Chemical formula for nitrite is NO 2 -. Nitrogen Cycle Model that describes the movement of nitrogen in its many forms between the hydrosphere , lithosphere , atmosphere and biosphere . Nitrogen Dioxide A gas produced by bacterial action in the soil and by high temperature combustion. Nitrogen dioxide is a component in the production of photochemical smog . Nitrogen Fixation Biological or chemical process where gaseous nitrogen is converted into solid forms of nitrogen. Biological fixation of nitrogen is done by specialized organisms like microorganisms like bacteria , actinomycetes , and cyanobacteria .
Chemical fixation occurs at high temperatures.
One natural process that can produce enough heat to fix atmospheric nitrogen is lightning . These gases are produced by bacterial action in the soil and by the high temperature combustion. Both gases are components in the production of photochemical smog . Nitrogen Saturation Overabundance of nitrogen in natural ecosystems because of human induced inputs related to agriculture and fossil fuel combustion. Nitrous Oxide Gas found in the atmosphere that contributes to the greenhouse effect .