4.Journals Published in Sri Lanka
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Item Studies on the mineral nutrition of tea 4 - ammonium and nitrate as forms of nitrogen for tea plants in sand culture(Tea Research Institute. Thalawakele, 1971) Pethiyagoda, U.; Krishnapillai, S.Item Current trends in physiological enquir(1967) Pethiyagoda, U.Item Studies on the mineral,nutrition of tea 2: experimentally induced .major nutrient deficiency symptoms(1970) Pethiyagoda, U.; Krishnapillai, S.Item Studies on the mineral nutrition of tea - 4 ammonium and nitrate as forms of nitrogen fro tea plants in sand culture(The Tea Research Institute. Talawakele, 1971) Pethiyagoda, U.; Krishnapillai, S.Item Physiology as a key to rational tea husbandry(The Tea Research Institute. Talawakele, 1967) Pethiyagoda, U.