title: Fixation of atmospheric nitrogen by microorganisms.
mesh_terms: D000383:Agriculture; D001272:Atmosphere; D005524:Food Technology; D009586:Nitrogen Fixation; D009591:Nitrogenase / Q000032:analysis; D011489:Protein Denaturation; D012988:Soil Microbiology
chemical_list: D009591:Nitrogenase