Akinmutimi Et Al


Akinmutimi et al

Journal of  Agricultural Sciences

Vol. 3 (
2), pp.101-109,
February 2013

 ISSN: 2276-7770 




DOI: http://dx.doi.org/10.15580/GJAS.2013.2.112212281


Yield and Nutrient Composition of Sweetpotato (Ipomoea
(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


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. The soil was acidic and deficient in N, % O.C.,
K, Ca, Mg and Na. Considering the total tuber weight of
sweet potato, all the ash sources increased yields over the
control, but only the KWA produced a significant (P<0.05)
increase in yield over the control. Total tuber weight of
sweet potato increased with amount of ash applied; 4 tons/ha
which gave 53.76 % increase in the total tuber weight was
optimum. SDA also, significantly (P<0.05) increased the
nitrogen, phosphorus and potassium contents of sweet potato.
8 tons/ha of the same gave the highest contents of N, P and
Key words: yield, nutrient composition, sweet potato,
sources of ash.


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