The article reviews the impact of pyrolysis temperature and feedstock type on the physicochemical properties of biochar, which is a pyrogenic organic material produced through the pyrolysis of biomass. The properties of biochar, such as specific surface area, pH, volatile matter, carbon content, ash content, and cation exchange capacity (CEC), are influenced by the pyrolysis temperature and the type of biomass used. Higher pyrolysis temperatures generally lead to increased surface area, porosity, pH, and carbon and ash content, but decreased CEC and volatile matter content. Different feedstocks, such as crop residues and wood biomass, exhibit varying surface areas, carbon content, volatile matter, and CEC compared to animal litter and solid waste feedstocks. The physicochemical properties of biochar are crucial for its applications in soil improvement, including pollution remediation, soil fertility enhancement, and carbon sequestration. The review also discusses the mechanisms behind these changes and their implications for soil quality and biological properties.The article reviews the impact of pyrolysis temperature and feedstock type on the physicochemical properties of biochar, which is a pyrogenic organic material produced through the pyrolysis of biomass. The properties of biochar, such as specific surface area, pH, volatile matter, carbon content, ash content, and cation exchange capacity (CEC), are influenced by the pyrolysis temperature and the type of biomass used. Higher pyrolysis temperatures generally lead to increased surface area, porosity, pH, and carbon and ash content, but decreased CEC and volatile matter content. Different feedstocks, such as crop residues and wood biomass, exhibit varying surface areas, carbon content, volatile matter, and CEC compared to animal litter and solid waste feedstocks. The physicochemical properties of biochar are crucial for its applications in soil improvement, including pollution remediation, soil fertility enhancement, and carbon sequestration. The review also discusses the mechanisms behind these changes and their implications for soil quality and biological properties.