title: [Study of the activity of nonsymbiotic nitrogen fixation in rice field soils using 15N2].
mesh_terms: D009586:Nitrogen Fixation; D009587:Nitrogen Isotopes; D012275:Oryza; D012988:Soil Microbiology; D014586:USSR
chemical_list: D009587:Nitrogen Isotopes
vernacular_title: Izuchenie aktivnosti nesimbioticheskoĭ azotfiksatsii v pochvykh poleĭ pri pomoshchi 15N2.