Question

Assertion (A): Washing away of the top most layer of the soil cover by running water and wind is called soil erosion.

Reason (R): Alluvial soils are fertile and suitable for cultivation of all crops.

1. Both (A) and (R) are individually true and (R) is the correct explanation of (A)
2.  Both (A) and (R) are individually true but (R) is not the correct explanation of (A)
3.  (A) is true but (R) is false
4.  (A) is false but (R) is true

Answer 1

Correct Answer - Option 2 :  Both (A) and (R) are individually true but (R) is not the correct explanation of (A)

The correct answer is  Both (A) and (R) are individually true but (R) is not the correct explanation of (A).

• Topsoil is the uppermost layer of the Earth's surface layer and it is soft and light and can be carried away easily.
• Water and wind cause the topsoil to be removed.
• This process of carrying topsoil by wind and water is called soil erosion. 
• Alluvial soil is mostly flat and regular soil, and is best suited for agriculture.
• They are best suited to irrigation and respond well to the canal and well/tube-well irrigation.
• They yield splendid crops of rice, wheat, sugarcane, tobacco, cotton, jute, maize, oilseeds, vegetables, and fruits.