Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Environmental Issues

Question:

Arrange the following options in a sequential manner to demonstrate degradation caused by improper resource utilisation and maintenance.

A. Barren patches of land that become large and lead to desertification

B. Fertile top soil can be removed easily by over cultivation

C. Deposition of thin crust of salt on land surface

D. Unrestricted grazing of animals

E. Irrigation without proper drainage of water leading to water logging in the soil

Choose the correct answer from the options given below.

Options:

A, B, C, D, E

C. D. A. B. E

B, D, E, C, A

E. D. B, C, A

Correct Answer:

B, D, E, C, A

Explanation:

The correct answer is Option (3) -B, D, E, C, A

The degradation of natural resources can occur, not just by the action of pollutants but also by improper resource utilisation practices.

Soil erosion and desertification: The development of the fertile top-soil takes centuries. But, it can be removed very easily due to human activities like over-cultivation, unrestricted grazing, deforestation and poor irrigation practices, resulting in arid patches of land. When large barren patches extend and meet over time, a desert is created. Internationally, it has been recognised that desertification is a major problem nowadays, particularly due to increased urbanisation.

Waterlogging and soil salinity: Irrigation without proper drainage of water leads to waterlogging in the soil. Besides affecting the crops, waterlogging draws salt to the surface of the soil. The salt then is deposited as a thin crust on the land surface or starts collecting at the roots of the plants. This increased salt content is inimical to the growth of crops and is extremely damaging to agriculture. Waterlogging and soil salinity are some of the problems that have come in the wake of the Green Revolution.