Putrefying bacteria
Putrefying bacteria are bacteria involved in putrefaction of living matter. Putrefying bacteria is one of the main processes in the nitrogen cycle; other than putrefying bacteria there are denitrifying bacteria, nitrifying bacteria and nitrogen-fixing bacteria.
Nitrefying bacteria turn nitrogen into nitrates this way it is more useful to animal which use it to create amino acids for proteins for things such as growth.
Denitrefying bacteria are the opposite; they are found in rotting matter and released back into the atmosphere.
Nitrogen-fixation basically include nitrogen-fixing bacteria on root nodules, lightning and the haber process.
Nodules are found on some plant roots and they absorb nitrates from the nitrogen-fixing bacteria on its surface, which convert nitrogen and oxygen in air into nitrate.
Lightning creates nitrates because the lightning has enough energy to split nitrogen's atoms to produce nitrates of oxide and then it is washed into the soil by rain.
The haber process is mainly used to make fertilisers for the plants to help them grow. Nitrogen in the amino group can be taken from one organism to another when its protein is consumed.
Putrefying bacteria turn nitrogen proteins into ammonium compounds. Nitrifying bacteria turn the ammonium compounds into nitrites and then into nitrates for plant absorption.