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	1.	Biological nitrogen fixation and sustainability of tropical agriculture : proceedings of the Fourth International Conference of the African Association for Biological Nitrogen Fixation (AABNF), held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 24-28 September 1990 / edited by K. Mulongoy, M. Gueye, and D.S.C. Spencer. by African Association for Biological Nitrogen Fixation. Conference (4th : 1990 : International Institute of Tropical Agriculture) Mulongoy, K Gueye, Mamadou, 1950- Spencer, Dunstan S. C Material type: Text Publication details: Chichester, West Sussex, U.K. ; New York : J. Wiley, c1992 Online resources: Publisher description Table of Contents Availability: Items available for loan: UOE Main Library (2)Call number: S587.5.N5 A36 1990, ... Place hold Save to lists
	2.	Biological nitrogen fixation for sustainable agriculture : extended versions of papers presented in the symposium, Role of Biological Nitrogen Fixation in Sustainable Agriculture, at the 13th Congress of Soil Science, Kyoto, Japan, 1990 / edited by J.K. Ladha, T. George, and B.B. Bohlool. by Ladha, J. K. (Jagdish Kumar), 1952- George, T. (Thomas), 1958- Bohlool, Behzad Ben International Congress of Soil Science (13th : 1990 : Kyoto, Japan) Series: Developments in plant and soil sciences ; v. 49 Material type: Text Publication details: Dordrecht ; Boston : [Los Baños] : Kluwer Academic Publishers ; International Rice Research Institute, 1992 Online resources: Publisher description Availability: Items available for loan: UOE Main Library (2)Call number: S587.5.N5 B56 1992, ... Place hold Save to lists
	3.	Nitrate : processes, patterns, and management / edited by T.P. Burt, A.L. Heathwaite, S.T. Trudgill. by Burt, T. P Heathwaite, A. L. (A. Louise) Trudgill, Stephen T. (Stephen Thomas), 1947- Material type: Text Publication details: Chichester ; New York : J. Wiley, c1993 Availability: Items available for loan: UOE Main Library (1)Call number: QH344 .N515 1993. Place hold Save to lists
	4.	Nitrogen management and ground water protection / edited by R.F. Follett. by Follett, R. F. (Ronald F.), 1939- Series: Developments in agricultural and managed-forest ecology ; 21 Material type: Text Publication details: Amsterdam ; New York : Elsevier, 1989 Availability: Items available for loan: UOE Main Library (2)Call number: TD427.N5 N587 1989, ... Place hold Save to lists
	5.	Biological nitrogen fixation for sustainable agriculture : extended versions of papers presented in the symposium, Role of Biological Nitrogen Fixation in Sustainable Agriculture, at the 13th Congress of Soil Science, Kyoto, Japan, 1990 / edited by J.K. Ladha, T. George, and B.B. Bohlool. by Ladha, J. K. (Jagdish Kumar), 1952- George, T. (Thomas), 1958- Bohlool, Behzad Ben International Congress of Soil Science (14th : 1990 : Kyoto, Japan) Series: Developments in plant and soil sciences ; v. 49 Material type: Text Publication details: Dordrecht ; Boston : [Los Baños] : Kluwer Academic Publishers ; International Rice Research Institute, 1992 Online resources: Publisher description Availability: Items available for loan: UOE Main Library (1)Call number: S587.5.N5 B56 1992. Place hold Save to lists