Annual soil organic carbon (SOC) stocks (t C ha-1, 0-30 cm depth) of Swiss agricultural soils simulated with the model RothC for the years 2020-2100. Simulations were performed for 240 strata (regions with similar agricultural production types, climatic conditions and clay content). The SOC stocks are weighted averages across strata for the national scale. Each column contains SOC stocks for a specific combination of a climate model chains (nine in total) and an emission scenario (three in total: RCP 26, RCP 45, RCP 85) (specified in column header). The results include simulated SOC stocks for a baseline scenario and five soil carbon sequestration (SCS) scenarios (cover crops, biochar amendment at two rates, biochar amendment based on biomass from two agroforestry scenarios). The SCS scenarios were only performed on cropland, therefore there is only a single file for grassland (the baseline scenario). All simulations (i.e. baseline as well as the five scenarios) account for changes in crop shares and organic matter additions associated with growing food demand as well as climate change. The scenarios are described in Keel et al. Global Change Biology (submitted) CL_baseline: Baseline scenario for cropland (CL) GL_baseline: Baseline scenario for permanent grassland (GL) CL_cover_crops: Cover crop scenario for cropland CL_biochar_I: Biochar I scenario for cropland CL_biochar_II: Biochar II scenario for cropland CL_agroforestry_I: Agroforestry I scenario for cropland CL_agroforestry_II: Agroforestry II scenario for cropland