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Item Influence of levels of nitrogen and potassium fertilizers on chlorophyll content in mature clonal tea leaves(Tea Research Institute. Talawakelle, 1986) Krishnapillai, S.; Ediriweera, V.L.Item Studies on tea and drought 1. some observations on drought effects on physiology of tea(Tea Research Institute. Talawakele, 1992) Krishnapillai, S.; Pallemulla, D.; Navaratne, S.Item Effect of cutting and defoliation on nitrogen uptake by young tea plants (Camellia sinensis L.) grown in sand culture(Tea Research Institute. Thalawakele, 1983) Krishnapillai, S.