question_answer

The denitrification means                  [DPMT 1990; CPMT 2003]

A)            Reduction of \[N{{O}_{2}}\] to ammonia form by bacteria in the soil

B)            Oxidation of ammonia to nitrate form

C)            Conversion of ammonia to amino acids

D)            Conversion of ammonia and nitrates to gaseous nitrogen in the soil