Soils of India

5 min

Master Alluvial, Black, Red, Laterite, and Arid Soils for competitive exams

Golden Rule of Indian Soils

Soil distribution in India is governed by relief, parent rock, and climate. Alluvial soil covers the largest area, while black soil is best for cotton.

Why Soils Matter in Exams

Alluvial soil is most fertile and covers about 43 percent of India's land area.
Black soil is known as Regur soil and exhibits self-ploughing property.
Laterite soil develops in heavy rainfall areas and is ideal for cashew and tea.

Smart Memory Hooks

Regur = Cotton = Black soil holds moisture like a sponge.
Red soil = Iron oxide richness gives it the characteristic red colour.
Laterite = Leaching due to heavy rain washes away silica.

Classification of Major Soils

Soil Type	Rich In	Major Crops
Alluvial	Potash, Lime	Wheat, Rice
Black	Iron, Magnesia	Cotton, Soybean
Red	Iron, Potash	Millets, Groundnut
Laterite	Iron, Aluminium	Tea, Coffee

Soil Profiles & Distribution

Alluvial

(Northern Plains Deposit)

Northern Plains Deposit

Brought down by Himalayan river systems.

Regur

(Deccan Trap Basalt)

Deccan Trap Basalt

Formed from weathering of lava rocks.

Laterite

(High Leaching Zone)

High Leaching Zone

Found in Western Ghats and plateau edges.

Arid

(Desert Salt Crust)

Desert Salt Crust

Sandy texture with high calcium content.

Common Exam Traps

Red soil is red due to humus.Red soil is red due to iron oxide.

Humus makes soil dark or black, while iron oxide imparts red colour.

Black soil needs heavy irrigation.Black soil retains moisture naturally.

Regur soil has high water retention capacity and develops deep cracks when dry.

Laterite soil is very fertile.Laterite soil is acidic and low in fertility.

Heavy rain washes away nutrients, making fertilization necessary for crops.

Quick Practice Quiz

Q1.Which soil is best suited for the cultivation of cotton in India?

Q2.What is the primary reason for the red color of red soils?

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