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Types of Nitrogen

Ammonification
Ammonification

The nitrogen cycle is composed of four steps: nitrogen fixation, nitrification, ammonification, and denitrification. Nitrogen Cycle During the first step of the nitrogen cycle, nitrogen fixation, you and your boyfriend (N 2) are pulled out of the air by bacteria in the soil.

source: study.com
Anaerobic Ammonia Oxidation
Anaerobic Ammonia Oxidation

Anammox, an abbreviation for anaerobic ammonium oxidation, is a globally important microbial process of the nitrogen cycle that takes place in many natural environments. The bacteria mediating this process were identified in 1999, and were a great surprise for the scientific community. "Anammox" is also the trademarked name for an anammox-based ammonium removal technology developed by the Delft University of Technology.

Assimilation
Assimilation

Nitrogen assimilation is the formation of organic nitrogen compounds like amino acids from inorganic nitrogen compounds present in the environment. Organisms like plants, fungi and certain bacteria that cannot fix nitrogen gas (N 2) depend on the ability to assimilate nitrate or ammonia for their needs.

Denitrification
Denitrification

Denitrification is a microbially facilitated process where nitrate is reduced and ultimately produces molecular nitrogen (N 2) through a series of intermediate gaseous nitrogen oxide products.

Dissimilatory Nitrate Reduction to Ammonium
Dissimilatory Nitrate Reduction to Ammonium

Dissimilatory nitrate reduction to ammonium (DNRA), also known as nitrate/nitrite ammonification, is the result of anaerobic respiration by chemoorganoheterotrophic microbes using nitrate (NO 3 −) as an electron acceptor for respiration.

Nitrification
Nitrification

Nitrification is the 2-step process of ammonia found in soil being turned into nitrates (NO3-), which are inorganic forms of nitrogen that plants can use. Let's look at this process in further detail.

source: study.com
image: youtube.com
Nitrogen Fixation
Nitrogen Fixation

Nitrogen fixation is a process by which nitrogen in the Earth's atmosphere is converted into ammonia (NH 3) or other molecules available to living organisms. Atmospheric nitrogen or molecular dinitrogen (N 2) is relatively inert: it does not easily react with other chemicals to form new compounds.

Other Processes
Other Processes

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among the atmosphere, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes.