A report on Nitrogen fixation

Schematic representation of the nitrogen cycle. Abiotic nitrogen fixation has been omitted.
Nodules are visible on this broad bean root
A sectioned alder tree root nodule
Equipment for a study of nitrogen fixation by alpha rays (Fixed Nitrogen Research Laboratory, 1926)
Lightning heats the air around it breaking the bonds of starting the formation of nitrous acid.

Chemical process by which molecular nitrogen, with a strong triple covalent bond, in the air is converted into ammonia or related nitrogenous compounds, typically in soil or aquatic systems but also in industry.

- Nitrogen fixation
Schematic representation of the nitrogen cycle. Abiotic nitrogen fixation has been omitted.

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Lupinus

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Genus of flowering plants in the legume family Fabaceae.

Genus of flowering plants in the legume family Fabaceae.

Lupinus angustifolius
Canadian tiger swallowtail on wild perennial lupine, Gatineau, Quebec
Lupinus pilosus in Tel Aviv University, Israel
Russell hybrid lupin Lupinus polyphyllus, UK
Lupinus sp., Raspberry Island, Alaska, United States
Lupins in Hokkaido, Japan
Lupin cultivar "My Castle"
Ornamental lupins, Ushuaia, Argentina
Lupins at Lake Tekapo, New Zealand
Lupins at Lake Tekapo, New Zealand
Texas Bluebonnet, Texas, United States
alt=Lupins_PacificNorthwest_Washington_USA|Lupins in Pacific Northwest Washington, United States

Like other legumes, they can fix nitrogen from the atmosphere into ammonia via a rhizobium–root nodule symbiosis, fertilizing the soil for other plants.