مرکز منطقه ای اطلاع رساني علوم و فناوري - RELATIONSHIPS BETWEEN ERODIBILITY AND SOME SOIL PROPERTIES OF SOILS IN KAHRAMANMARAŞ-NARLI PLAIN

Abstract :

Generation of accelerated soil erosion depends on climate and soil properties directly, and also other factorsdetermine its dimension and direction. Determination of soil erodibility characteristic as an input to predicting models is first step for soil erosion studies. The objective of this study was to reveal the erodibility of tillage soils by using soil erodibility factor (USLE-K), which has been the subfactor of Universal Soil Loss Equation (USLE), and clay ratio (CR) indices on Kahramanmaraş-Narlı plain. For this purpose, 25 disturbed soil samples were taken from different locations on Narlı plain that contained soils generated from alluvial and kolluvial parent materials. After laboratory studies, the data obtained were transferred to digital platform and tested statistically. According to evaluation results, the erosion sensitivity of Narlı plain soils was found to be different from each other. KO values varied between 0.89 and 12.33 while USLE-K values were calculated between 0.026 and 0.097 t ha-1 ha MJ-1 h mm-1. Similar results were obtained from the evaluations made by each erodibility indices. According to both erodibility indices, the soil samples 23 and 12 were found to be the most sensitive soils to erosion, but the samples 24 and 25 were found to be the most resistant soils. The wide variability in soil erodibility was attributed to the differences in some physical and chemical properties of soils.