%0 Journal Article %T Modeling of Permanent Wilting from Particle Size Fractions of Coastal Plain Sands Soils in Southeastern Nigeria %A Chinedu Innocent Obi %A Jude C. Obi %A Emmanuel U. Onweremadu %J ISRN Soil Science %D 2012 %I Hindawi Publishing Corporation %R 10.5402/2012/198303 %U http://dx.doi.org/10.5402/2012/198303