Nitrogen CycleSoilNitrogenFertilizersBiomassSoil MicrobiologyEcosystemCell CycleNitrogen CompoundsNitrogen FixationNitrificationDenitrificationSoil PollutantsPlanctomycetalesQuaternary Ammonium CompoundsNitrogen IsotopesCrenarchaeotaArchaeaAmmoniaNitrite ReductasesMenstrual CycleBacteriaNitratesNitritesPhylogenySeawaterAgricultureGenes, ArchaealTreesDNA, ArchaealNitrous OxideGeologic SedimentsOceans and SeasOxidation-ReductionCell Cycle ProteinsClimate ChangeBiodiversityMolecular Sequence DataRNA, Ribosomal, 16SBlood Urea NitrogenNitrogen DioxideEstrous CycleOxidoreductasesCitric Acid CycleSequence Analysis, DNACarbonReactive Nitrogen SpeciesSoil Pollutants, RadioactivePlant RootsGenome, BacterialNitrogen OxidesCell Cycle CheckpointsBiodegradation, EnvironmentalPII Nitrogen Regulatory Proteins