Participation of nitrogen-fixing algae in the accumulation of nitrogen in the soil.
D000864:Antarctic Regions; D001110:Arctic Regions; D002980:Climate; D000458:Cyanobacteria / Q000378:metabolism*; D005308:Fertilizers; D009586:Nitrogen Fixation; D012621:Seasons; D012988:Soil Microbiology; D013696:Temperature; D014586:USSR
D005308:Fertilizers