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Item Some issues related to sustainability in the smallholder rubber sector(Rubber Research Institute . Agalawatta, 2007) Wijesuriya, W.; Dissanayake, D.M.A.P.; Herath, K.; Edirisinghe, J.; Abeywardene, V.Item Methods of data analysis for intercropping systems under rubber(Rubber Research Institute. Agalawatta, 2001) Wijesuriya, W.; Thattil, R.O.Item A new systematic experimental design for tree crop research(Rubber Research Institute of Sri Lanka. Agalawatta, 2006) Pathiratna, L.S.S.; Wijesuriya, W.Item Level of awareness on recommended practices in rubber small holdings in the Moneragala district(Rubber Research Institute of Sri Lanka. Agalawatta, 2005) Wijesuriya, W.; Dharmadasa, M.; Rathnayaka, K.; Abeydissanayake, D.R.A.M.G.; Chandrasiri, J.A.S.