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nav arrowHome nav arrowResearch nav arrowWhy study nodulation and nitrogen fixation?
Why Study

Why study nodulation and nitrogen fixation?

Crown nodulation of soybean following inoculation with Bradyrhizobium
  • N2 fixation is the second most important biological process on earth
  • ~ 175 MT N2 is fixed globally each year, accounting for almost 50% of all the N used in agriculture
  • Crop legumes can fix 100-200 kg N ha-1 yr-2, but rates are often lower, and in bean and soybean in the U.S. appear to be declining
  • In natural environments such as prairies, N2 fixation can be the principal source of N
  • Commonly a more economic, sustainable and environmentally friendly form of N supply
 

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Last modified on August 24, 2005

College of Agricultural, Food and Environmental Sciences