Variable,Description 
Site_ID,ID of the site as used in the manuscript
Location,north and south location 
HyPy_PyC_SOC_pc,Average proportion of PyC_HyPy (PyC extracted by HyPy) of total SOC [%]
HyPy_PyC_content_mggsoil,Average absolute  PyC_HyPy content [mg/gsoil]
Bulk_F14C,Average bulk SOC F14C value [-]
HyPy_PyC_F14C,Average PyC_HyPy F14C value [-]
Moisture_class,"Moisture class with (1) dry, (2) moist and (3) wet, as presented in Schiedung et al. (2022, https://doi.org/10.1016/j.catena.2022.106194)"
Clay_pc,"Proportion of clay, as presented in Schiedung et al. (2022, https://doi.org/10.1016/j.catena.2022.106194) "
Silt_pc,"Proportion of clay, as presented in Schiedung et al. (2022, https://doi.org/10.1016/j.catena.2022.106194) "
Sand_pc,"Proportion of clay, as presented in Schiedung et al. (2022, https://doi.org/10.1016/j.catena.2022.106194) "
OL_thickness_cm,"Thickness of organic layer, as presented in Schiedung et al. (2022, https://doi.org/10.1016/j.catena.2022.106194) , "
SOC_wpc,"Average SOC content in [%], as presented in Schiedung et al. (2022, https://doi.org/10.1016/j.catena.2022.106194)"
d13C_SOC_permil,"Average, Delta 13C of soil organic carbon in [permil], as presented in Schiedung et al. (2022, https://doi.org/10.1016/j.catena.2022.106194)"
SOC_TN,"Average, SOC to TN ratio"
pH_CaCl2,"pH to CaCl2 ratio, as presented in Schiedung et al. (2022, https://doi.org/10.1016/j.catena.2022.106194)"
CEC_eff,"Effective cation exchange capacity [meq/100g], as presented in Schiedung et al. (2022, https://doi.org/10.1016/j.catena.2022.106194)"
Fe_WRF_wpc,Total Fe content determined on composite samples by XRF [%]
Al_XRF_wpc,Total Al content determined on composite samples by XRF [%]
aliphatic_aromatic,"Average, aliphatic to aromatic ratio determined by mid infrared spectroscopy, as presented in Schiedung et al. (2022, https://doi.org/10.1016/j.catena.2022.106194)"