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1. (n.) nitrogen cycle
the continuous sequence of natural processes by which nitrogen in the atmosphere and nitrogenous compounds in the soil are converted, as by nitrification and nitrogen fixation, into substances that can be utilized by green plants and then returned to the air and soil as a result of denitrification and plant decay.
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| Definition of 'nitrogen cycle' |
Princeton's WordNet |
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1. (noun) nitrogen cycle
the circulation of nitrogen; nitrates from the soil are absorbed by plants which are eaten by animals that die and decay returning the nitrogen back to the soil
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Definitions of nitrogen cycle 
