Development of pedotransfer functions for coastal plain soils using terrain attributes

Auteur(s) et Affiliation(s)

OBI, J.C.

Dept. of Soil Science and Land Resources Management, Univ., Uyo, Nigeria

OGBAN, P.I.

Dept. of Soil Science and Land Resources Management, Univ., Uyo, Nigeria

ITUEN, U.J.

Dept. of Geography and Regional Planning, Univ., Uyo, Nigeria

UDOH, B.T.

Dept. of Soil Science and Land Resources Management, Univ., Uyo, Nigeria

Description :
This study investigated the influence of terrain attributes and soil water content on soil genesis and developed pedotransfer functions (PTFs) for the coastal plain soils. Particle size fractions, bulk density, hydraulic conductivity, organic carbon, field capacity water content (FWC), permanent wilting point (PWP), and available water content (AWC) were determined. Elevation, slope, aspect, curvatures, flow direction and hill shade, compound topographic index (CTI) and stream power index (SPI) were derived from a digital elevation model. The data were analyzed using correlation, principal component and stepwise multiple regression. the results indicated that : Particle size fractions are major determinants of variability; Overland flow and ordering of recently deposited materials influence pedogenesis. Large quantities of clay move downwards in a more lateral than vertical direction. Monotonously flat terrain inhibited collision and/or abrasion of sand particles.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2014, vol. 123, p. 252-262, nombre de pages : 11, Références bibliographiques : 1 p.

Date :
2014

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais