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Abstract
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Article Information:
Infiltration and Sorptivity Response to Application Rice-Husk-Ash Amendment of Loamy Sand Soil in Ikpa Basin, Nigeria
O.E. Essien and A. Saadou
Corresponding Author: O.E. Essien
Submitted: November 25, 2011
Accepted: December 18, 2011
Published: September 01, 2012 |
Abstract:
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Field plot experiment investigated the effect which different methods of application of Rice-husk
Ash (RHA) amendments (viz: RHA surface mulching (RHA-MUL) and RHA mixing (RHA-MIX)) with topsoil
of loamy sand had on the soil’s infiltration rate and sorptivity in a humid tropical environment. Data were
obtained using double-ring infiltrometer from replicated plots analyzed using SPSS ver. 17 package for
descriptive statistics, graphs, least squares regression and ANOVA. Paired sample statistics showed significant
differences in infiltration rates between RHA-MIX and both the control soil and RHA-MUL, with the constant
infiltration rate being significantly less, hence more water-saving in the RHA-MIX application than in both the
control and RHA-MUL soils. Sorptivity and the accumulated infiltration also varied significantly. RHA-MUL
did not show clear difference from the control soils. The least squares regression predicted the cumulative
infiltration rate very accurately at R2 = 0.997 and 0.998 in the two treatments although the RHA-MIX
converged more gradually (longer elapse-time) to the constant infiltration rate than RHA-MUL. RHA-MIX
method was preferable for loamy sands. RHA amendment benefited irrigation water savings in loamy sands
due to resultant improvement in capillary flow in the filter media.
Key words: Constant infiltration rate, loamy sands, RHA amendment, sorptivity, water-holding capacity, ,
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Cite this Reference:
O.E. Essien and A. Saadou, . Infiltration and Sorptivity Response to Application Rice-Husk-Ash Amendment of Loamy Sand Soil in Ikpa Basin, Nigeria. Research Journal of Applied Sciences, Engineering and Technology, (17): 2866-2873.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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