A microbial process in the nitrogen cycle that involves the reduction of nitrate (NO ₃⁻ ) and nitrite (NO ₂⁻ ) in soil or water to gaseous nitrogen compounds, such as nitrogen gas (N ₂ ) or nitrous oxide (N ₂ O). This process is carried out by denitrifying bacteria, namely __________
Psudomonas denitrificans : involved in the process of liberation of N2 and N2O.