Nitrogen CycleManureSoilNitrogenFertilizersSoil MicrobiologyBiomassEcosystemNitrogen CompoundsNitrogen FixationNitrificationDenitrificationSoil PollutantsCell CycleAmmoniaPlanctomycetalesQuaternary Ammonium CompoundsNitrogen IsotopesCrenarchaeotaAgricultureArchaeaBacteriaNitratesNitrite ReductasesPhylogenyDNA, ArchaealNitritesNitrous OxideSeawaterGenes, ArchaealTreesGeologic SedimentsOceans and SeasRNA, Ribosomal, 16SBiodiversityOxidation-ReductionClimate ChangeMolecular Sequence DataAnimal HusbandryBlood Urea NitrogenNitrogen DioxideSequence Analysis, DNACarbonOxidoreductasesMenstrual CycleBiodegradation, EnvironmentalEnvironmental PollutionReactive Nitrogen SpeciesWaste ManagementAnimal FeedCrops, AgriculturalPlant RootsRefuse DisposalPhosphorusSoil Pollutants, RadioactiveSwineCattleCell Cycle ProteinsGenome, BacterialDairyingNitrogen OxidesLettuceDNA, RibosomalPII Nitrogen Regulatory ProteinsOdorsPoaceaeFecesDNA, Bacterial