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Item Physiological responses for moisture stress and development of an index for screening coconut (Cocos nucifera L.) genotypes for drought tolerance(Faculty of Agriculture-University of Ruhuna. Kamburupitiya, 2006) Lakmini. W.G.D.; Nainanayake, N.P.A.D.; De Costa, W.A.J.M.Item Evaluation of different genotypes of tomato under well watered and water stressed conditions on the basis of yield and some selected physiological parameters(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2003) Weerasinghe, O.R.; De Costa, W.A.J.M.; Perera, A.L.T.Item Varietal variation in stmatal conductance, transpiration and photosynthesis of commercial sugarcane varieties under two con-trasting water regimes(University of Ruhuna. Matara, 2009) De Silva, A.L.C.; De Costa, W.A.J.M.Item Varietal variation in growth, physiology and yield of sugarcane under two contrasting water regimes(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2004) De Silva, A.L.C.; De Costa, W.A.J.M.Item Effects of shade and water stress on growth and related physiological parameters of the seedlings of five forest tree species(National Science Foundation:Colombo, 2000) De Costa, W.A.J.M.; Rozana, M.F.Item Estimation of water use of mature coconut (Cocos nucifera L.) cultivars (CRIC 60 and CRIC 65 ) grown in the low country intermediate zone using the compensation heat pulse method (CHPM)(National Science Foundation:Colombo, 2009-9) Madurapperuma, W.S.; De Costa, W.A.J.M.; Sangakkara, U.R.; Jayasekara, C.Item Relationship between stomatal conductance and leaf water potential in selected forest tree species growing under different levels of natural shade in the mid country wet zone(National Science Foundation:Colombo, 2000) De Costa, W.A.J.M.; Abeysinghe, W.A.M.W.K.S.B.; Chandrapala, A.G.Item A review of the possible impacts of climate change on forests in the humid tropics(NSF. Colombo, 2011) De Costa, W.A.J.M.Item The electromagnetic potential gradient, Ca2+ and starch-statoliths on the uneven growth of plants(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2010) Wanduragala, P.S.B.; Eeswara, J.P.; De Costa, W.A.J.M.Item A physiological investigation into the invasive behaviour of some plant species in a mid country forest reserve in Sri Lanka(National Science Foundation:Colombo, 2001) De Costa, W.A.J.M.; Hitinayake, H.M.G.S.B.; Dharmawardana, I.U.