“…Despite the enthusiasm, biochar effect on soil and plant systems can also be neutral or detrimental, depending on a manifold of local and production parameters such as feedstock type, pyrolysis conditions, application rate and method (e.g., alone or charged with fertilizers), and pedological and climatic contexts (Chagas et al, 2022;Joseph et al, 2021). Additional limits to adoption may include sustainable feedstock sourcing and management, price, and biochar toxicity (mainly due to polycyclic aromatic hydrocarbons, dioxins, and heavy metals) (Das et al, 2023;Fridahl et al, 2021;Pourhashem et al, 2018).…”