Somasiri, L.L.W.Edwards, A.C.2014-06-032014-06-031992Chemistry in Sri Lanka, 9:p.18https://dl-cri.nsf.gov.lk//handle/1/3472SoilsSoil analysisNutrientExtractionAnalytical techniquesPlant nutritionIon exchange resinsLeaf nutrient statusUse of ion exchange resins for extraction and estimation of plantnutrients in coconut growing acid lateritic soils.