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Item Nitrogen fixation in rice fields(2005) Kulasooriya, S.A.Item Cyanobacteria and Azolla as biofertilizer for rice(Oxford and IBH Publ.:New Delhi and Calcutta, 1996) Kulasooriya, S.A.Item Emergence of Diverse Microbes on Application of Biofilmed Biofertilizers to a Maize Growing Soil(University of Peradeniya:Peradeniya, 2013) Buddhika, U.V.A.; Athauda, A.R.W.P.K.; Seneviratne, G.; Kulasooriya, S.A.; Abayasekara ,C.L.Item Nitrogen fixation in some rice soils in Sri Lanka(Oxford University Press, 1987) Granhall, U.; Kulasooriya, S.A.; Hirimburegama, W.K.; De Silva, R.S.Y.; Lindberg, T.