4.Journals Published in Sri Lanka
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Item Activities of the Coconut Research Institute during 1979(Coconut Research Institute:Lunuwila, 1980) Pethiyagoda, U.Item Fertilizer applications in the nursery - a cautionary note(Tea Research Institute. Thalawakele, 1970) Pethiyagoda, U.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 Physiology as a key to rational tea husbandry(The Tea Research Institute. Talawakele, 1967) Pethiyagoda, U.Item The importance of the timing of pruning in relation to recovery(The Tea Research Institute. Talawakele, 1966) Pethiyagoda, U.Item The influence of 'lungs' on carbohydrate reserves and growth of shoots(The Tea Research Institute. Talawakele, 1965) Nagarajah, S.; Pethiyagoda, U.Item Some observations on the dormancy of the tea bush(The Tea Research Institute. Talawakele, 1964) Pethiyagoda, U.Item Factors affecting nitrification in tea soil and in stored solution(Tea Research Institute. Thalawakele, 1980) Krishnapillai, S.; Pethiyagoda, U.Item Effect of four commercial preparations of Bacillus thuringiensis on Opisina arenosella Walker(Coconut Research Institute. Lunuwila, 1983) Kanagaratnam, P.; Pethiyagoda, U.; Velu, M.S.