Nugawela, A.Samarasekera, R.K.Wilbert, S.2013-05-082013-05-082002Journal of the Rubber Research Institute of Sri Lanka85pp.1-9https://dl-rri.nsf.gov.lk/handle/1/1453AgricultureHevea brasiliensisPlant girthRubber plantingBark thicknessTappingPlant growthThe effect of girth at opening on yield and growth of modern Hevea brasiliensis Muell Arg. clonesA