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Item Profit efficiency of smallholder rubber farmers in Kegalle, Kalutara and Ratnapura districts(Rubber Research Institute. Agalawatta, 2010) Edirisinghe, J.; Wijesuriya, W.; Bogahawatte, C.Item Use of grass root level information for effective policy making and extension planning. experiences from the smallholder rubber sector(Rubber Research Institute of Sri Lanka. Agalawatta, 2009) Wijesuriya, W.; Dissanayake, A.