This process involves the so-called "oxygen paradox."  A diazotrophic actinomycete called "frankia" can do it, as can the blue-green algae Azolla in paddy rice.  
This process involves the so-called "oxygen paradox."  A diazotrophic actinomycete called "frankia" can do it, as can the blue-green algae Azolla in paddy rice.  Lightning does it to the tune of 10 million tons per year. Rhizobium does it in legumes.  And humans do it with the Haber-Bosch process.  FTP, what is this necessary activity, defined as the conversion of a certain atmospheric gas into compounds for plant growth, such as ammonia.
This process involves the so-called "oxygen paradox."  A diazotrophic actinomycete called "frankia" can do it, as can the blue-green algae Azolla in paddy rice.  
Nitrogen Fixation (prompt on "ammonia synthesis" if given on "Haber-Bosch")