TRI Publications
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Item The current thinking on the substitution of urea for sulphate of ammonia in tea plantations(TRI:Talawakele, 1986) Wickremasinghe, K.N.Item 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.