Agriculture

Different Types of Soil in India and Their Characteristics

Updated on 20th May, 2024, By Akshay Pokharkar
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Different Types of Soil in India and Their Characteristics
The soil in its present form is the result of thousands of years of weathering of the parent rocks. Depending upon the parent rock material and a region's climate, soil characteristics are determined. Accordingly, in India eight different types of soil are found with Alluvial soil covering 40% of India's land.

Table of Contents

Introduction to Soil

Soil is the most critical factor affecting the crops we grow for our consumption. It is a valuable natural resource that forms the upper layer of the earth's mantle. The soil in its present form is the result of thousands of years of weathering and gradation of parent rock material.

Soil is a thin, loose layer of different materials like rock, minerals, and organic matter, which forms over the earth's surface to support the growth of plants. Thus, the major components of soils are:

  • Organic matter – decomposed plants and animals.
  • Inorganic matter – minerals and rock debris derived from parent rocks.
  • Water
  • Air

Different types of soil contain these materials in different amounts. Some soils are abundant in one or more of these, while others may be deficient in one or more. Ideally, soil should have 50% solid material and 50% pore space. Even the pore spaces should consist of half air and half water.

Process of Soil Formation

The process of soil formation is also known as pedogenesis. The soil formation process is a series of interrelated physical, chemical, biological and climatic activities that transforms parent rock material into finer soil particles that we see today.

The soil forms through three important processes – weathering, accumulation of organic matter, and translocation.

Weathering

The first step of soil formation is weathering. It is the process of breakdown of parent rock materials through physical and chemical processes into smaller particles.

Physical weathering is the mechanical breakdown of parent rock materials into smaller material due to changes in temperatures, pressures, and wind.

Chemical weathering is the decomposition of rocks through chemical reactions. It happens when minerals within rocks change their chemical composition due to gases in the atmosphere and water.

Accumulation of Organic Matter

Organic matter consists of dead plants and animals, which upon decomposition, forms humus. This process is also known as humification.

Translocation

It involves the movement of soil constituents like minerals and organic matter within the soil profile (vertical classification of soil) or between the horizons. Translocation of soil happens through the process of leaching and illuviation.

Five Major Factors Affecting Soil Formation

Five major factors affect soil formation: physical relief, parent rock material, climate, biological activity, and time. Let's briefly examine how these factors influence soil formation.

  • Physical Relief (Topography): The shape and direction of land affect soil formation. Flat land surfaces, like Indo-Gangetic plains, have deeper fertile soils, whereas slopes have fewer deeper soils.
  • Parent Rock Material: The weathering of the parent material is the main source of soil formation. Thus, the nature of the parent rock determines the colour, composition, and fertility of the soil. For instance, black soils are the result of the weathering of lava rocks of the Deccan Plateaus.
  • Climate: Rain and temperature determine the pace with which the parent rock will break, the extent of soil development, and the composition of the soil.
  • Time: Soil formation is a dynamic and long-term process. The time determines the maturity and profile development of the soil.
  • Biological Activity: Organic matter, such as decomposed plants and animals, helps determine the soil's structure and composition. 

Besides, human activities also influence the formation of soils.

Different Types of Soil in India

Types of Soil

India has diverse landforms, climatic conditions, and vegetations. As a result, different types of soils are found in India. In ancient India, two types of soil find mention – Urvara (fertile) and Usara (infertile/sterile).

Adopting the scientific approach for soil classification after Independence, the Indian Council of Agricultural Research (ICAR) has given 8 major soil classifications based on genesis, colour, composition, and location. We have given the soil type chart of the major soils of India below.

Type of Soil

Characteristics

Region

Crops Grown

Alluvial Soil

- Formed through transportation and deposition of soils.

- Forms 40% of India’s land.

- Most fertile soils.

Indo-Gangetic region from Rajasthan to West   Bengal, and East Coast

Wheat, maize, sugarcane, pulses, millets

Black Soil

- Also called regur soils or black cotton soil.

- Formed through weathering of igneous rocks.

- Forms 15% of India’s land.

- Most mature soils and rich in magnesium and calcium.

Deccan Plateaus regions of Maharashtra, Andhra Pradesh, Karnataka, and MP

Cotton, millet, maize, pulses, citrus fruits

Red & Yellow Soil

- Formed on metamorphic and crystalline rocks.

- Due to high iron content, they appear red and turn yellow when hydrated.

- Poor in nitrogen, phosphorus, and humus.

 

Karnataka, Madhya Pradesh, Odisha, Chhattisgarh

Wheat, oilseed, tobacco, pulses

Laterite Soil

- The word laterite is derived from the Latin word ‘Later’ meaning brick.

- Accounts for 3.7% of India’s land.

- Deficient in organic matter, nitrogen, phosphate, and calcium.

- Red in colour due to the presence of iron and aluminium.

Odisha, Karnataka, Tamil Nadu, Kerala, Andhra Pradesh, Assam

Suitable for tree crops like Cashew nuts.

Arid Soil

- Also called desert soils.

- They form 4.42% of India’s land.

- They are sandy and have low moisture content.

- They have high salt content.

Western Rajasthan, Southwest Haryana, Parts of Gujarat

Bajra, jowar, green gram, black gram

Saline Soil

- Also called Usara or infertile soils.

- High presence of sodium, potassium, magnesium.

- They do not support vegetative growth.

- Adding gypsum or lime can be used to reclaim the soil.

Rann of Kutch in Gujarat, East Coast delta, Sunderbans in West Bengals

Suitable for growing leguminous crops such as green gram and beans.

Forest Soil

- They are formed in forests where rainfall is sufficient. Also called Mountain soils.

- Loamy and silty on valley sides, and coarse grained in the upper slope.

- In the Himalayas, they are acidic with low humus content but soils in lower valleys are fertile.

Himalayan region, Western Ghats, and Eastern Ghats

Temperate fruits, tea, coffee, spices.

Peaty Soil

- Rich in organic matter and humus.

- They are heavy and black in colour.

 

Found in regions of heavy rainfall and high humidity such as coastal areas of Bengal, Odisha, and Tamil Nadu.

Jute, Rice, and Rubber

 

Soil Types and its Impact on Farming in India

Soil plays a critical role in increasing agricultural productivity. That is why knowledge of soil type, texture, composition, fertility, etc., is essential. Soil type is a significant contributing factor in the high agricultural productivity of the top agri-producing states of India.

Alluvium soil, black soil, and red soil, which collectively account for over 75% of India’s land, are primarily found in specific regions. These regions include the Indo-Gangetic plains, the Deccan plateaus, and the East Coast. Interestingly, these are also the geographic areas where India’s most agriculture producing states are located.

Further, other soil types, such as arid soil, saline soil, peaty soil, forest soil, and laterite soil, are also found in these states. This additionally supports agriculture in the top agri-producing states of India.

Akshay Pokharkar
Published By
Akshay Pokharkar
Akshay holds a B.Tech in agriculture engineering from Dr Balasaheb Sawant Konkan Krishi Vidyapeeth. He is an expert in tractors and implements. With over 6 years of experience in the tractor industry, he is known to simplify even the most complex technical things. An avid YouTuber by choice, he is currently working as a Senior Content Manager.
Read More About Akshay Pokharkar


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