Nitrogen FixationNitrogenaseGluconacetobacterNitrogen CycleAzotobacter vinelandiiMolybdoferredoxinNitrogenSymbiosisNitrogen CompoundsNitrogen IsotopesBlood Urea NitrogenNitrogen DioxideModels, BiologicalReactive Nitrogen SpeciesCarbonFertilizersNitrogen OxidesDietSoilAmmoniaBiomassPII Nitrogen Regulatory ProteinsNitratesPhosphorusNutritive ValueMolecular Sequence DataDigestionAmino AcidsEnergy IntakeAnimal Nutritional Physiological PhenomenaNutritional RequirementsFoodNutritional Physiological PhenomenaQuaternary Ammonium CompoundsCulture MediaAnimal FeedPlant RootsBiological ProductsEcosystemBiological AssayUreaGlutamate-Ammonia LigasePlant LeavesBacterial ProteinsBacteriaAmino Acid SequenceFermentationEnergy MetabolismTime FactorsBiological TherapyMutationGene Expression ProfilingSignal TransductionEatingGlucosePoaceaeMineralsEutrophicationBiological MarkersGlutamineGene Expression Regulation, BacterialNitrogen Mustard CompoundsBase Sequence