Correction to: Evaluating the two-pool decay model for biochar carbon permanence (Biochar, (2025), 7, 1, (9), 10.1007/s42773-024-00408-0)

Following publication of the original article (Sanei et al. 2025), it is reported that Fig. 1 was incorrect, in which the grey line in the figure was mistakenly moved above the blue dots. The mistake was caused by production during the figure’s conversion process. Incorrect Fig. 1: (Figure presented.) Comparison of the estimated F_perm (fraction of carbon remaining after 100 years) from Woolf et al. (2021) using their two-pool model and the F_perm calculations with the C1 carbon pool intentionally set to zero. This comparison demonstrates almost perfect alignment with the parity line, indicating that the C1 pool is irrelevant in the model. The results suggest that the F_perm estimates are effectively governed by a single carbon pool decay, despite the nominal use of a two-pool model Correct Fig. 1: (Figure presented.) Comparison of the estimated F_perm (fraction of carbon remaining after 100 years) from Woolf et al. (2021) using their two-pool model and the F_perm calculations with the C1 carbon pool intentionally set to zero. This comparison demonstrates almost perfect alignment with the parity line, indicating that the C1 pool is irrelevant in the model. The results suggest that the F_perm estimates are effectively governed by a single carbon pool decay, despite the nominal use of a two-pool model Reference in Fig. 1 can be found in the original published version of Sanei et al. (2025). The original article (Sanei et al. 2025) has been updated.