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Using Magnetic Susceptibility Mapping for Assessing Soil Degradation Due to Water Erosion.
- Source :
- Soil & Water Research; 2016, Vol. 11 Issue 2, p105-113, 9p
- Publication Year :
- 2016
-
Abstract
- This study focused on developing a method for estimating topsoil organic carbon content from measured massspecific magnetic susceptibility in Chernozems heavily affected by water erosion. The study was performed on a 100 ha area, whereby 202 soil samples were taken. A set of soil samples was divided into 3 subsets: A (32 samples), B (67 samples), and C (103 samples). The mass-specific magnetic susceptibility using low (χ<subscript>lf</subscript>) and high (χ<subscript>hf</subscript>) frequency, and organic carbon content were measured at all soil samples. The contents of iron and manganese, extracted with a dithionite-citrate solution (Fe<subscript>d</subscript>, Mn<subscript>d</subscript>) and ammonium oxalate (Fe<subscript>o</subscript>, Mn<subscript>o</subscript>), were quantified in A and B samples. Models for predicting organic carbon content from magnetic susceptibilities were designed as follows: (1) subset A was used as the training set for calibration, and subsets B and C were used as the test sets for model validation, either separately (subset B only), or together (merged subsets B and C); (2) merged subsets A and B were used as the training set and subset C was used as the test set. Results showed very close correlations between organic carbon content and all measured soil properties. Obtained models relating organic carbon content to mass-specific magnetic susceptibility successfully predicted soil organic carbon contents. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18015395
- Volume :
- 11
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Soil & Water Research
- Publication Type :
- Academic Journal
- Accession number :
- 114967962
- Full Text :
- https://doi.org/10.17221/233/2015-SWR