Local literature
Permanent URI for this collectionhttps://dl.nsf.gov.lk/handle/1/25261
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Item Biofertilizers and their application(Eastern University:Chenkalady, 1999) Bagyaraj, D.J.; Suvarna, C.V.Item Deep placement:a method of nitrogen fertilizer application compatible with algal nitrogen fixation in wetland rice soils(1980) Roger, P.A.; Kulasooriya, S.A.; Tirol, A.C.; Craswell, E.T.Item Azolla as a biofertilizer for rice in Sri Lanka(Martiness Nijhoff and W. Junk Publishers:Leiden, 1984) Kulasooriya, S.A.; Hirimburegama, W.K.; Abeysekera, S.W.Item Survival and effect of Azorhizobium caulinodans on rice roots(1993) Van Holm, L.H.J.; Van Nieuwenhove , C.; Kumari, I.A.D.C.T.; Kulasooriya, S.A.; Vlassak, K.Item Cyanobacteria and Azolla as biofertilizer for rice(Oxford and IBH Publ.:New Delhi and Calcutta, 1996) Kulasooriya, S.A.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.