Atmospheric nitrogen is directly replenished in nature through
A.
the activities of denitrifying bacteria
B.
the breakdown of ammonium salts in the soil
C.
the activities of nitrifying bacteria
D.
the activities of nitrogen-fixing bacteria in root nodules
E.
egestion, death and decay
Correct Answer: Option A
Explanation
The nitrogen in the soil is converted to atmospheric nitrogen by the process of DENITRIFICATION. This is done by the action of denitrifying bacterias eg several species of Pseudomonas.
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