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Evaluation of herbicides for rain-fed upland rice, Oryza sativa L.
(National Science Council:Colombo, 1974) Gunasena, H.P.M.; Kannangara, H.W.
Abstract available from Library, Please quote title when requesting
Effect of spacing and nitrogen on growth and yield of manioc, Manihot esculenta Crantz growth as an intercrop under coconut
(National Science Council:Colombo, 1980) Gunasena, H.P.M.; De Silva, N.T.M.H.; Martin, M.P.L.D.
Nitrogen use and economics of intercropping in Sri Lanka
(National Science Council:Colombo, 1981) Gunasena, H.P.M.