Question 41
Nutrient CyclingWhich of the following processes does not contribute to the maintenance of the nitrogen content of the soil?
- A.Decomposition
- B.Denitrification
- C.Nitrification
- D.Nitrogen fixation
Show the answer and explanation
Answer: B (Denitrification)
Explanation
Denitrifying bacteria turn nitrates into nitrogen gas, which escapes to the air, so denitrification lowers soil nitrogen.