AP BIOLOGY

Detailed explanation-1: -Here, Atmospheric nitrogen (N2) which is primarily available in an inert form, is converted into the usable form-ammonia (NH3). During the process of Nitrogen fixation, the inert form of nitrogen gas is deposited into soils from the atmosphere and surface waters, mainly through precipitation.

Detailed explanation-2: -This process is called nitrification. Compounds such as nitrate, nitrite, ammonia and ammonium can be taken up from soils by plants and then used in the formation of plant and animal proteins.

Detailed explanation-3: -Denitrification. Denitrification is the process that converts nitrate to nitrogen gas, thus removing bioavailable nitrogen and returning it to the atmosphere.

Detailed explanation-4: -nitrogen fixation, any natural or industrial process that causes free nitrogen (N2), which is a relatively inert gas plentiful in air, to combine chemically with other elements to form more-reactive nitrogen compounds such as ammonia, nitrates, or nitrites.

Detailed explanation-5: -Nitrogen fixation is the processes by which atmospheric N2 is converted to any N compound where N has a nonzero oxidation state. Historically, the most common process has been the biologically driven reduction of N2 to NH3 or NH4+.