Nitrogen is very important for the life on the earth. Over 90% of the earth's supply exists as a gas in the atmosphere. The diagram below describes the nitrogen cycle.

The diagram gives information about the nitrogen cycle. A very important is Nitrogen for the life on the earth. In the atmosphere, over 90% of the eath's exist as a gas. It can be obviously seen that the gas represents in a cycle diagram. In a rise of the diagram, we can clearly see the Gaseous nitrogen, the next is Fixation by lightning and the second point is Fixation by plants. Before all these things we are to see the Denitrification process. Earlier are Nitrate, Nitrite, Ammonium, etc. In the middle of the cycle diagram are located Decomposition and Protein. On the other hand, some processes have two ways to move. For instance, is that Nitrate, that leaves Fixation by lightning to Protein or Denitrification. The second example is Gaseous nitrogen, which goes to Fixation by lightning or Pixation by plants. It is obvious, that every process depends on the total. Any process to be coherent on the cycle diagram.