4.Journals Published in Sri Lanka
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Item Rubber plantations as self-sustaining agroforestry systems(Sri Lanka Forest Department:Battaramulla, 1995) Samarappuli, L.; Yogaratnam, N.Item Fertilizer use in rubber(Soil Science Society of Sri Lanka:Peradeniya, 1985-86) Yogaratnam, N.Item The use of Eppawela phosphate in the platation sector: agronomic aspects(1988) Yogaratnam, N.Item Fertilizer responses in low-grown clonal tea(The Tea Research Institute. Talawakele, 1969) Fernando, L.H.; Bandaranayake, J.I.H.; Yogaratnam, N.Item Future trends and policies in soil-plant studies(Rubber Research Institute of Sri Lanka. Agalawatta, 1993) Yogaratnam, N.Item Processing of NR and some developments in rubber chemistry and technology in Sri Lanka(Rubber Research Institute of Sri Lanka. Agalawatta, 1998) Yogaratnam, N.; Tillekeratne, L.M.K.; De Silva, K.G.K.; Siriwardena, S.; Samarappuli, I.N.Item Developments in rubber research(Rubber Research Institute of Sri Lanka. Agalawatta, 1992) Yogaratnam, N.Item Adaptive research for rubber small holders(Rubber Research Institute of Sri Lanka. Agalawatta, 1991) Yogaratnam, N.Item Weed control in rubber plantations(Rubber Research Institute of Sri Lanka. Agalawatta, 1991) Yogaratnam, N.; Samarappuli, L.; Dissanayake, D.M.A.P.Item Use of organic materials as fertilizers(Rubber Research Institute of Sri Lanka. Agalawatte, 1987) Yogaratnam, N.