A 2004 GIS map of Soil Organic Carbon (SOC) content (%) in the surface horizon of soils in Europe, associated to a JRC internal report.
European Commission, Joint Research Centre (2026): OCTOP: Topsoil Organic Carbon Content for Europe. [Dataset] doi: 10.2905/JRC.YTP1378 PID: http://data.europa.eu/89h/jrc-esdac-6