Why is it that nitrogen is often a limiting plant nutrient, despite the fact that the atmosphere is 80% nitrogen gas because plant can not fix nitrogen.
What is nitrogen fixation?
Nitrogen fixation is a chemical process that converts molecular nitrogen (N2) in the air, which has a strong triple covalent bond, into ammonia (NH3) or related nitrogenous chemicals.
With the exception of a few microbes, atmospheric nitrogen is molecular dinitrogen, a largely nonreactive chemical. Diazotrophy, or biological nitrogen fixation, is an important microbially driven process that transforms dinitrogen (N2) gas to ammonia (NH3) via the nitrogenase protein complex.
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