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Item Rock phosphate fertilizers with special reference to Eppawala(Rubber Research Institute. Agalawatte, 1996) Dissanayake, D.M.A.P.; Perera, A.M.A.; Jayalath, A.Item Farmers perspectives. expectations and constraints faced by smallholder rubber farmers in Moneragala(Rubber Research Institute of Sri Lanka. Agalawatta, 2005) Dissanayake, D.M.A.P.; Wijesuriya, W.; Abeywardene, V.Item Use of a root bioassay method to determine phosphorus availability and uptake for some crop species(University of Ruhuna Faculty of Agriculture. Kamburupitiya, 2000) Dissanayake, D.M.A.P.; Atkinson, D; Edwards, A.C.Item Weed control in rubber plantations(Rubber Research Institute of Sri Lanka. Agalawatta, 1991) Yogaratnam, N.; Samarappuli, L.; Dissanayake, D.M.A.P.Item The status of smallholder rubber lands in the Moneragala district(Rubber Research Institute. Agalawatta, 2005) Wijesuriya, W.; Dissanayake, D.M.A.P.; Herath, K.; Edirisinghe, I.C.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 Reasons for abandoning rubber cultivation. a case study using Bayesian network(BN) approach(Rubber Research Institute. Agalawatte, 2004) wijesuriya, W.; Dissanayake, D.M.A.P.; Wijeratne, M.; Herath, K.; Edirisinghe, J.C.Item Smallholder rubber sector in the Moneragala district: Potentials and constraints(Rubber Research Institute of Sri Lanka. Agalawatta, 2005) Dissanayake, D.M.A.P.; Wijesuriya, W.; Edirisinghe, J.C.Item Clonal differences in rock phosphate utilization by Hevea(Rubber Research Institute. Agalawatta, 1991) Dissanayake, D.M.A.P.; Dissanayake, T.; Gunasekera, R.; Jayasekera, S.Genotypic variability in utilization of rock phosphates including the local source Eppawale was evaluated using Hevea clones during the early immature phase. All the clones responded to P fertilization, and the responces were related to the source of fertilizers and other soil characteristics. Plants of clone RR1C 121 utilized Eppawala rock phosphate efficiently, both in Matale and Boralu soil. But, plants of clone RR1C 110 were able to use both rock phosphate sources only in Matale soils. However, responce to rock phosphate from plants of 100 was comparatively low in relation to P uptake and dry matter production. The necessity of testing these clones for the locally available phosphate source in the field scale is also discussedItem Preference ranking as a participatory tool in identifying farmers' perceptions in planning effective dissemination programmes(Rubber Research Institute. Agalawatta, 2003) Wijesuriya, W.; Dissanayake, D.M.A.P.; Wijeratne, M.; Edirisinghe, J.; Herath, K.; Abeywardene, V.