Journal of the Rubber Research Institute of Sri Lanka
Permanent URI for this collectionhttps://dl.nsf.gov.lk/handle/1/8676
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Item Impact of production consumption, exports and stocks on the price of natural rubber in Sri Lanka(Rubber Research Institute. Agalawatta, 1997) Wijesuriya, B.W.; Thattil, R.O.The relationship between price of Natural Rubber (NR)with factors such as:production,consumption,exports and stocks are important in identifying the nature of competetion and therefore reveals the market structure for NR.This paper examines these relationships and also the seasonal variation of these factors,using time series statistical tools,viz Cross Correlation Functions (CCF)and seasonal indices. There is a marked seasonality in production with values below average during April to October (2nd and 3rd quarters).Prices tend to fall when the production rises.A similar phenomenon was observed between price and exports.However,the effect of production or exports on price is mild. A similar pattern of seasonal variation was observed for consumption and stocks of NR.More rubber is consumed during the latter part of the year.An accumulation of stocks was observed towards the end of the year.However,price of NR was not significantly related to consumption or stocks.This is mainly due to the fact that only a few buyers influence prices through their purchase and by adjustments of stocks as in an oligopolistic market.Item Economics of interplanting rubber with tea in the low country wet zone(Rubber Research Institute of Sri Lanka. Agalawatte, 1995) Yogaratnam, N.; Samarappuli, I.N.; Iqbal, S.M.M.This study examines the economic viability of interplanting rubber with tea in the low country wet zone, where cultivation of both these crops is agronomically feasible. In the analysis, apart from Net Present Value(NPV), other measurments of project worth have also been used to determine the return on investment. Economic lifespan of a 25 years is considered for discounted cash flow analysis. The results reveal the profitability of this intergrated farm activity, which generates a NPV of nearly RS 162,000 at 15 per cent discount rate. The B/C ratio, net benefit investment ratio and IRR are 1.24, 3.73 and 31 per cent respectively. The pay back period of 5 years also emphasizes the economic feasibility of the investment. Sensitivity analysis on certain parameters have been done to ascertain the economic viability. The conclusion is that commencement of interplanting rubber with tea in the law country wet zone, atleast on a limited scale is economically desirable.Item Socio economic aspects of group processing of smallholder's latex in Sri Lanka(Rubber Research Institute. Agalawatta, 1978) Chandrasiri, G.R.; Gunasekara, H.D.B.H.; Weerasinghe, S.L.Item The technical and economic interface of synthetic and natural rubbers(Rubber Research Institute. Agalawatta, 1977) Duck, E.W.Item The economics of rubber replanting cycles. an interpretive essay(Rubber Research Institute. Agalawatta, 1977) Etherington, D.M.; Jayasuriya, S.K.W.Item Some extension and training aspects of rubber smallholders in Malaysia(Rubber Research Institute. Agalawatta, 1977) Abdullah, R.B.Item Country plans and programmes for rubber development and FAO assistance(Rubber Research Institute. Agalawatta, 1977) Gunawardena, K.J.Item Decision making in smallholding rubber. attitudes to replanting in Sri Lanka(Rubber Research Institute. Agalawatta, 1977) Jayasuriya, S.K.W.; Carrad, B.