Biology
Grade-10
Easy
Question
The level of denitrification decreases because of
- Acidic pH
- Elevated temperatures
- Abundance of organic matter
- Availability of oxygen
Hint:
Nitrification occurs over a wide pH range in soil, although the optimal pH has been estimated to be between pH 6.5 to 8.8. Nitrification rates are slower in acid soils, and the addition of limestone to reduce soil acidity often results in more rapid nitrification.
The correct answer is: Acidic pH
- The alkaline environment strongly affects microbial denitrification.
- As the pH affects the functioning of all enzymes, it can also create an imbalance between the reduction kinetics of the four reductases of denitrification.
- Alkaline pH thus causes the accumulation of metabolic intermediates such as nitrite.
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