%0 Journal Article %T Effects of Organic and Inorganic Materials on Soil Acidity and Phosphorus Availability in a Soil Incubation Study %A P. A. Opala %A J. R. Okalebo %A C. O. Othieno %J ISRN Agronomy %D 2012 %I Hindawi Publishing Corporation %R 10.5402/2012/597216 %U http://dx.doi.org/10.5402/2012/597216