Njiayouom et al Greener Journal of Agricultural Sciences Vol. 5 (1), pp. 014-022, February 2015. ISSN: 2276-7770 Research Paper Manuscript Number: 081214324 DOI: http://doi.org/10.15580/GJAS.2015.1.081214324 Adaptability and Response of NERICA Upland Rice Varieties to Fertilizer Application in the Mono Modal Rainfall Forest Zone of Cameroon 1Njiayouom Ibrahim, *2Ngome Ajebesone Francis, 3Suh Christopher, 4Misse Alain Institute of Agricultural Research for Development (IRAD) Cameroon. Emails: 1Email: njiayou @yahoo. fr, 3Email: suhchristopher @yahoo. com, 4Email: christianmisse @yahoo. fr *Corresponding Author’s Email: ngomajebe @ yahoo.com; Phone number: (+237)78967402 Abstract A study was conducted in Barombi-kang, in the forest agro-ecological zone with mono modal rainfall pattern in Cameroon to evaluate the adaptability of selected NERICA upland rice varieties and their response to fertilizer application. A factorial split plot experimental design in a randomized complete block with three replications was used. The first factor included: T0 (unfertilized control), T1 (200 kg NPK / ha + urea 100 kg/ha) and the second factor included 7 varieties of rice namely NERICA 1, NERICA 2, NERICA 3, NERICA 4, NERICA 8, NERICA 10 and Fofifa. Varieties tested were well adapted to the mono modal rain forest agro-ecological zone. Thus, average cycle duration was 100 days and grain yield ranged between 1.4 and 2.3 t/ha without fertilizer use. Yield and yield components were significantly (p<0.05) enhanced by fertilizer application particularly grain yield (146%), grain per panicle (59%), straw yield (50%). Highly significant correlations (p<0.05; r = 0.60 to 0.90) were observed between grain yield and most of the yield components. Further studies are warranted to address the yield gap existing between farmers’ practice and on-station research before disseminating these varieties to farmers. 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