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Item Determination of optimum nitrogen concentrations in hydroponics for tomato grown in coir medium in tropical greenhouse(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2019-11) Erabadupitiya, H.R.U.T.; Weerakkody, W.A.P.; Nandasena, K.A.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 Applicability of straight fertilizers and compost in greenhouse tomato cultivation(Faculty of Agriculture, Unviersity of Peradeniya:Peradeniya, 2008) Hearth, H.M.N.K.; Suriyagoda, L.D.B.; Amarasiri, K.E.S.N.; Premaratne, K.P.; Weerakkody, W.A.P.