Selected Calcareous Soils Of Western Azarbaijan Province, Iran, Abbas Samadi

Turkish Journal of Agriculture and Forestry

Potassium (K) exchange isotherms (quantity-intensity technique, Q/I) and K values derived from the Q-I relationship provide information about soil K availability. This investigation was conducted to study the relationships among K Q/I parameters, available K extracted by 1 N NH_4AOc (exchangeable K plus solution K), potassium saturation percentage (K-index, %), and the properties of 6 different calcareous agricultural soils. In addition, the relationship of tomato plant yield response to the K requirement test based on K exchange isotherms was investigated. The Q/I parameters included readily exchangeable K (\DeltaK^0), specific K sites (K_X), linear potential buffering capacity (PBC^K), and energy of …