Rhizobium & Azetobactor
The nitrogen cycle is an biogeochemical essential process that converts different forms of nitrogen and compounds of nitrogen into forms that can be utilized for life processes. The limiting factor is that atmospheric nitrogen (N2) is unavailable to most organisms due to the high amount of energy required to break the triple bond between the two atoms of nitrogen. Alternatively, other forms of nitrogen, such as ammonia (NH3+), is converted to soluble forms of nitrogen compounds, including nitrites and nitrates that can be utilized. The utilisation of nitrogen is a complex process that involves many different chemical reactions by different organisms.
Nitrogen fixation is the process of converting nitrogen gas to a fixed form which is a nitrogenous compound, such as ammonia (NH3) or ammonium (NH4+). The reaction generates hydrogen gas, which can be utilized to reduce molecular oxygen and generate electrons and ATP. The equation for this reaction in most nitrogen fixing organisms, such as Rhizobium and Azotobacter
