ID,Contiunuous numbering but with excluding cores that were preserved and not sampled (one core per treatment and per site) Site_ID,"Site ID with S1-S6 and N1-N5 as reported in the manuscript and in Schiedung et al. (2022; Catena, DOI: 10.1016/j.catena.2022.106194) " Treatment,"Control (no labelled material), grass and char (PyC) treatment" d13C_bulk_permil,Measured stable (delta) isotope composition of each sample in [permil] bulk_pc,Measured total carbon of each sample in [wt%] f_POM_pc,Fraction of POM on total C [%] TC_POM_mg_gsoil,Absolut C content of POM fraction [mg C / g soil] d13C_POM_permil,Stable isotope composition of POM [permil] f_S_A_pc,Fraction of S+A on total C [%] TC_S_A_mg_gsoil,Absolut C content of S+A fraction [mg C / g soil] d13C_S_A_permil,Stable isotope composition of S+A [permil] f_s_c_pc,Fraction of s+c on total C [%] TC_s_c_mg_gsoil,Absolut C content of s+c fraction [mg C / g soil] d13C_s_c_permil,Stable isotope composition of s+c [permil]