Standard Article

Nitrogen Fixation

  1. Robert H Burris

Published Online: 11 MAR 2004

DOI: 10.1038/npg.els.0000626



How to Cite

Burris, R. H. 2004. Nitrogen Fixation. eLS. .

Author Information

  1. University of Wisconsin-Madison, Madison, Wisconsin, USA

Publication History

  1. Published Online: 11 MAR 2004


Nitrogen fixation is the process by which nitrogen in the atmosphere is converted into a more active form that can be used by plants. Symbiotic biological nitrogen fixation occurs in leguminous and nonleguminous plants, and nitrogen is also fixed biologically by free-living and associative nitrogen fixers.


  • fixation;
  • mechanism;
  • microorganisms;
  • nodulation;
  • control