Investigation if inorganic and organic nitrogenous compounds on microbial nitrogen fixation with respect to the fixation cycle.

The effect of inorganic and organic nitrogenous compounds on microbial nitrogen fixation with respect to the fixation cycle was investigated. Various nitrogenous compounds were added to the nutrient solution in concentrations of 2.5 mM and 5 mM. After incubation with the bacteria for fifteen days, the nitrogen and carbon contents were estimated.