Nitrogen Cycle

The Nitrogen Cycle is the process by which nitrogen is converted between its various chemical forms, including nitrogen gas (N2), ammonia (NH3), nitrites (NO2-), and nitrates (NO3-), through biological and physical processes.

Bacteria are essential in the Nitrogen Cycle as they convert nitrogen gas into usable forms for plants (nitrogen fixation) and break down dead organic matter to release nitrogen back into the atmosphere (denitrification).

Nitrogen fixation is the process of converting nitrogen gas (N2) from the atmosphere into ammonia (NH3), which can be used by plants.

Denitrification is the process by which bacteria convert nitrates (NO3-) back into nitrogen gas (N2), releasing it into the atmosphere.

Ammonification is the process of decomposing organic matter, which releases ammonia (NH3) into the soil.

Approximately 78% of the Earth's atmosphere is composed of nitrogen gas.

The chemical formula for gaseous nitrogen is N2.

Plants obtain nitrogen primarily through the soil in the form of nitrates (NO3-) and ammonium (NH4+), which are produced by the activities of bacteria.

The Nitrogen Cycle is crucial for ecosystems as it ensures the availability of nitrogen, an essential nutrient for plant growth, which in turn supports the entire food web.

Nitrification is the process by which ammonia (NH3) is converted into nitrites (NO2-) and then into nitrates (NO3-) by bacteria.