nitrogen fixation

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nitrogen fixation

n.
1. The conversion of atmospheric nitrogen into compounds, such as ammonia, by natural agencies or various industrial processes.
2. The conversion by certain soil microorganisms, such as rhizobia, of atmospheric nitrogen into compounds that plants and other organisms can assimilate.

ni′tro·gen-fix′er (-fĭk′sər) n.
ni′tro·gen-fix′ing adj.

nitrogen fixation

n
1. (Biology) the conversion of atmospheric nitrogen into nitrogen compounds by certain bacteria, such as Rhizobium in the root nodules of legumes
2. (Chemistry) a process, such as the Haber process, in which atmospheric nitrogen is converted into a nitrogen compound, used esp for the manufacture of fertilizer
ˈnitrogen-ˌfixing adj

ni′trogen fixa`tion


n.
1. any process of combining atmospheric nitrogen with other elements, as used in the preparation of fertilizers and industrial products.
2. this process as performed by bacteria found in the nodules of leguminous plants, thereby making nitrogenous compounds available to the host plants.
[1890–95]

nitrogen fixation

The process by which free nitrogen from the air is combined with other elements to form organic compounds that plants can use as nutrients. Cyanobacteria and certain other forms of bacteria, especially those that live in the roots of legumes, convert gaseous nitrogen into organic compounds.

nitrogen fixation

The conversion of nitrogen gas to nitrates by some bacteria.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.nitrogen fixation - the assimilation of atmospheric nitrogen by soil bacteria and its release for plant use on the death of the bacterianitrogen fixation - the assimilation of atmospheric nitrogen by soil bacteria and its release for plant use on the death of the bacteria
biological process, organic process - a process occurring in living organisms
References in periodicals archive ?
If you want a nitrogen-fixer for heavy feeding plants in summer, crimson clover is a great option for early spring planting, as it can take late frosts and cold snaps.
LUNCH COSTS Finding the nitrogen-fixer genes and conferring the ability to fix nitrogen on non-bean crops seems "very likely in the long term," says Bogusz.
The only exceptions to this were the nitrogen-fixer and bare treatments, in which detectable concentrations of nitrate continued to leach until March and April, respectively [ILLUSTRATION FOR FIGURE 6C OMITTED].
For example, erythrina, a tree with a straight, slim trunk, is used as a living post to support bean vines; it is also a nitrogen-fixer, contributing to the fertility of the soil.
Another nitrogen-fixer, peas are great for gardeners who can't wait until the frost is gone to start planting.