Evaluation of nitrogen fixation by bacteria in association with roots of tropical grasses.
D001419:Bacteria / Q000378:metabolism*; D004463:Ecology; D006859:Hydrogen / Q000378:metabolism; D009586:Nitrogen Fixation; D009591:Nitrogenase / Q000378:metabolism; D010100:Oxygen / Q000502:physiology; D010788:Photosynthesis; D006109:Poaceae / Q000382:microbiology*
D006859:Hydrogen; D009591:Nitrogenase; D010100:Oxygen