Withana, A.K.Kumaragamage, D.2014-11-122014-11-121995Tropical Agricultural Research, 7:p.143-151https://dl.nsf.gov.lk/handle/1/12020Natural SciencesMineralSoil propertiesSoil nutrientsEvaluation of phosphorus extraction methods for assessing phosphorus availability of some Sri Lankan soilsA