What is the primary source of humus in soil? MCQ with Answer and Explanation

What is the primary source of humus in soil?

A. Weathered Rocks

B. River Sediments

C. Volcanic Ash

D. Decayed Plants and Animals

Answer: Option D

Humus originates from decomposed organic matter such as plants and animals.

This question belongs to: Geography GK Soils of India

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Question #1 Report Error

Which soil is commonly found in Tamil Nadu, Karnataka, Andhra Pradesh, and eastern Maharashtra?

A. Red Soil

B. Mountain Soil

C. Desert Soil

D. Saline Soil

Correct Answer: Option A

Explanation:
Red soil is widespread in the southern and eastern parts of the Peninsular Plateau.

This question belongs to: Geography GK Soils of India

Question #2 Report Error

Which soil is least affected by erosion due to heavy texture?

A. Sandy soil

B. Desert soil

C. Black soil

D. Loamy soil

Correct Answer: Option C

Explanation:
Black soil is heavy and clay-rich, making it less prone to erosion.

This question belongs to: Geography GK Soils of India

Question #3 Report Error

The accumulation of organic matter is highest under:

A. Cool and Wet Conditions

B. Arid Conditions

C. Semi-desert Conditions

D. Hot and Dry Conditions

Correct Answer: Option A

Explanation:
Cool and wet conditions slow decomposition and increase organic matter accumulation.

This question belongs to: Geography GK Soils of India