Browsing by Author "Rodrigo, V.H.L."
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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 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 Can rubber (Hevea brasiliensis Muell. Arg.) be grown as a timber crop?(Rubber Research Institute of Sri Lanka. Agalawatta, 2006) Munasinghe, E.S.; Rodrigo, V.H.L.Item Construction of a low cost instrument for crop radiation use studies in Sri Lanka(Rubber Research Institute of Sri Lanka. Agalawatta, 2002) Rodrigo, V.H.L.; Munasinghe, C.R.; Stirling, C.M.Item Development of rubber based farming systems in Sri Lanka(Rubber Research Institute of Sri Lanka. Agalawatta, 2009) Rodrigo, V.H.L.; Balasooriya, B.M.D.C.Item Early growth of rubber in the dry zone of Sri Lanka: an investigation in Vavuniya district(Rubber Research Institute:Agalawatta, 2016) Iqbal, S.M.M.; Rodrigo, V.H.L.; Munasinghe, E.S.; Balasooriya, B.M.D.C.; Kudaligama, K.V.V.S.; Jayathilake, P.M.M.; Randunu, R.P.S.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 Effect of different light regimes on above and below ground development of Hevea brasiliensis during early stage of growth(Rubber Research Institute. Agalawatta, 2009) Senevirathna, A.M.W.K.; Karunatillake, P.K.W.; Pathirana, P.D.; Rodrigo, V.H.L.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 Effectiveness of a locally developed ethephon formulation on yield and related latex physiological factors of Hevea brasiliensis(Rubber Research Institute:Agalawatta, 2017) Fernando, L.T.B.K.; Kudaligama, K.V.V.S.; Fernando, T.H.P.S.; Lakmini, W.G.D.; Somasiri, H.P.P.S.; Karunarathne, N.P.S.N.; Fernando, K.M.E.P.; Attanayaka, A.P.; Rodrigo, V.H.L.; Seneviratne, P.Item Effectiveness of commercially available selected water-based and oil-based ethephon formulations as a yield stimulant of rubber (Hevea brasiliensis)(Rubber Research Institute:Agalawatta, 2017) Karunarathne, N.P.S.N.; Fernando, L.T.B.K.; Kudaligama, K.V.V.S.; Lakmini, W.G.D.; Abewardhana, N.N.; Madushani, P.D.T.L.; Perera, M.K.P.; Seneviratne, P.; Rodrigo, V.H.L.Item Effectiveness of low frequency harvesting systems in rubber smallholder sector of Eastern province (IL2) of Sri Lanka(Rubber Research Institute:Agalawatta, 2016) Lakshman, R.G.N.; Kudaligama, K.V.V.S.; Rodrigo, V.H.L.; Nugawela, A.; Attanayake, A.P.; Perera, M.K.P.; Madushani, P.D.T.L.Item Feasibility of rubber (Hevea brasiliensis Muell.Arg.) cultivation in Eastern province of Sri Lanka with the peasant community(Rubber Research Institute. Agalawatta, 2010) Iqbal, S.M.M.; Rodrigo, V.H.L.; Karunathilake, P.K.W.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 Ground level impediments for proper adoption of rubber cultivation in Northern Province of Sri Lanka(Rubber Research Institute:Agalawatta, 2017) Premarathna, G.N.S.; Munasinghe, E.S.; Rodrigo, V.H.L.; Ginigaddara, G.A.S.; Bandara, A.M.K.R.Item High density banana/rubber intercrops have no negative effects component crops under the smallholder conditions(Rubber Research Institute. Agalawatta, 2010) Senevirathna, A.M.W.K.; Striling, C.M.; Rodrigo, V.H.L.; Pathirana, P.D.; Karunathilake, P.K.W.Item Intercropping- a way to maximize the land productivity and to obtain economic stability(Rubber Research Institute. Agalawatte, 2004) Rodrigo, V.H.L.; Iqbal, S.M.M.; Pathirana, L.S.S.Item Is shade important in rubber based cropping systems? part 1: effect of shade on growth dry matter partitioning and adaptation of rubber and banana(Rubber Research Institute of Sri Lanka. Agalawatte, 2002) Senevirathna, A.M.W.K.; Stirling, C.M.; Rodrigo, V.H.L.; Karunathilake, P.K.W.; Pathirana, P.D.Item Is shade important in rubber based cropping systems? Part 2.: photosynthetic performance of rubber and banana under natural shade(Rubber Research Institute. Agalawatta, 2002) Senevirathna, A.M.W.K.; Stirling, C.M.; Rodrigo, V.H.L.; Karunathilake, P.K.W.; Pathirana, P.D.Item The journey of latex exploitation in the rubber tree(Rubber Research Institute of Sri Lanka. Agalawatta, 2009) Rodrigo, V.H.L.; Balasooriya, B.M.D.C.