Physical Atributes and Organic Carbon of An Oxisol Affected by Different Land Use and Soil Management.

Understanding and quantifying the impact of land use systems and soil management in soil organic carbon (COS) levels and physical properties are essential for the development of sustainable agricultural. This research aimed to evaluate some Oxisol physical attributes and COS from the Northwest area of Paraná state, which are under different use and soil management systems, like: under native forest, cultivated with pasture, cassava, or sugarcane. Deformed samples were collected for particle size, particle density, proctor and organic carbon analysis and undeformed samples (rings) were collected for determining the bulk density (Ds) and soil porosity. The results indicated that the use and management systems studied induced to changes in the soil physical attributes in relation to the native forest. This was verified by the largest values of Ds, maximum bulk density, and relative bulk density of the soil, and smaller values of macroporosity, total porosity, COS and soil carbon stock, in the following growing order: pasture, cassava and sugarcane. However, the areas are not considered physically degraded.