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International Journal of Agricultural Research
Year: 2007  |  Volume: 2  |  Issue: 12  |  Page No.: 997 - 1005

Edaphology Sorptivity and Bioaccessibility of Chromium in a Tropical Rangeland Soil

E.U. Onweremadu, E.T. Eshett, U.E. Ogundu, C.P. Anyanwu and J.C. Obiefuna    

Abstract: The study investigated influence of some soil properties on sorption and bioaccessibility of cationic chromium [Cr (III)] of rangeland soils proximal to military settlement at Obinze, Southeastern Nigeria in 2006. Field sampling was guided by a transect drawn from an open dump site away towards River Otamiri, Owerri, Southeastern Nigeria. Three land units, namely A, B and C from which soil samples were collected and analyzed using routine and special techniques. Soil and plant data were subjected to analysis of variance (ANOVA) of the Mix-model of SAS computer software and multiple regression analysis for purpose of modelling. Results showed that Cr sorption and biaccessibility varied among land units with the entire site having high potentials of bioavailability and biotoxicity. It was also found that clay-content, cation exchange capacity, soil pH and total inorganic carbon are good predictors of Cr (III) bioaccessibility in studied soil.

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