Nitrogen CycleSoilNitrogenFertilizersNitrogen CompoundsNitrogen FixationSoil MicrobiologyNitrificationBiomassDenitrificationEcosystemCell CyclePlanctomycetalesQuaternary Ammonium CompoundsNitrogen IsotopesCrenarchaeotaArchaeaAmmoniaSoil PollutantsNitrite ReductasesNitratesBacteriaNitritesSeawaterGenes, ArchaealDNA, ArchaealOceans and SeasNitrous OxideGeologic SedimentsPhylogenyAgricultureOxidation-ReductionClimate ChangeTreesBlood Urea NitrogenNitrogen DioxideBiodiversityMenstrual CycleRNA, Ribosomal, 16SMolecular Sequence DataOxidoreductasesReactive Nitrogen SpeciesSequence Analysis, DNACarbonCell Cycle ProteinsGenome, BacterialNitrogen OxidesPII Nitrogen Regulatory ProteinsEstrous CycleCitric Acid Cycle