CeriumConductometryNitratesAmmoniaFertilizersNitrogenNitrate ReductaseQuaternary Ammonium CompoundsAmmonium ChlorideAmmonium SulfateAmmonium CompoundsNitrate Reductase (NADH)Silver NitrateNitrosomonasGlutamate-Ammonia LigaseAmmonium HydroxideHydrogen-Ion ConcentrationGlutamineUreaNitrate Reductase (NAD(P)H)Carbamoyl-Phosphate Synthase (Ammonia)NitrificationChloratesMethylaminesHyperammonemiaAnion Transport ProteinsOxidation-ReductionNitrogen RadioisotopesNitrogen IsotopesMolybdenumAmino AcidsNitrogen CompoundsGlutamate DehydrogenaseGlutamate SynthaseOxidoreductasesCulture MediaMolecular Sequence DataPotassium CompoundsKineticsPlant RootsNitrogen FixationDenitrification