Madurapperuma, W.S.Kumaragamage, D.2014-06-032014-06-031995Tropical Agricultural Research, Sri Lanka, 7:p.152-158https://dl-cri.nsf.gov.lk//handle/1/3748Soils and Plant NutritionMulti ionic extractantNutrientsAcid soilsUse of a multi-ionic extractant to determine available P, K, Na, Ca and Mg in acid soils of Sri Lanka