NitrificationArchaeaSoilSoil MicrobiologyNitrosomonasAmmoniaSoil PollutantsDenitrificationCrenarchaeotaGenes, ArchaealNitrobacterBacteriaDNA, ArchaealNitrogenNitritesAutotrophic ProcessesBrachiariaFertilizersBradyrhizobiaceaeArchaeal ProteinsBetaproteobacteriaNitrogen CycleNitratesBioreactorsWater PurificationPhylogenyNitrogen CompoundsNitrosomonas europaeaQuaternary Ammonium CompoundsRNA, Ribosomal, 16SWaste Disposal, FluidSewageOxidation-ReductionGram-Negative Chemolithotrophic BacteriaRNA, ArchaealOxidoreductasesWaste WaterMethaneGeologic SedimentsEcosystemDenaturing Gradient Gel ElectrophoresisNitrous OxideGenome, ArchaealTreesBiological Oxygen Demand AnalysisBiodiversityMolecular Sequence DataSeawaterSequence Analysis, DNAWater MicrobiologyDNA, RibosomalProteobacteriaNitrogen IsotopesHeterotrophic ProcessesNitrosomonadaceaeFresh WaterUzbekistanManureLife Support SystemsDNA, BacterialAgriculturePoaceaeBiotaGenes, rRNAPicolinesGene Expression Regulation, ArchaealBiomassHaloferax volcaniiPlant RootsDreissenaMethanococcusNitrogen FixationSoil Pollutants, RadioactiveAerobiosisTropical ClimateSulfolobusCluster AnalysisMethanobacteriaceaeOceans and SeasAlcaligenesEuryarchaeotaWater Pollutants, ChemicalMethanosarcinaAnaerobiosisBacteroidetesSulfidesMetagenomeHydrogen-Ion ConcentrationBiodegradation, EnvironmentalRiversMethanosarcinalesMethanobacteriumAlkynesSorghumDesulfurococcaceaeMethanosarcinaceaeHalobacterialesNitrate ReductaseHaloferaxTemperature