Table of Contents
ISRN Soil Science
Volume 2012 (2012), Article ID 198303, 5 pages
http://dx.doi.org/10.5402/2012/198303
Research Article

Modeling of Permanent Wilting from Particle Size Fractions of Coastal Plain Sands Soils in Southeastern Nigeria

1Department of Soil Science and Technology, Federal University of Technology, Owerri, PMB 1526 Owerri, Nigeria
2Department of Soil Science, University of Uyo, PMB 1017 Uyo, Nigeria

Received 29 April 2012; Accepted 28 May 2012

Academic Editors: M. Bernoux and Z. L. He

Copyright © 2012 Chinedu Innocent Obi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Permanent wilting points in soils have been found to correlate significantly with particle size fractions. This study was conducted to establish functional relationship between soil particle size fractions and permanent wilting point of soils of coastal plain sands in southeastern Nigeria. A total of 102 surface samples were collected from three different dominantly Ultisols toposequences (i.e., 34 samples from each). Permanent wilting point experiment was carried out in pots with the 102 samples in the greenhouse while the particle size analysis was carried out in the laboratory. There was significant correlation among the textural separates, permanent wilting point correlated significantly with clay ( π‘Ÿ = 0 . 2 1 , 𝑃 ≀ 0 . 0 5 ). The general linear model showed significant differences between permanent wilting point of soils found in the upper and lower slope positions. Regression equation established that 54% of the total variation in permanent wilting point could be accounted for by the clay and coarse sand content of the soils. Prediction of permanent wilting point of Ultisols formed on coastal plain sands soils of humid tropical southeastern Nigeria will effectively depend on reliability of determination of clay and coarse sand contents of the soils.