Abstract:

This study was carried out in the Tekneli Village in Uğrak Basin which is 16 km away from Tokat city center. In this study, possible variations in the soil erodibility factors values of five different parts of a complex slope were investigated. Five parts of the complex slope were determined as summit, shoulder, back-slope, foot-slope and toe-slope. A total of 25 topsoil samples were collected from each section of complex slope. Organic matter, texture, very fine sand, hydraulic conductivity, structure type and size were determined, and K factor values were calculated. Soil erodibility values of different parts of the complex slope varied between 0.02 - 0.09 t h ha MJ−1 mm−1 ha−1 and were classified as very slightly erodible soils. There was no statistically significant difference between the soil erodibility of different parts of the slope. Along the slope, the soils erodibility has been quite low and showed a low risk of water erosion. Among the textural fractions, the sand content at the back slope and the clay content at the summit were highest, and the silt content showed close values to each other in each slope segments. Organic matter and aggregate stability contents were close to each other in all slope sections. On the other hand, lime content was wash away from the upper slope sections and accumulated in the toe-slope section.

Keywords: