Determination Of Some Physical And Chemical Properties, And Erodibility Indices Of Bare Land Soils (A Case Study From Boyabat,Sinop)

The aim of this study was to assess some physical, chemical properties and soil erodibility indices of bare land soils in Sinop-Boyabat district. To do so, totally 60 soil samples were collected by taking 30 samples from the upper layer (0-20 cm) and 30 samples from the bottom layer (20-40 cm) by digging thirty soil pit. Some physical (sand, silt, clay, field capacity, wilting point, available water holding capacity) and chemical (pH, electrical conductivity, organic carbon, CaCO3) properties of soils and also their erodibility index (clay ratio, colloid moisture equivalent, erosion ratio, dispersion ratio) were determined. The texture of the soil found in the study area was loamy clay; the characteristics of the soil were found as lime soil and lithe alkaline. Topsoil and subsoil erodibility indices were found. These values were 1.70, and 1.65 of colloid moisture equivalent, 24.78%, and 23.16% of dispersion ratio and 14.93, and 14.51 of erosion ratio, respectively. When these values are taken into account, it was found that the soil was erosion sensitive in terms of dispersion ratio and erosion ratio; and erosion-resistant in terms of colloid moisture equivalent. Water is main erosive factors in the study area. The results showed that the soil without vegetation cover would be eroded by erosive rainfall unless precautions are taken.