How Do Rhizo Bacteria Assist The Nitrogen Cycle?

How Do Rhizo Bacteria Assist The Nitrogen Cycle? Rhizobacteria, through nitrogen fixation, are able to convert gaseous nitrogen (N2) to ammonia (NH3) making it an available nutrient to the host plant which can support and enhance plant growth. The host plant provides the bacteria with amino acids so they do not need to assimilate ammonia.