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Item Competition between six hedgerow tree species and mung bean(vigna radiata(L)wilczek)in the mid-country intermediate zone(National Science Foundation:Colombo, 2000) De costa, W.A.J.M.; Chandrapala, A.G.Item Effects of tree root competition on availability of soil and plant nutrients,soil water and light interception in hedgerow intercrops with different tree species in the mid-country intermediate zone(National Science Foundation:Colombo, 2000) De costa, W.A.J.M.; Chandrapala, A.G.Item Evaluation of different organic manures on soil properties, growth and yield of rice and maize under rice/maize crop rotation(Department of Agriculture:Peradeniya, 2005) De Silva, S.H.S.A.; Chandrapala, A.G.; Jayalath, H.A.P.