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You are here: Home » Latest Issue » Volume 15, 2020 - Number 2 » EFFECT OF LAND USE AND TOPOGRAPHIC FACTORS ON SOIL ORGANIC CARBON CONTENT AND MAPPING OF ORGANIC CARBON DISTRIBUTION USING REGRESSION KRIGING METHOD, Carpathian Journal of Earth and Environmental Sciences, August 2020, Vol. 15, No. 2, p. 311 - 322; Doi:10.26471/cjees/2020/015/131


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Yasin DEMİR1* & Merve ERSOY MİRİCİ2
1Department Soil Science and Plant Nutrition, Faculty of Agriculture, Bingöl University, Bingöl, Turkey
2Department of Landscape Architecture, Faculty of Forestry, Bursa Technical University, Bursa, Turkey
*Corresponding author: ydemir@bingol.edu.tr


EFFECT OF LAND USE AND TOPOGRAPHIC FACTORS ON SOIL ORGANIC CARBON CONTENT AND MAPPING OF ORGANIC CARBON DISTRIBUTION USING REGRESSION KRIGING METHOD, Carpathian Journal of Earth and Environmental Sciences, August 2020, Vol. 15, No. 2, p. 311 - 322; Doi:10.26471/cjees/2020/015/131

Full text

Abstract:

The study investigates the effects of land use type and topographic properties on soil organic carbon (SOC) in a catchment with a high annual soil loss due to erosion. In addition, the SOC content was determined by modeling the SOC distribution map using the regression-kriging (RK) method. Within this context, the effects of forest land (FL), degraded forest (DF), barren area (BA) and agricultural areas (AA) and different topographic factors (elevation, slope, aspect) on SOC were examined. The catchment had an area of 10675 ha and 429 soil samples were collected to determine the SOC contents of the soils. The results revealed that land use type had a significant effect on SOC and FL had the highest SOC content. However, there was no relationship between elevation and SOC. On the other hand, the SOC content decreased inversely proportional to the slope of the lands. The soil loss due to erosion is considered an important factor causing the decrease. The aspect of the land was also determined to have an important effect on the SOC content. The increase was mostly attributed to relatively less sunlight received by the northern slopes in Turkey. The lands on the northern slopes had the highest SOC content, while the lowest SOC content was determined in the southwest areas. The SOC contents depending on the land use type were close to each other according to the RK and normal regression methods.



Keyword: soil organic carbon, land use, soil management, soil ecology, regression kriging


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