The rate of CO2eC accumulation from soil treatments fitted the
kinetic models described by Eqs. (2) and (3). The fitting parameters can be found in Table 4 for each kinetic model. Overall, the parallel first order model was found to describe data better (higher R2 adj)
than first order E-model. For CES_T1 and CES_T2 both models seem
adequate, since the contribution of Cf (carbon fraction with fast
turnover to CO2eC) in both cases is very low and the kf is high.