title: [Effect of ammonium nitrate on the nitrogenase activity of tropical atmospheric nitrogen fixation bacteria].
mesh_terms: D001395:Azotobacter / Q000201:enzymology; D001419:Bacteria; D003470:Culture Media; D046508:Culture Techniques; D009566:Nitrates / Q000494:pharmacology*; D009586:Nitrogen Fixation; D009591:Nitrogenase / Q000378:metabolism*; D013997:Time Factors
chemical_list: D003470:Culture Media; D009566:Nitrates; D009591:Nitrogenase
vernacular_title: Efecto del nitrato y amonio en la actividad de la nitrogenasa de bacterias tropicales fijadoras de nitrógeno atmosférico