EVALUATION OF ORGANIC MATERIALS FOR THE IMPROVEMENT OF SOIL FERTILITY IN RUBBER CULTIVATION
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university of Sri Jayewardenepura, Gangodawila, Nugegoda
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R.P.HETTIARACHCFII, (2002), "EVALUATION OF ORGANIC MATERIALS FOR THE IMPROVEMENT OF SOIL FERTILITY IN RUBBER CULTIVATION", university of Sri Jayewardenepura, Gangodawila, Nugegoda