Nugawela, A.Peries, M.R.C.Wijesekera, S.Wilbert, S.2014-07-102014-07-101998Bulletin of the Rubber Research Institute of Sri Lanka, 38:p.53-59https://dl-rri.nsf.gov.lk//handle/1/2446AgricultureProductivityTapping systemsCan D/3 frequency tapping minimize problems related to tapper shortageArticle