7.Bio Farming
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Item Organic tea cultivation(Tea Research Institute:Thalawakele, 1999) Gaffar, N.M.A.Item Organic tea cultivation(Tea Research Institute:Thalawakele, 1999) Gaffar, N.M.A.Item Effect of organic and chemical fertilizers on vegetable cultivation in upcountry intermediate zone(Department of Agriculture:Peradeniya, 1993) Wijewardena, J.D.H.Item Selected notes on the manuring of tea(1982) Eden, T.