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International Journal of Soil Science
  Year: 2007 | Volume: 2 | Issue: 3 | Page No.: 204-210
DOI: 10.3923/ijss.2007.204.210
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Basicity of Major Soil Groups in Lowland States of Southeastern Nigeria

E.U. Onweremadu

The study investigated the composition and distribution of basic cations in soils formed over different lithologies in lowland states of Southeastern Nigeria. Field and Laboratory studies were conducted in 2004 using routine methods. Soil data were subjected to analysis of variance (ANOVA) statistic using the PROC Mix-model of SAS computer package and means were separated by standard error of the difference (SED) at 5% level of probability. Results showed significant (p<0.0001) differences in the distribution of exchangeable calcium (Ca2+) and potassium (K+) among soil groups while the 4 basic cations: Ca2+, K+, magnesium (Mg2+) and sodium (Na+) differed significantly (p<0.0001) among horizons. Highest basicity (base saturation = 434.40 g kg-1) was recorded in soil formed over coastal plain sands while Bt3 horizon had the highest base saturation (438.00 g kg-1) among horizons. Elemental ratios showed highest Ca/Mg ratio of 8.60 in soil derived from Shale, with Alluvial-formed soil having the highest (Ca2+ + Mg2+)/(Al3+ + H+) ratio of 1.39. There were strong relationship (p<0.05) between exchangeable basic cations and sand and silt contents. Buffering capacity dynamics of these basic cations should be studied for more comprehension and usage of these soils for sustainability.
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How to cite this article:

E.U. Onweremadu , 2007. Basicity of Major Soil Groups in Lowland States of Southeastern Nigeria. International Journal of Soil Science, 2: 204-210.

DOI: 10.3923/ijss.2007.204.210






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