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Item Circulation culture of tomato for efficient nutrient uptake and high yield in tropical greenhouses(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2012) Mawalagedera, S.M.M.R.; Weerakkody, W.A.P.; Premaratne, K.P.Item Effect of electrical conductivity (EC) of the nutrient solution on nutrient uptake , growth and yield of leaf lettuce (Lactuca sativa L.) in stationary culture(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2006) Samarakoon, U.C.; Weerasinghe, P.A.; Weerakkody, W.A.P.Item Plant nutrient uptake in recirculation culture of tomato under growth stage based electrical conductivity adjustments(National Science Foundation. Colombo, 2011) Weerakkody, W.A.P.; Wakui, K.; Nukaya, A.Item Development of a low cost and productive nutrient formulation for simplified hydroponics using commercial grade chemicals(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2008) Saparamadu, M.D.J.S.; Weerakkody, W.A.P.; Gunawardhana, H.D.; Wijesekera, R.D.