Biochar produced from pyrolysis of biomass has great potentials to be used the agricultural sector. With unique properties, use of biochar in agronomy can improve soil fertility, increase crop yields and sequestrate carbon as well. Production conditions have considerably effects on yield and property of biochar and gas and liquid by-products. In this work, the impacts of atmosphere (CO2 and N2) , highest treatment temperature (HTT) and feedstock on yield of solid, liquid and gas products from pyrolysis of spruce wood and bark are evaluated, together with characteristics of the produced biochar. The findings in this study indicate that the carbon neutral biomass and CO2 could be co-utilized as feedstock and influencing carrier gas with multi benefits for biochar production, energy generation and waste management.