The conversion of Nitrogen to ammonia or nitrogenous compounds is called

Explanation

Nitrogen fixation is when molecular nitrogen is converted into ammonia or other nitrogenous compounds. It is part of the nitrogen cycle and is carried out naturally by certain bacteria in soil to provide plants with vital nutrients.It can also be carried out artificially in industries. Nitrification is a microbial process by which ammonia is oxidised to nitrite or nitrate. Denitrification is the microbial process of reducing nitrates and nitrite into gaseous forms of nitrogen. 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 can fix nitrogen gas (N2) depend on the ability to assimilate nitrate or ammonia for their needs.