title: Activatory effect of some rare earths on microbial nitrogen transformations.
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D002244:Carbon / Q000378:metabolism; D003470:Culture Media; D007811:Lanthanum / Q000494:pharmacology*; D009586:Nitrogen Fixation / Q000187:drug effects*; D011221:Praseodymium / Q000494:pharmacology*; D012988:Soil Microbiology
chemical_list: D003470:Culture Media; D007811:Lanthanum; D002244:Carbon; D011221:Praseodymium