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Item Studies on cereal-legume intercrop systems(National Science Council:Colombo, 1979) Gunasena, H.P.N.; Sangakkara, R.; Wickramasinghe, P.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 of Sri Lanka, 2000-06) De costa, W.A.J.M.; Chandrapala, A.G.Item Root penetration and activity patterns of some upland crops grown on reddish brown earth soils(Sri Lanka Soil Science Society of Sri Lanka:Peradeniya, 1991) Nayakekorala, H.B.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 Competition between six hedgerow tree species and mung bean(vigna radiata(L)wilczek)in the mid-country intermediate zone(National Science Foundation of Sri Lanka, 2000-06) De costa, W.A.J.M.; Chandrapala, A.G.