title: [Role of nonsymbiotic nitrogen fixers in the nitrogen balance of soils].
mesh_terms: D009586:Nitrogen Fixation; D012621:Seasons; D012988:Soil Microbiology; D013559:Symbiosis; D013997:Time Factors
vernacular_title: Rol' nesimbioticheskikh azotfiksatoroov v azotnom balanse pochv.