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Use of magnetic measures to assess soil redistribution following deforestation in hilly region
Authors:Parisa Mokhtari Karchegani  Shamsollah Ayoubi  Sheng Gao Lu  Naser Honarju
Institution:aDepartment of Soil Science, College of Agriculture, Islamic Azad University, Khorasgan Branch, Isfahan, Iran;bDepartment of Soil Science, College of Agriculture, Isfahan University of Technology, 84156-83111, Isfahan, Iran;cCollege of Environmental and Resource Sciences, Zhejiang University, China
Abstract:Limited information is available about the use of magnetic susceptibility property to determine soil redistribution in hilly areas of the semi-arid regions. This study was conducted to evaluate the use of magnetic properties to determine soil redistribution along a hill slope following deforestation. The study area is located in the Quaternary hilly region of Lordegan district in west Iran. Ten transects were established in two land uses that included natural Querqus forested and cultivated lands. Soil samples were collected at different positions along the slope and magnetic properties (χlf, χhf, SIRM, ARM, and χfd) and selected physico-chemical properties were determined. The results (based on the χfd, SIRM/ARM) showed that the magnetic susceptibly in the calcareous materials is pre-dominantly derived during the pedogenic processes and the superparamagnetic particles which were transported to lower positions of hill slope following deforestation. The results confirmed that this methodology could be applied for monitoring soil redistribution along the slope in calcareous hilly areas in the semi-arid regions.
Keywords:Abbreviations: SOM  Soil organic matter  CCE  Calcium carbonate equivalent  Min  Minimum  Max  Maximum  S  D  Standard deviation  Skew  Skewness  Kurt  Kurtosis  C  V  Coefficient of Variation  ANOVA  Analysis of variance  χlf  Magnetic susceptibility at low frequency  χhf  Magnetic susceptibility at high frequency  SIRM  Saturation isothermal remanent magnetization  ARM  Anhysteritic remnanet magnetization  χfd  Frequency dependence  NF  Natural forest  CL  Cultivated land  SU  Summit  SH  Shoulder  BS  Back slope  FT  Foot slope  TS  Toe slope  XRD  X-ray diffraction
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