Sri Lanka Journal of Tea Science

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Effect of urea and ammonium sulphate on the nitrification and the release of potassium , magnesium and calcium in acid tea soils
(Tea Research Institute. Talawakelle, 1985) Wickremasinghe, K.N.; Nalliah, P.; Wijedasa, M.A.
Effect of herbicides on urea hydrolysis in tea soils
(Tea Research Institute. Talawakele, 1986) Wimaladasa, G.D.; Wickremasinghe, K.N.
Fate of biuret in tea soils
(Tea Research Institute. Talawakele, 1988) Fernando, V.; Wickremasinghe, K.N.; Goonethilake, R.B.
Effect of urea and ammonium sulphate on sulphur nutrition of tea
(Tea Research Institute. Talawakelle, 1986) Wickremasinghe, K.N.; Ananthacumaraswamy, S.; Amarasekera, A.R.