While SOC dynamic models have been extensively validated on
long term experiments , collecting a comprehensive data to allow for validation at the regional or national
scale remains a challenge. For Belgium, around 600 soil profiles of an extensive
historic soil inventory from the 1960's were re-sampled in 2005
covering the major soil types and agricultural regions and the change
in SOC stock was assessed. The RothC model simulated the changes in
SOC stock for 23 combinations of agricultural regions and soil types in
both grassland and cropland