nitrogen cyclenitrogen cycle
The definition of nitrogen cycle is the process in which nitrogen changes into various forms.
An example of nitrogen cycle is organic nitrogen being released when an animal dies and bacteria turning the nitrogen into ammonium.
the cycle of natural processes through which atmospheric nitrogen is converted by nitrogen fixation and nitrification into compounds used by plants and animals in the formation of proteins and is eventually returned by decay and denitrification to its original state
The circulation of nitrogen in nature, consisting of a cycle of chemical reactions in which nitrogen from the atmosphere is fixed in compounds in soil or water, assimilated by plants and animals, released to the soil and water through decomposition, and returned to the atmosphere through denitrification.