Abstract
This research work studies the impacts of irrigation and other agricultural practices on the soil along the bank of Tungan Kawo dam. The experimental analysis evaluates the soil physicochemical parameters and metal (Cd, Cu, Cr, Ni, Fe, Mn, Pb and Zn) concentrations using sequential extractions. The physicochemical parameters of the soils across the sites indicated values reported for less polluted soils. Also, analysis of total metals in the soils indicated lower concentration of all metals evaluated than recommended standard limits with exception of Cd. The results of sequen tial extraction of heavy metal in soil sample indicated that all metals were mainly associated with the residual, Fe-MnO and organic bound fractions. The residual fraction has the maximum concentration of metals especially in cool and dry season for Cr, Cu, Ni, Pb and Zn, whereas only a small fraction of all the heavy metal is extracted in water soluble, exchangeable and carbonate bound fractions. It indicates that the bioavailability index is low. Hence, mobility of the heavy metals by the surrounding plants grown on the soils is low.
Highlights
Pollution of the environment is an important problem in human’s life that leads to a miserable condition
Though Fe is not toxic heavy metals, it analysis in the present study indicates its predominance of all the metal in all sites
2) With the exception of Cd, all metals evaluated in this study were lower than recommended standard limits
Summary
Pollution of the environment is an important problem in human’s life that leads to a miserable condition. (2016) Seasonal Quality Assessment of Agricultural Soils along the Bank of Tungan Kawo Dam, Kontagora, Nigeria. The soil being the repository of all pollutants is most affected because soil is used for vegetation of edible plants and plants are taken in as part of our food. Soil is a very important natural resource to man as it is a source of his life on this planet. Soil is often contaminated by human activities and this is reflected in the high horizontal and vertical variability brought about by the anthropogenic influence on soil formation and development [1]
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