Staff Publications
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Item Effect of recovery tapping on yield potential of rubber (Hevea brasiliensis) trees(Rubber Research Institute:Agalawatta, 2001) Silva, T.U.K.; Nugawela, A.; Rodrigo, V.H.L.; Serasinghe, P.Item Rubber cum sugarcane intercropping. a sustainable cropping system for farmers in the intermediate zone of Sri Lanka(Rubber Research Institute:Agalawatta, 2000) Rodrigo, V.H.L.; Nugawela, A.; Sivanathan, A.; Witharama, W.R.G.; Jayasinghe, W.K.Item Agronomic and economic benefits of high density banana intercropping during the immature period of rubber with particular emphasis on smallholders(Rubber Research Institute:Agalawatta, 2000) Rodrigo, V.H.L.; Stirling, C.M.; Samarasekera, R.K.; Kariyawasam, L.S.; Pathirana, P.D.Item Field performance of young coffee seedlings and cuttings intercropped with rubber(Rubber Research Institute:Agalawatta, 1988) Rodrigo, V.H.L.; Nugawela, A.; Kariyawasam, L.S.; Aluthhewage, R.K.Coffee may be planted either using seedlings or cuttings. Anyhow, a comparative study of their field establishment and performance has not been made. Iin this study seedlings and cuttings of Coffea canephora intercropped with rubber were compared for their field stablishment and growth. It is evident that there is no difference in the success of their field establishment. The dry matter yield determinants of plants, i. e. light intercept ion, conversion efficiency and rate of loss of dry matter, estimated by total leaf area, CO2 assimilation rate and dark respiratory rate respectively, are also similar in both seedlings and cuttings. This is confirmed by the similar mean total dry weight of a seedlings and a cuttings. The partitioning of assimilates is more towards root development in the cuttings and is evident by the significantly high root dry weight and the root/shoot ratio. The percentage of assimilates partitioning towards the growth of aerial parts is less in the cuttings, i. e. 52 and 67perc. for cuttings and seedlings respectively. Despite of similar light levels, the CO2 assimilation rates are lower in the afternoon in both seedlings and cuttings. The perc. deeline is 23.5 and 18.6perc. for seedlings and cuttings respectively.Item An economic evaluation of the use of rainguards(Rubber Research Institute:Agalawatta, 1993) Rodrigo, V.H.L.; Herath, P.H.M.U.; Nugawela, A.Use of rainguards can minimize the loss of tappping days and hence the loss in rubber crop. A simple model was developed to study different components determinig the profitability of using rainguard is discussed. Price of rubber, yield potential of a plant and tapping wage rate were identified as most important factors which determine the worthiness of the use of rainguards. Sealent price is also a major factor in deciding profitability. If the price of scalent is less than Rs. 20/= per kg, the profilability from both the apron and the gutter types is sameItem Is shade important in rubber based cropping systems? Part 2.: photosynthetic performance of rubber and banana under natural shade(Rubber Research Institute of Sri Lanka:Agalawatta, 2002) Senevirathna, A.M.W.K.; Stirling, C.M.; Rodrigo, V.H.L.; Karunathilake, P.K.W.; Pathirana, P.D.Item Adoption of different tapping systems in the rubber industry of Sri Lanka with special reference to low frequency tapping(Rubber Research Institute:Agalawatta, 2007) Rodrigo, V.H.L.Item Planting rubber in Eastern province of Sri Lanka:potential for carbon trading under clean development mechanism(Rubber Research Institute:Agalawatta, 2010) Iqbal, S.M.M.; Rodrigo, V.H.L.; Munasinghe, E.S.Item Rubber reaches East. hand in hand with regaining Sri Lanka(Rubber Research Institute of Sri Lanka:Agalawatta, 2009) Rodrigo, V.H.L.; Iqbal, S.M.M.Item Beyond the latex. entry of rubber tree into the carbon market after 100 years of research and development in Sri Lanka(Rubber Research Institute of Sri Lanka:Agalawatta, 2009) Munasinghe, E.S.; Rodrigo, V.H.L.