Correction to: Geochem Trans (2020) 21:4https://doi.org/10.1186/s12932-020-00069-5

The original version of this article unfortunately contained a mistake. The presentation of Fig. 4 was incorrect. That is, in Fig. 4, the bottom graph in the figure should be removed.

The correct version of Fig. 4 is given below.

Fig. 4
figure 4

The mean pH calculated for the different pCO2 (400, 1000, 2500, 5000, 10,000 µatm pCO2) concentrations using the carbonate system model for the 9 soil samples

The original article has been corrected [1].