Soil Evolution as affected by variation of soil forming factors using magnetic susceptibility technique along Bardsir-Khaneh Sorkh transect

Articles in Press

Document Type : Research Paper

Authors

1 MSc Student, Deptartmenr of Soil Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran

2 Department of Soil Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran

Abstract

Magnetic susceptibility is useful to evaluate the effect of soil forming factors on soil evolution. The present research was carried out to compare different soil development indices related to parent material (sedimentary and igneous) and soil moisture regimes (aridic and xeric) along Bardsir-Khaneh Sorkh transect in Kerman. That is why 6 pedons affected by different parent material and soil moisture regimes were selected. The evolution of studied pedons was compared using magnetic susceptibility values, crystalline iron (Fed) extracted by citrate- bicarbonate- dithionate, non-crystalline iron (Feo) extracted by acid ammonium oxalate, morphological soil properties, and diagnostic horizons. Aridisols, Inceptisols, and Alfisols were found using Soil Taxonomy (2022). Results of the study showed the maximum magnetic susceptibility in pedon 5 with igneous parent material and the minimum content in pedon 4 with calcareous parent material. Pedon 2 with an aridic soil moisture regime showed a lower magnetic susceptibility compared to pedon 5 with a xeric moisture regime, whereas the parent material for both pedons was the same. Pedons located on the xeric moisture regime had higher magnetic susceptibility values compared to the aridic regime. A positive significant correlation (R=0.561, 99% probability level) between soil evolution index (Fed-Feo) and χlf values and a negative significant correlation (R=0.4492, 99% probability level) between non-crystalline iron (Feo/Fed) and magnetic susceptibility were found. Results of the study showed that magnetic susceptibility distribution in the soil profile was affected by the distribution of different iron forms, soil evolution, parent material, climate, and weathering rate in different soil layers.

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Iranian Journal of Soil and Water Research

Articles in Press, Accepted Manuscript
Available Online from 10 May 2025

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