SoilGrids is a system for digital soil mapping based on global compilation of soil profile data and environmental layers.
Maps of the following soil properties are available: pH, soil organic carbon content, bulk density, coarse fragments content, sand content, silt content, clay content, cation exchange capacity (CEC), total nitrogen as well as soil organic carbon density and soil organic carbon stock.
The tool can be accessed for free on the following link:  https://soilgrids.org/