Question

Soil erosion can be checked by

• A. Wind screen alone
• B. Restricted human activity
• C. Checking movement of animals
• D. Good plant cover

Answer 1

The correct option is D Good plant cover

Erosion can be checked in many ways. E.g. Maintaining a protective plant cover, Planting crops(grass or grains) in alternative strips can be adopted.

• Using mulch or introducing crop rotation also reduces the duration of time the bare soil is exposed.
• Contour ploughing, building terraces that intercept and stop downward movement of soil.
• Netting is a temporary form of erosion control.
• Maintaining plant cover reduces wind speed.
• Growing crops in intervals across a field of cereals, and using trees and shrubs as shelterbelts or windbreaks are also helpful.
• Taking pits at points at borders of the plot also is useful.
• Plant fencing is a conventional method.

So, the correct option is D.