Tropical Agricultural Research
Permanent URI for this collectionhttps://dl.nsf.gov.lk/handle/1/11652
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Item Nitrogen leaching losses and plant response to nitrogen fertilizers as influenced by application of neem (Azadirachta indica A. juss) materials(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1999) Gnanavelrajah, N.; Kumaragamage, D.Item Adsorption of paraquat in selected Sri Lankan soils(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1996) Ratnayake, J.I.L.B.; Kumaragamage, D.Item Use of multi-ionic extractant to determine available P,K,Na,Ca and Mg in acid soils of Sri Lanka(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1995) Madurapperuma, W.S.; Kumaragamage, D.Item Evaluation of phosphorus extraction methods for assessing phosphorus availability of some Sri Lankan soils(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1995) Withana, A.K.; Kumaragamage, D.Item Fate of Diuron in selected Agricultural soils(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1998) Ratnayake, J.I.L.B.; Kumaragamage, D.Item Effect of neem (Azadirachta indica A. Juss) materials on nitrification of applied urea in three selected soils of Sri Lanka(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1998) Gnanaveirajah, N.; Kumaragamage, D.Item Comparison of selectively mined apatite crystals and commercially available rock phosphate from Eppawala, as P fertilizers for flooded rice(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1994) Ratnayake, M.P.K.; Kumaragamage, D.; Dahanayake, K.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 A comparison of citric acid solubilities of commercially available Eppawala rock phosphate and selectively mined primary apatite crystals after mixing with peat(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1993) Rathnayake, M.P.K.; Kumaragamage, D.; Dahanayake, K.Item Retention of phosphorus by some surface soils of Sri Lanka(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1993) Withana, A.K.; Kumaragamage, D.