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Item Chinese experience in bio-gas use(People's Bank. Colombo, 2008) Samarasinghe, L.M.Item Annual report for 1976(Coconut Research Institute:Lunuwila, 1977)Item Comparison of local and foreign agronomic practices on the performance of groundnut (Arachis hypogaea L.)(Faculty of Agriculture, Eastern University . Chenkalady, 2007) Thedchenamoorthy, K.Item Potash salts. their production and use(Coconut Research Scheme(Ceylon):Lunuwila, 1951) Piekenbrock, P.Item Effect of combined nitrogen on growth and nodule function or Pueraria phaseoloides(Rubber Research Institute. Agalawatta, 1991) Jayasinghe, C.K.; Wettasinghe, D.S.Nodulation and nitrogen fixation rates of most of the legumes are reported to be severely affected when they are grown in soils high in available nitrogen. Furthermore, this phenomenon may become more critical when legumes are grown in multiple cropping systems like Pueraria phaseoloides in rubber plantatons where ono legume counterpart is fertilized with nitrogenous fertilizer. Results of experiments conducted in seeding agar to find the effect of nitrogen on growth and nodule function of P. phaseoloides showed that nodulation of P. phaphaeoloides was inhibited at a concentration between 24.4 and 44.8 ppm nitrogenItem Fertilizer management in alfisols of Sri Lanka(Soil Science Society of Sri Lanka:Peradeniya, 1987-88) Handawela, J.Item Role of rock phosphates in the nutrition of immature and mature Hevea(Rubber Research Institute. Agalawatta, 1994) Dissanayake, D.M.A.P. othersCommercially available Eppawela rock phosphate (ERP) was evaluated as a source of P for young rubber plants throughout the period of immaturity. The effects of rock phosphate on yield nutrient composition of leaves soil were also studied on mature rubber.The efficiency of ERP in relation to growth of young plants was similar to that of Imported Rock Phosphate (IRP) Triple Super Phosphate (TSP) when used in soils with a P status less than 37.00 Kg of soils with a soil pH range of 3.6 to 4.2. In these situations it appears that the currently recommended rate of P is unlikely to be sufficient to meet the plant P demand.It is therefore possible to use ERP as a source of P for immature rubber plants growing in areas which are considered low in P for rubber.In contrast, application of rock phosphates did not influence the productivity of the mature rubber tree.plants were able to maintain adequate levels of P in leaves even under no P fertilizer conditions suggesting the effect of residual P in soil that received IRP during the immature phase.Item Fertilizer nitrogen utilization by tea(TRI:Talawakele, 1981) Wickremasinghe, K.N.Item Effects of nitrogen on yield attributes of high yield variety aus rice(NARESA:Colombo, 1997) Islam, M.T. and othersItem Environmental friendly disease control systems(Rubber Research Institute of Sri Lanka. Agalawatta, 1998) Jayasuriya, K.E.