title: The biotransformation of lignin to humus facts and postulates.
mesh_terms: D001419:Bacteria / Q000378:metabolism; D005658:Fungi / Q000378:metabolism; D006812:Humic Substances / Q000378:metabolism; D008031:Lignin / Q000378:metabolism*; D012988:Soil Microbiology
chemical_list: D006812:Humic Substances; D008031:Lignin