The process of changing free nitrogen gas into a usable form of nitrogen is called?

Its The process of changing free nitrogen into a usable form of nitrogen is called

nitrogen fixation

fixation

Fixation

http://en.wikipedia.org/wiki/Nitrogen_cycle

The process of changing free nitrogen gas into a usable form of nitrogen is called nitrogen fixation. Nitrogen fixation is a natural or industrial process that converts atmospheric nitrogen gas (N2) into forms that can be utilized by living organisms, such as ammonia (NH3) or nitrate (NO3-). Nitrogen fixation is essential because nitrogen, despite being the most abundant gas in the Earth's atmosphere, cannot be directly used by most organisms in its gaseous form. Instead, it needs to be converted into other compounds that can be easily assimilated by plants and other organisms.

There are two primary methods of nitrogen fixation: biological and industrial. Biological nitrogen fixation is carried out by certain microorganisms, mainly certain species of bacteria and archaea, either independently or in a symbiotic relationship with plants. These nitrogen-fixing bacteria convert atmospheric nitrogen into ammonia through an enzyme called nitrogenase. Industrial nitrogen fixation, on the other hand, involves the production of synthetic nitrogen fertilizers through the Haber-Bosch process. This process uses high pressure and temperature to combine atmospheric nitrogen with hydrogen to produce ammonia, which is later processed into various fertilizers.

So, in summary, the process of changing free nitrogen gas into a usable form of nitrogen is called nitrogen fixation, which can occur through biological means by certain microorganisms or through industrial means using the Haber-Bosch process.