Somasiri, L.L.W.Edwards, A.C.2014-06-032014-06-031992Communications in soil science and plant analysis, 27(7-8):p.645-657https://dl-cri.nsf.gov.lk//handle/1/3471SoilsSoil analysisNutrientExtractionAnalytical techniquesIon exchange resinsAn ion exchange resin method for nutrient extraction on agricultural advisory soil samples