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	1.	No cover image available No cover image available Adaptive research and pre-extension testing : The case of upland rice in West Africa by Tagne P., Fotzo Spencer, Dunstan S.C Sandhu, A.S Series: Farming systems support project. Networking paper no.7 Material type: Continuing resource; Format: print Language: English Publication details: Gainesville, FL, USA University of Florida; Washington, DC, USA : Agency for International Development (AID) 1985 Availability: Items available for reference: CIAT Library: Short Loan (1)Call number: S 482 .T3. Add to cart (remove)
	2.	No cover image available No cover image available Farm-level performance of improved cassava varieties in the humid forest zone of Nigeria by Nweke, Felix I Ezumah, Humphrey C Spencer, Dunstan S.C Material type: Article; Format: print Language: English In: Journal for Farming Systems Research-Extension (USA) Availability: Items available for reference: CIAT Library: Not For Loan (1). Add to cart (remove)
	3.	International Conference of the African Association for Biological Nitrogen Fixation (AABNF) (4, 1990, Ibadan, Nigeria). Biological nitrogen fixation and sustainability of tropical agriculture : Proceedings by Mulongoy, K Gueye, Mamadou Spencer, Dunstan S.C. (eds.) Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: Chichester, GB John Wiley and Sons 1992 Availability: Items available for loan: CIAT Library (1)Call number: S 587 .5 .N5 B5. Add to cart (remove)

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