The diagram illustrates the nitrogen cycle in the nature.

The diagram illustrates the nitrogen cycle in nature. In general, there are several stages involving various processes like denitrification and fixation. At first, as animals become dead, their bodies are disintegrated into a myriad of compounds, including ammonium. Under the ground, the ammonium is next turned into nitrite, then nitrate. The substance is subsequently spilled into 2 paths. The first way leads to plants, which are consumed by living creatures. Meanwhile, in the second one, nitrate exits the ground and undergoes denitrification in order to become atmospheric nitrogen. Afterward, the nitrogen is fixated in 2 ways: lightning and plants. Being affected by airborne electricity, the nitrogen is transformed into nitrate that moves underground, repeating the outer cycle. Similarly, since nitrogen is absorbed by plants, a secondary source of ammonium is formed, contributing to the ammonium coming from the deteriorated animal bodies to complete the whole cycle. It is worth mentioning that the cycle is sustainable in terms of nitrogen-related chemicals production as long as the species remain engaged.