2.NSF Publications
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Item 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 requestingItem Nitrogen use and economics of intercropping in Sri Lanka(National Science Council:Colombo, 1981) Gunasena, H.P.M.