Great Indian Plains Soil Characteristics
The Great Indian Plains represent one of the world's largest and most fertile stretches of land, formed by the interplay of major Himalayan rivers like the Indus, Ganges, and Brahmaputra. These plains are crucial for agriculture in India due to their rich soil composition.
Understanding Soil Types in the Plains
India hosts a variety of soil types, each with distinct characteristics influencing land use. The question asks about the soil found on a large scale in the Great Indian Plains. Let's examine the options:
Alluvial Soil Dominance
Alluvial soil is primarily formed by the deposition of silt, sand, and clay carried down by rivers over long periods. This process, known as alluviation, makes the soil extremely fertile. Key characteristics include:
- High fertility, making it ideal for agriculture.
- Texture can vary from sandy loam to clayey.
- Rich in potash but often deficient in nitrogen and humus.
- The continuous deposition by rivers ensures a renewal of its fertility.
The formation process of alluvial soil through riverine deposition makes it naturally accumulate in vast river valleys and plains, such as the Great Indian Plains.
Comparison of Soil Types in India
To understand why alluvial soil is dominant in the Great Indian Plains, let's briefly look at other major soil types and their typical locations:
| Soil Type | Key Characteristics | Primary Location in India | Presence in Great Indian Plains |
|---|---|---|---|
| Alluvial Soil | Highly fertile, rich in potash, good water retention. | Indo-Gangetic Plains, Brahmaputra Valley, Coastal Plains. | Covers vast expanses, predominantly found here. |
| Black Soil (Regur) | Clayey, deep, swells when wet, good for cotton cultivation. | Deccan Plateau, parts of Maharashtra, Gujarat, Madhya Pradesh. | Minimal presence, mainly on the southern fringes. |
| Red Soil | Reddish-brown, porous, sandy loam, low in humus and nitrogen. | Parts of Tamil Nadu, Karnataka, Andhra Pradesh, Odisha, Jharkhand. | Limited presence, not a major soil type. |
| Laterite Soil | Rich in iron and aluminium, leached due to heavy rainfall, suitable for plantations. | Southern states (Kerala, Karnataka), Odisha, Assam Hills, Meghalaya. | Essentially absent from the plains. |
As evident from the table, alluvial soil is intrinsically linked with the river systems that formed the Great Indian Plains. The extensive river networks ensure that these plains are largely covered by this fertile deposit.
Conclusion on Plains Soil
The formation processes and geographical extent clearly indicate that alluvial soil is the type of soil found on a large scale across the Great Indian Plains of India. Its fertility is the primary reason for the high agricultural productivity of this region.
Important Questions from Soils
Which of the following statements regarding Regur soil is/are correct?
1. It is a light coloured, clayey and fertile soil.
2. It is developed on Deccan basaltic lava under hot and humid conditions.
3. Cotton is extensively cultivated in this soil.
Select the answer using the code given below:
Which one of the following soils is ideal for growing cotton?
Which one of the following is an organic soil?
The term 'Regur' is used to mean;
Which of the following statements about black soil is INCORRECT?
