![](https://samples.ccafs.cgiar.org/wp-content/uploads/2015/05/Journal-of-plant-nutrition-and-soil-science-1.gif)
Abstract: Steam-activation increased CH4 emission of stover biochar but decreased it for wood biochar by 14%–70%. Biochar generally increased CH4emission but reduced N2O emission by 10%–41%. Emission of N2O was 17% lower for maize-stover biochar compared to Eucalyptus-wood biochar, and 3% lower for 350°C compared to 550°C pyrolysis temperature. Emission of CH4 was 21% higher for activated stover biochar compared to Eucalyptus-wood biochar and 10% lower for 350°C compared to 550°C pyrolysis temperature. No difference in net CO2equivalent was observed among biochar grades.