Fru Billa, S.; Evaristus Angwafo, T.; Francis Ngome, A. Agro-Environmental Characterization of Biochar Issued from Crop Wastes in the Humid Forest Zone of Cameroon. Int. J. Recycl. Org. Waste Agric. 2018, 8 (1). https://doi.org/10.1007/s40093-018-0223-9.