Which of the following soils is found in the northern plains of India?
Alluvial soil
Understanding Soils of India's Northern Plains
India has diverse soil types across its vast geography. Understanding the type of soil found in a particular region helps us learn about its agricultural potential, formation process, and characteristics. The question asks specifically about the soil type prevalent in the northern plains of India.
The northern plains are a vast and fertile region formed by the depositional work of three major river systems: the Indus, the Ganga, and the Brahmaputra, along with their tributaries. Rivers carry fine particles of silt, clay, and sand from the mountains and deposit them in the plains as they slow down. This deposited material forms the soil.
Alluvial Soil in the Northern Plains
The soil found predominantly in the northern plains is Alluvial soil. This soil is formed by the sediments brought down by rivers. It is widely distributed in the river valleys and plains and covers a large area of the northern plains of India, including Punjab, Haryana, Uttar Pradesh, Bihar, West Bengal, and parts of Rajasthan and Assam.
- Formation: Deposited by rivers.
- Composition: Contains varying proportions of sand, silt, and clay.
- Fertility: Generally very fertile due to rich mineral content, including potash, phosphoric acid, and lime, which are suitable for growing a variety of crops like wheat, rice, sugarcane, and pulses.
- Types: Can be classified into Khadar (new alluvial soil, more fertile) and Bhangar (old alluvial soil, less fertile, contains Kankar nodules).
Examining Other Soil Types
Let's briefly look at why the other options are not typically found extensively in the northern plains:
- Arid soil: Found in dry regions with high temperatures and low rainfall, such as western Rajasthan. While parts of Rajasthan are in the northern plains region, the typical soil of the plains formed by rivers is alluvial, not arid.
- Laterite soil: Developed in areas with high temperature and high rainfall, which promotes leaching. This soil is commonly found in the Western Ghats, Eastern Ghats, and parts of Karnataka, Kerala, Tamil Nadu, Maharashtra, Odisha, and Assam. These regions are distinct from the extensive northern plains.
- Black soil: Also known as Regur soil or black cotton soil, it is formed from weathered lava rocks. It is predominant in the Deccan Trap region, covering parts of Maharashtra, Madhya Pradesh, Gujarat, Andhra Pradesh, and Tamil Nadu. This region is primarily the Deccan Plateau, not the northern plains.
Comparing Soil Locations
| Soil Type | Common Location in India | Formation Process |
|---|---|---|
| Alluvial Soil | Northern Plains (Indo-Gangetic-Brahmaputra Plain), River Valleys, Coastal Plains | Deposition by rivers and streams |
| Arid Soil | Arid and Semi-Arid Regions (e.g., Western Rajasthan) | Weathering in dry conditions, low humus content |
| Laterite Soil | Areas with High Rainfall & Temperature (e.g., Western/Eastern Ghats, Meghalaya) | Intense leaching due to heavy rain |
| Black Soil | Deccan Trap Region (e.g., Maharashtra, Madhya Pradesh, Gujarat) | Weathering of volcanic rocks |
Based on the formation and distribution, Alluvial soil is the characteristic soil type of the vast northern plains of India.
Revision Table: Major Soil Types in India
| Soil Type | Key Characteristics | Crops Grown |
|---|---|---|
| Alluvial Soil | Fertile, rich in potash, varied texture (sandy to clayey) | Wheat, Rice, Sugarcane, Pulses, Oilseeds |
| Black Soil | Clayey, high moisture retention, rich in lime, iron, magnesia, alumina | Cotton, Sugarcane, Oilseeds |
| Red & Yellow Soil | Sandy to clayey loam, porous, red due to iron oxides | Groundnuts, Millets, Pulses |
| Laterite Soil | Acidic, coarse texture, poor in nutrients (except iron oxide) | Tea, Coffee, Cashew, Rubber |
| Arid Soil | Sandy texture, saline, low humus & moisture | Bajra, Pulses, Cotton (with irrigation) |
| Forest Soil | Heterogeneous, loamy & silty in valleys, coarse in upper slopes | Tea, Coffee, Spices, Tropical Fruits |
Additional Information on Alluvial Soil
Alluvial soil is one of the most important and widespread soil types in India. It constitutes about 40% of the total land area. Its fertility makes the northern plains, also known as the Indo-Gangetic Plain, one of the most agriculturally productive regions in the world, supporting a large population. The constant deposition of fresh silt during annual floods replenishes the soil's nutrients, making it suitable for intensive cultivation. The texture of alluvial soil varies depending on the region; it is more coarse (sandy) in the upper reaches of the river valleys and finer (silty or clayey) in the lower parts near the delta.
Important Questions from Soils
Which of the following is NOT a method of soil conservation?
________ is generally sandy in texture and saline in nature.
Which type of soil develops deep cracks during hot weather?
Out of the given options, which crop grows in black soil?
What is the other name for Regur soil in India?
