Perera, K.T.M.S.2021-06-092021-06-092000https://dl-ifs.nsf.gov.lk/handle/1/1995xiii,117p.:ill, tableAgricultureEvaluation of the mixed ion exchange resin method for the simultaneous extraction of available Potassium Magnesium and other cationic plant nutrientsThesisUniversity of PeradeniyaMPhil