Akinmutimi et al Greener Journal of Agricultural Sciences Vol. 3 (2), pp.101-109, February 2013 ISSN: 2276-7770 Research Paper Manuscript Number:112212281 DOI: http://dx.doi.org/10.15580/GJAS.2013.2.112212281 Yield and Nutrient Composition of Sweetpotato (Ipomoea batatas (L) Lam) as Influenced by Application of Three Different Sources of Ash Akinmutimi A.L., Osodeke V.E., and Ano A.O. Department of Soil Science and Meteorology, College of Crop and Soil Sciences, Michael Okpara University of Agriculture, Umudike. P.M.B. 7267, Umuahia, Abia State, Nigeria. *Correspondence author’s email: biolalucia@ yahoo.co. uk. Phone number: 08035666900 Abstract: Three different ash materials (kitchen wood ash –KWA, oil palm bunch ash-PBA and timber saw mill ash- SDA) applied at the rates of 0, 2, 4, 6 and 8 tons/ha were incorporated in an Ultisol planted with sweetpotato to evaluate their effects on yield and crop quality, using sweet potato as a test crop. 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