The study dealt with the principal characteristics; supply potenti-ality,quantity and intensity;and buffer capacity(ratio of quantity to intensity)of potassium of major tobacco soils developed from differment parent materials in Hunan province.Taking three parameters (-△K~o,ARe~k and PBC) of Q/I curve as the reference items, the paper analysed the correlation of certain character-sistics and potassium content in soils The results showed that -△K~o and exchangeable potassium, ARe~k and easy exchangeable potassium, pBC~k and pH, PBC~k and ctc w...
