Samarappuli, L.Edirimanna, V.Thevarapperuma, A.2012-07-312012-07-312004Bulletin of the Rubber Research Institute of Sri Lanka45pp.27-311391-0051https://dl.nsf.gov.lk/handle/1/9135AgricultureSoil testingSoil typesSoil classificationRubber growing soilPotassium distributionFertilizer applicationPotassium. its status in rubber growing soil of Sri LankaArticle