Waidyanatha, U.P.De S.Goonasekera, G.A.J.P.R.2013-05-082013-05-081975Journal of the Rubber Research Institute of Sri Lanka52pp.10-19https://dl-rri.nsf.gov.lk/handle/1/1627AgricultureLeaf areaPunched disc methodPlanimetryPlant growthRubberHevea brasiliensisSome methods for determining leaf areas in HeveaA