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Item Rocks and minerals(NARESA:Colombo; 82p, 1986) Kumaragamage, D.; Thenabadu, M.W.Item Fertilizer for rice(Central Agricultural Research Institute:Peradeniya, 1970) Thenabadu, M.W.Item Effect of Ammonium Nitrogen on Potassium reserves in an alfisol at different K levels under submerged condition(1990) Liyanage, N.J.; Jayakody, A.N.; Thenabadu, M.W.Item Changes of potassium reserves in an alfisol under irrigated paddy at different potassium and nitrogen levels(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1989) Liyanage, N.J.; Keerthisinghe, G.; Jayakody, A.N.; Thenabadu, M.W.Item Humified phenol-rich plant residues and soil urease activity(Tea Research Institute. Thalawakele, 1983) Sivapalan, K.; Fernando, V.; Thenabadu, M.W.Item Urease activity in soils:a review(National Science Council of Sri Lanka:Colombo, 1996) Dharmakeerthi, R.S.; Thenabadu, M.W.Item Soil and soil conservation in Sri Lanka(NARESA:Colombo; 113p, 1988) Thenabadu, M.W.Item An investigation on phosphate adsorption in six Sri Lankan soils in relation to their chemical and mineralogical properties(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1991) Jayawickrama, S.P.; Thenabadu, M.W.; Kumaragamage, D.Item Use of fertilizers and manures in Sri Lanka(NARESA:Colombo; 42p, 1980) Thenabadu, M.W.Item Mobility of potassium reserves in an alfisol under irrigated paddy at different potassium and nitrogen levels(1989) Liyanage, N.J.; Keerthisinghe, G.; Jayakody, A.N.; Thenabadu, M.W.