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Item Estimation of Nitrate and phosphate leaching from lysimeter simulation of rice straw landfill bioreactor and evaluation of fertilizer quality of resulting compost(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2011) Gamage, D.A.S.; Wijesekara, S.S.R.M.D.H.R.; Sarathchandra, G.W.N.L.; Basnayake, B.F.A.; Costa, W.A.J.M.Item Effects of water stress on water use efficiency of different varieties of common bean (Phaseolus vulgaris L.)(NARESA:Colombo, 1996) Costa, W.A.J.M.; Ariyawansa, B.D.S.K.Item Estimation of Nitrate and phosphate leaching from lysimeter simulation of rice straw landfill bioreactor and evaluation of fertilizer quality of resulting compost(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2011) Gamage, D.A.S.; Wijesekara, S.S.R.M.D.H.R.; Sarathchandra, G.W.N.L.; Basnayake, B.F.A.; Costa, W.A.J.M.