Environmental Studies · Geography

Deforestation and Land Degradation

2,532 Questions

Deforestation and land degradation address the environmental impacts of human activities on natural ecosystems. Key areas include soil erosion, forest fires, and the consequences of overgrazing. These subjects frequently appear in the geography and environmental science sections of competitive exams.

Causes of deforestationForest fires consequencesSoil erosion factorsDesertification impactsAgroforestry benefitsReforestation advantages

Deforestation and Land Degradation Questions

Multiple choice

Soil erosion can be prevented by  

  1. afforestation

  2. overgrazing

  3. forest fire

  4. frequent floods
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 Soil erosion can be prevented by afforestation, i.e. by planting trees.

Multiple choice

Which of the following is/are the reason(s) of present problem of climate change?

  1. Industrialisation

  2. Deforestation

  3. Unscientific agricultural practices

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Industrialisation, deforestation and unscientific agricultural practices are the reasons of present problem of climate change. These three factors mainly contribute to pollution, emission of greenhouse gases and run away of fertilisers and pesticides in water bodies resulting in disturbance in weather patterns.

Multiple choice

If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest this is because.

  1. the soil of rain forest is deficient in nutrients.

  2. propagules of the trees in a rain forest have poor viability.

  3. the rain forest species are slowgrowing.

  4. exotic species invade the fertile soil of rain forest.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The rainforest soil is often of a reddish color, rather than brown. Nutrient levels in the soil are very low. This can be attributed to the clays in the rainforest soil are less chemically active and therefore less efficient at retaining nutrients and at depths of just a few centimetres below the soil surface, there is practically no organic matter at all.

Multiple choice

In natural reforestation, what is the role of human beings?

  1. They plant more and more trees.

  2. They put regular manures and fertilizers.

  3. They arrange water for trees and plants.

  4. They have no such role.

  5. They select the area where the forest has to be developed.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, it is the correct option. Reforestation can take place naturally also. If the deforested area is left undisturbed, it reestablishes itself. In natural reforestation, there is no role of human beings.

Multiple choice

Directions: For the Assertion (A) and Reason (R) given below, choose the correct alternative. Assertion (A): Proper discharge and disposal of industrial effluents can help preventing land degradation. Reason (R): Deforestation causes land degradation.

  1. A is true, R is false

  2. A is false, R is true

  3. Both A and R are true, but R is not the correct explanation of A.

  4. Both A and R are true and R is the correct explanation of A.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both A and R are true, but R is not the correct explanation of A. Both A and R present causes of land degradation.

Multiple choice

Consider the following programmes:

  1. Afforestation and development of wastelands
  2. Reforestation and replantation in existing forests
  3. Encouraging the wood substitutes and supplying other types of fuel
  4. Promotion of wide use of insecticides and pesticides to restrict the loss of forest area from degradation caused by pests and insects.

The National Forest Policy of 1988 includes

  1. 1, 2, 3 and 4

  2. 2 and 4

  3. 1, 3 and 4

  4. 1, 2 and 3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

National Forest Policy, 1988 describes the protection of forest and development of forest. It does not describe the use of insecticide and pesticide in forest areas.

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Deforestation results in which of the following?

  1. Drought

  2. Floods

  3. Soil erosion

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Forests naturally absorb water from rainfall and slowly release the water into the rivers. After deforestation, rainfall flows too quickly to the rivers, stripping the topsoil and causing erosion and flooding to occur. When these floods break the river's banks, further problems arise as the path of the river changes and further soil erosion occurs along the river's new path. Deforestation also makes an area more arid, contributing to droughts.