3.5. CO2 release and kinetic modelling
Over the entire incubation period of 94 days, the respiration rate
of the untreated and treated soil was quantified as CO2-C production. The total CO2-C released is shown in Fig. 4a. All
amendments tested enhanced the CO2 emission from soil, but in
the case of eggshell derived materials (CES and ES) the increasewas
more pronounced compared to the initial soil sample (about 2-3
fold for T2 and T3 application rates).