We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Erodibility in relation to water-dispersible clay for some soils of eastern Nigeria.
- Authors
C. A. Igwe
- Abstract
Water dispersible clay (WDC) can influence soil erosion by water. Therefore, in highly erodible soils such as the ones in eastern Nigeria, there is a need to monitor the clay dispersion characteristics to direct and modify soil conservation strategies. Twenty-five soil samples (020 cm in depth) varying in texture, chemical properties and mineralogy were collected from various locations in central eastern Nigeria. The objective was to determine the WDC of the soils and relate this to selected soil physical and chemical attributes. The soils were analysed for their total clay (TC), water-dispersible clay (WDC), clay dispersion ratio (CDR), dispersion ratio (DR), dithionite extractable iron (Fed), soil organic matter (SOM), exchangeable cations, exhangeable sodium percentage (ESP) and sodium adsorption ratio (SAR). Total clay contents of the soil varied from 80560 g kg-1. The USLE erodibility K ranges from 002 to 01 Mg h MJ-1 mm and WEPP K fall between 12??10-617??10-6 kg s m-4. The RUSLE erodibility K correlated significantly with CDR and DR (r?=?044; 039). Also, a positive significant correlation (r?=?071) existed between WEPP K and RUSLE K. Soils with high clay dispersion ratio (CDR) are highly erodibile and positively correlates (p?<?051) with Fed, CEC and SOM. Also, DR positively correlates with Mg2+ and SOM and negatively correlate with ESP and SAR. Principal component analysis showed that SAR, Na+ and percent base saturation play significant role in the clay dispersion of these soils. The implication of this result is that these elements may pose potential problem to these soils if not properly managed. Copyright 2005 John Wiley & Sons, Ltd.
- Subjects
EASTERN Nigeria; CLAY soils; SOIL erosion; SOIL conservation
- Publication
Land Degradation & Development, 2005, Vol 16, Issue 1, p87
- ISSN
1085-3278
- Publication type
Article
- DOI
10.1002/ldr.647