Which process converts plant residues into dark organic matter? MCQ with Answer and Explanation

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Which process converts plant residues into dark organic matter?

A. Leaching

B. Calcification

C. Salinization

D. Humification

Answer: Option D

Solution (By JKSSB Mock Tests)

Humification is the formation of humus from decomposed organic residues.

This question belongs to: Geography GK Soils of India

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Question #1

Which soil is found in Himalayan valleys?

A. Mountain soil

B. Desert soil

C. Red soil

D. Black soil

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Correct Answer: Option A

Explanation:
Mountain soil is found in Himalayan valleys and varies with altitude.

This question belongs to: Geography GK Soils of India

Question #2

Which soil horizon is the parent rock layer?

A. O-horizon

B. C-horizon

C. B-horizon

D. A-horizon

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Correct Answer: Option B

Explanation:
C-horizon consists of weathered parent material beneath the soil layers.

This question belongs to: Geography GK Soils of India

Question #3

Which type of soil is ideal for the cultivation of sunflower?

A. Saline Soil

B. Marshy Soil

C. Black Soil

D. Peaty Soil

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Correct Answer: Option C

Explanation:
Sunflower grows well in black soils due to their moisture retention and nutrient availability.

This question belongs to: Geography GK Soils of India

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