NCERT · Class 10 · Social Science · Geography: Resources and DevelopmentWhat is soil erosion? Describe the major types of soil erosion and suggest suitable methods for soil conservation in India.

Definition of Soil Erosion:\nThe denudation of the soil cover and subsequent washing down of topsoil by natural agents like water, wind, and human activities is called soil erosion.

Major Types of Soil Erosion:

1. Gully Erosion: When running water cuts through clayey soils, it forms deep channels called gullies. This makes the land unfit for cultivation, creating badlands (e.g., the Chambal ravines).
2. Sheet Erosion: When topsoil over a large area is washed away by flowing water down a slope, it is called sheet erosion. This removes the most fertile layer of the soil.
3. Wind Erosion: Wind blows off loose and dry soil from flat or sloping land, especially in arid and semi-arid regions.

Methods of Soil Conservation:

• Contour Ploughing: Ploughing along the contour lines slows down the flow of water down the slopes, reducing erosion.
• Terrace Farming: Cutting steps on mountain slopes creates terraces, which restrict water runoff and prevent soil erosion in hilly regions like the Western Himalayas.
• Strip Cropping: Large fields are divided into strips, and grass is left to grow between the crops to break the force of the wind.
• Shelterbelts: Planting lines of trees creates windbreaks that stabilize sand dunes and prevent desertification in arid regions.
• Afforestation and Grazing Control: Planting more trees and managing overgrazing by livestock protect the soil cover from being exposed.