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

Question Report Error

Which bacteria are associated with nitrogen fixation in leguminous crops?

A. Rhizobium

B. Lactobacillus

C. E.coli

D. Azotobacter only

Answer: Option A

Solution (By JKExamLibrary)

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 Report Error

Which region of India has the largest area under alluvial soil?

A. Indo-Gangetic Plains

B. Deccan Plateau

C. Western Ghats

D. Thar Desert

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Correct Answer: Option A

Explanation:
The Indo-Gangetic Plains have the largest extent of alluvial soil in India.

This question belongs to: Geography GK Soils of India

Question #2 Report Error

Which soil is commonly found in the rain-shadow region of the Deccan Plateau?

A. Forest Soil

B. Marshy Soil

C. Black Soil

D. Peaty Soil

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Correct Answer: Option C

Explanation:
The rain-shadow regions of the Deccan Plateau are dominated by black cotton soils.

This question belongs to: Geography GK Soils of India

Question #3 Report Error

Which process enriches the upper soil layer with organic matter?

A. Humification

B. Salinization

C. Leaching

D. Erosion

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Correct Answer: Option A

Explanation:
Humification is the conversion of organic matter into humus.

This question belongs to: Geography GK Soils of India

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