Determining the temporal variability of the soil quality index in the afforestation areas

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Çomaklı E., Turgut B., Öztaş T.

10th International Congress on "The Soil Resources and Environment Conservation", Almati, Kazakhstan, 17 - 19 October 2018, pp.86

  • Publication Type: Conference Paper / Summary Text
  • City: Almati
  • Country: Kazakhstan
  • Page Numbers: pp.86
  • Karadeniz Technical University Affiliated: No


The aim of this study was to determine the soil quality index (SQI) in the afforestation areas established in different times for erosion control in Erzurum, Turkey. For this purpose, four afforestation areas was selected as plots due to their establishing times (>40 years old, 20-30 years old, 10-20 years old, and <10 years old) and 20 soil samples were taken in each plots. A total of 80 soil samples were taken for analysis that included clay content (CC), silt content (SC), sand content (SaC), mean weight diameter (MWD), aggregate stability (AS), pH, electrical conductivity (EC), total nitrogen (TN), total carbon (TC), and total sulphur (TS). These properties were used as indicators, and the Analytic Hierarchy Process (AHP) and factor analysis were used for weighting the indicators. Indicators were scored using the linear score functions “more is better” and “optimum value”. For determining SQI, the additive method (SQIA), the weighted method with AHP (SQIAHP), and the weighted method with factor analysis (SQIFA) were used. The SQI scores of the plots showed statistically significant differences