Which bacteria are associated with nitrogen fixation in leguminous crops? MCQ with Answer and Explanation

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Which bacteria are associated with nitrogen fixation in leguminous crops?

A. E.coli

B. Azotobacter only

C. Lactobacillus

D. Rhizobium

Answer: Option D

Solution (By JKSSB Mock Tests)

Rhizobium bacteria live in root nodules and convert atmospheric nitrogen into usable forms.

This question belongs to: Geography GK Soils of India

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Question #1

Which soil is ideal for plantation crops like tea in Assam?

A. Laterite soil

B. Alluvial soil

C. Desert soil

D. Black soil

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Correct Answer: Option B

Explanation:
Alluvial soil in Assam valley supports tea cultivation due to fertility and moisture.

This question belongs to: Geography GK Soils of India

Question #2

Which soil is formed due to deposition in lakes?

A. Laterite Soil

B. Aeolian Soil

C. Lacustrine Soil

D. Residual Soil

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Correct Answer: Option C

Explanation:
Lacustrine soils are formed by sediments deposited in lake basins.

This question belongs to: Geography GK Soils of India

Question #3

Which soil is commonly associated with tea gardens in Darjeeling?

A. Black Soil

B. Desert Soil

C. Mountain Soil

D. Saline Soil

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Correct Answer: Option C

Explanation:
Darjeeling tea is cultivated on mountain soils found in the Himalayan region.

This question belongs to: Geography GK Soils of India

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