Question

Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas ($N_{2}$) to the atmosphere.

• A. Aerobic nitrate oxidation and nitrite reduction.
• B. Anaerobic ammonium oxidation and denitrification.
• C. Decomposition of organic nitrogen and conversion of dinitrogen to ammonium compounds
• D. Enteric fermentation in cattle and nitrogen fixation by Rhizobium in root nodules of legumes

Answer 1

Answer: (B)

Anaerobic ammonium oxidation and denitrification.