CK12 Life Science

(Marvins-Underground-K-12) #1

Figure 24.11: The nitrogen cycle includes assimilation, or uptake of nitrogen by plants;
nitrogen-fixing bacteria that make the nitrogen available to plants in the form of nitrates;
decomposers that convert nitrogen in dead organisms into ammonium; nitrifying bacteria
that convert ammonium to nitrates; and denitrifying bacteria that convert help convert
nitrates to gaseous nitrogen. ( 14 )

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