7.Bio Farming
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Item Compost(Tea Research institute, 1951) Haworth, F.Item Compost manufacture and use on tea estates(Tea Research Institute:Talawakelle, 1935) Eden, T.Item Use of domestic refuse and sewage sludge profitably in the manufacture of compost(Institution of Engineers:Colombo, 1974) Ranasinghe, U.Item Use of domestic refuse and sewage sludge profitably in the manufacture of compost(Institution of Engineers:Colombo, 1974) Ranasinghe, U.Item Compost and disease(Research institute:Thalawakle, 1937) Gadd, C.H.