The Magnetic Susceptibility and Iron Oxides of Aquic Soils in Southern Iran
- Authors: Owliaie H.R.1,2, Najafi Ghiri M.1,2
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Affiliations:
- Department of Soil Science, College of Agriculture
- College of Agriculture and Natural Resources of Darab
- Issue: Vol 51, No 10 (2018)
- Pages: 1252-1265
- Section: Soil Physics
- URL: https://journals.rcsi.science/1064-2293/article/view/224785
- DOI: https://doi.org/10.1134/S1064229318100095
- ID: 224785
Cite item
Abstract
An investigation of the effect of aquic conditions on Fe-oxides distribution and magnetic susceptibility (χlf) was conducted on selected soils from Southern Iran. Seven pairs of adjacent soil pedons with different soil moisture regimes (aquic and non-aquic), were selected. The average concentrations of poorly crystalline Fe (Feo) and total free Fe (Fed) in aquic soils were 0.2 and 0.07% respectively, and 0.45 and 0.9% in non-aquic soils, respectively. The ratio of Feo/Fed varied from 0.03 to 0.64. χlf ranged from 1.8 to 113 × 10−8 m3 kg−1 in the soil studied. The variation of χfd ranged from 0.0 to 9.65%. The χfd values observed in non-aquic soils were larger than in aquic soils (4.00% vs. 1.37%). Positive correlations were observed between χ and clay contents in both aquic and non-aquic soils; however, non-aquic soil samples showed a larger coefficient of determination. A positive correlation existed between χfd and χ in aquic and non-aquic soils. Higher values of χfd were observed at the soil surface of non-aquic soil samples than at deeper levels, suggesting a greater proportion of ultrafine grains. Of the soil properties that were assessed, clay, cation exchangeable capacity (CEC), Fed, Feo/Fed ratio, χlf and χfd contents, changed significantly in response to the aquic condition.
About the authors
H. R. Owliaie
Department of Soil Science, College of Agriculture; College of Agriculture and Natural Resources of Darab
Author for correspondence.
Email: owliaie@gmail.com
Iran, Islamic Republic of, Yasouj, 75918 74831; Darab
M. Najafi Ghiri
Department of Soil Science, College of Agriculture; College of Agriculture and Natural Resources of Darab
Email: owliaie@gmail.com
Iran, Islamic Republic of, Yasouj, 75918 74831; Darab