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Now showing items 1-6 of 6

Nitrogen fixation in some rice soils in Sri Lanka

Granhall, U.; Kulasooriya, S.A.; Hirimburegama, W.K.; De Silva, R.S.Y.; Lindberg, T. (Oxford University Press, 1987)
Azolla as a biofertilizer for rice in Sri Lanka

Kulasooriya, S.A.; Hirimburegama, W.K.; Abeysekera, S.W. (Martiness Nijhoff and W. Junk Publishers:Leiden, 1984)
Deep placement:a method of nitrogen fertilizer application compatible with algal nitrogen fixation in wetland rice soils

Roger, P.A.; Kulasooriya, S.A.; Tirol, A.C.; Craswell, E.T. (1980)
Biological nitrogen fixation and crop production

Thirukkumaran, P.; Mudannayake, C. (Department of Agriculture:Peradeniya, 1988)
Selected notes on the manuring of tea

Eden, T. (1982)
Lysimetric studies on N-losses under different fertilizer management systems

Premaratne, K.P.; Gunasena, H.P.M. (National Agricultural Society of Sri Lanka:Peradeniya, 1988)

Now showing items 1-6 of 6