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Zinc deficiency of tea in Ceylon
(The Tea Research Institute. Talawakele, 1962) Tolhurst, J.A.H.
Frequency of application of fertilizer
(The Tea Research Institute. Talawakele, 1966) Tolhurst, J.A.H.
Alternate versus double -row application of fertilizer
(The Tea Research Institute. Talawakele, 1966) Tolhurst, J.A.H.
Economising on phosphate and potash for mature tea -1965
(The Tea Research Institute. Talawakele, 1965) Tolhurst, J.A.H.
A revised fertilizer mixture for nurseries- T55
(The Tea Research Institute. Talawakele, 1965) Tolhurst, J.A.H.; Richards, A.V.