Document Type : Research Paper
Authors
Shiraz University
Abstract
The aim of this study was to investigate the spatial variation of some soil properties such as soil texture, organic carbon content, soil pH and electrical conductivity (EC) using geostatistical methods in Margon city, kohgiluyeh and Boyer-Ahmad province. For this purpose, from the studied area, 58 surface soil samples (0- 30 cm depth) from 0, 50, and 100 meter near the cement factory in Margon city, were collected. Some soils physical and chemical properties such as electrical conductivity (EC), pH, organic carbon content, and clay, sand, and silt percentages were analyzed. The studied properties were estimated by various interpolation methods including ordinary kriging, simple kriging, disjunctive kriging, co-kriging, and inverse distance weighting (IDW) using GIS software. The skill of these methods was evaluated by the mean absolute error (MAE), and the root mean square error (RMSE). showed that highest and lowest coefficient of variation was observed in salinity and pH, respectively. Moreover, the results indicated that conventional co-kriging method for organic carbon percentage content and soil pH, simple co-kriging method for clay and silt percentage, simple kriging method for soil EC, and conventional kriging method for sand percentage were the most suitable methods as compared to other studied methods.
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