What process carried out by microorganisms inon the soil that releases nitrogen back into the atmosphere?

The process carried out by microorganisms in the soil that releases nitrogen back into the atmosphere is called denitrification. During this process, certain bacteria convert nitrates (NO3-) and nitrites (NO2-) back into nitrogen gas (N2) or, to a lesser extent, nitrous oxide (N2O), which is then released into the atmosphere. This process is essential for maintaining the nitrogen cycle, helping to regulate nitrogen levels in the environment.