Samarappuli, L.2012-07-312012-07-312001Bulletin of the Rubber Research Institute of Sri Lanka43pp.43-45https://dl.nsf.gov.lk/handle/1/9103AgricultureHevea brasiliensisFertilizer applicationSeed productionNitrogen manuringPotassium manuringFertilizer to fields designated for seed collection in HeveaArticle