The only forms of nitrogen compounds that living things can make use of are ammonia compounds and nitrate compounds.These are called "fixed nitrogen".
Animals obtain the nitrogen they need from proteins in the plants and/or animals they eat. Proteins are amino acid polymers and amino acids are built around an ammonia group.
Plants cannot use atmospheric nitrogen. Only bacteria can fix atmospheric nitrogen.
lightning, and nitrogen fixing bacteria break down organisms and create pneumonia and relaese it into the air and soil, where plants take it in.
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Bacteria and Lighting
lightning & bacterial action (nitrogen fixers).
Some essential nitrogen compounds can be absorbed by plants from the soil in which they grow. the nitrogen compounds can be provided to the soil by nitrogen-fixing bacteria living in association with the plants and/or from fertilizers. Some nitrogen compounds can also be input to the soil from lightning strikes that provide activation energy to facilitate the reaction of atmospheric nitrogen to produce absorbable nitrogen compounds that can be carried into soil by rain.
oxygen and dioxide
Humans impact the nitrogen cycle by making fertilizers and burning fossil fuels, which alter the amount of fixed nitrogen our ecosystems.
Bacteria and Lighting
Two major ways whereby nitrogen is fixed in ecosystems are through rainfall and through leguminous crops.
lightning & bacterial action (nitrogen fixers).
The short answer is yes. I am not sure about the amount but there are only two ways nature converts N2 into a form of nitrogen that is usable by plants. The two ways are microorganisms and lightning. I believe bacteria are the main nitrogen fixers, but there might also be some algae that convert nitrogen as well. We have also mastered fixing N2, the process is the Haber- Bosh process.
Amino acids, proteins and DNA.
Some essential nitrogen compounds can be absorbed by plants from the soil in which they grow. the nitrogen compounds can be provided to the soil by nitrogen-fixing bacteria living in association with the plants and/or from fertilizers. Some nitrogen compounds can also be input to the soil from lightning strikes that provide activation energy to facilitate the reaction of atmospheric nitrogen to produce absorbable nitrogen compounds that can be carried into soil by rain.
oxygen and dioxide
plants and animals
Humans impact the nitrogen cycle by making fertilizers and burning fossil fuels, which alter the amount of fixed nitrogen our ecosystems.
lightning & bacterial action (nitrogen fixers).
By lightening and by nitrogen fixing bacteria in the roots of certain plants (eg the legumes).
Blood meal or fall time cover crop such as clover