Process of nitrogen cycle

1. Nitrifying bacteria are present in soil that convert ammonium ions into nitrates 2. Nitrogen fixing bacteria take in/convert nitrogen gas into ammonium ions via lightning. - Plants absorb the nitrates and form amino acids, and then protein - Animals then feed on the proteins and digest them - Then, deamination takes place where the nitrogen containing part of amino acids are broken down and converted to urea, then to be excreted as urine. - Denitrifying bacteria are present in soil, they will break down nitrogen gas and return nitrogen to the atmosphere. - The cycle repeats