title: VITAMIN B12 COMPOUNDS IN RELATION TO THE REQUIREMENT OF COBALT FOR HIGHER PLANTS AND NITROGEN-FIXING ORGANISMS.
mesh_terms: D001395:Azotobacter; D003013:Clostridium; D003035:Cobalt; D003067:Coenzymes; D056890:Eukaryota; D000455:Medicago sativa; D008660:Metabolism; D009584:Nitrogen; D009586:Nitrogen Fixation; D010944:Plants; D012106:Research; D012231:Rhizobium; D014805:Vitamin B 12
chemical_list: D003067:Coenzymes; D003035:Cobalt; D009584:Nitrogen; D014805:Vitamin B 12
keywords: ALFALFA; ALGAE; AZOTOBACTER; CLOSTRIDIUM; COBALT; COENZYMES; EXPERIMENTAL LAB STUDY; METABOLISM; NITROGEN FIXATION; PLANTS; REVIEW; RHIZOBIUM; VITAMIN B 12