Question

What are the classifications of desertification based on productivity reduction?

1. A reduction in productivity between 10% and 25% is considered severe desertification.
2. Desertification is classified as moderate if productivity reduction is between 10% and 25%.
3. A productivity reduction exceeding 50% is termed very severe desertification.
4. Severe desertification occurs when productivity decreases by more than 50%.

• A. ii, iii
• B. ii only
• C. All
• D. ii, iv

Answer 1

Answer:

A. ii, iii

• Desertification is defined as the march of the desert into neighbouring areas in old days, but today it is used more broadly to include a number of processes which lead to decline in the productive potential of land in arid and semi- arid areas.

• Desertification is said to be moderate if reduction in productivity is between10% and 25%, severe if it is between 25% and 50%, and very severe if it is more than 50%.

• Great Green Wall movement was started in the Sahel region along the southern edge of the Sahara to combat the problem of desertification Initiated in 2007.