Q.

What is the role of nitrogen-fixing bacteria in soil? 

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a

To decrease soil acidity

b

To increase soil acidity

c

To decrease soil fertility

d

To increase soil fertility

answer is A.

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Detailed Solution

Nitrogen-fixing bacteria are important for increasing soil fertility by converting atmospheric nitrogen gas into a form that plants can use. This helps to increase the amount of nitrogen available for plant growth, which in turn can improve soil health and crop yields. Additionally, some nitrogen-fixing bacteria also help to improve soil structure and reduce erosion.

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What is the role of nitrogen-fixing bacteria in soil?