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Definition
| the circulation of nitrogen and its compounds by living organisms in the nature |
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Definition
| a large group of one-celled microscopie organisms concerned /in the process of nitrogen fixation |
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Term
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Definition
| any plant in the pea family that can absord nitrogen through the air and convert it into nitrates by means of bacteria present in nodules (symbiosis on the roots (rhizon=mes examples include soybeans and clovers |
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Term
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Definition
| nitrogen in a combined form |
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Term
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Definition
| N or N2 nitrogen not chemically combined in a moleule with other elements |
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Term
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Definition
| nh3 compound from animal urea |
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