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Item Manganese deficiency symptoms of tea(The Tea Research Institute. Talawakele, 1963) Tolhurst, J.A.H.Item Zinc deficiency of tea in Ceylon(The Tea Research Institute. Talawakele, 1962) Tolhurst, J.A.H.Item Manuring mature tea. the new T. 700 series; 1961(Tea Research Institute. Thalawakele, 1961) Tolhurst, J.A.H.Item A review of present ideas on hard pruning(The Tea Research Institute. Talawakele, 1963) Tolhurst, J.A.H.Item Economising on phosphate and potash for mature tea -1965(The Tea Research Institute. Talawakele, 1965) Tolhurst, J.A.H.Item A revised fertilizer mixture for nurseries- T55(The Tea Research Institute. Talawakele, 1965) Tolhurst, J.A.H.; Richards, A.V.Item A discussion on the relation between quality and manuring(Tea Research institute. Thalawakle, 1958) Tolhurst, J.A.H.Item A guide to the manuring of Ceylon tea (1995)(Tea Research Institute. Thalawakele, 1955) Lamb, J.; Portsmouth, G.B.; Tolhurst, J.A.H.Item Manuring young tea. 1961(Tea Research Institute. Thalawakele, 1961) Tolhurst, J.A.H.Item Dolomite(Tea Research Institute. Thalawakele, 1956) Tolhurst, J.A.H.