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Research Journal of Environmental Sciences
  Year: 2007 | Volume: 1 | Issue: 2 | Page No.: 47-55
DOI: 10.3923/rjes.2007.47.55
 
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Predicting Phosphorus Sorption Characteristics in Highly Weathered Soils of South-Eastern Nigeria

E.U. Onweremadu

Abstract:
This study investigated Phosphorus (P) sorption characteristics of 60 soil samples formed over 6 different parent materials in south-eastern Nigeria relating that to some soil properties. Soils were analyzed for pH, clay, Bulk Density (BD), Organic Carbon (OC), Mehlich-3 extractable calcium (CaM3) ammonium oxalate and Mehlich-3 extractable P, aluminium (Al) and iron (Fe). The oxalate and Mehlich-3 extractable elements were used in estimating Phosphorus Saturation Index (PSI). There were significant relationships between P saturation indices and soil attributes in the study site at p&le0.01 and p&le0.05. However, these correlations were least in shale-derived soils due to high content of CaM3. A P-sorption capacity model resulted from a multiple regression analysis using soil attributes as independent variables. The model showed high predictive ability (r2 = 0.77; RMSE = 3.70) with little underestimation (bias = -0.09).
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How to cite this article:

E.U. Onweremadu , 2007. Predicting Phosphorus Sorption Characteristics in Highly Weathered Soils of South-Eastern Nigeria. Research Journal of Environmental Sciences, 1: 47-55.

DOI: 10.3923/rjes.2007.47.55

URL: https://scialert.net/abstract/?doi=rjes.2007.47.55

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