Question

The Rhizobium bacteria present in the root nodules of pea plants can fix one of the following from the atmosphere. This one is:
A. hydrogen
B. oxygen
C. nitrogen
D. halogen

Answer 1

Answer:

Nitrogen

Explanation:

The Rhizobium bacteria present in the root nodules of pea plants can fix nitrogen.

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Answer 2

C. nitrogen

Explanation:

The system of cultivating a leguminous crop between two cereals crops is called crop rotation. Crop rotation is very helpful for the soil because it improves the fertility of the soil by replenishing it with nitrogen and increases the production of food grains. Leguminous plants contain the Rhizobium bacteria which are present in the root nodules of the plant. These bacteria can fix atmospheric nitrogen in the soil . Thus the next crop will require less amount of nitrogen fertilizer.

Option C is the answer.