Tag: protecting our environment

Questions Related to protecting our environment

Which of the following is not a method of preventing soil erosion?

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. Terrace farming

  2. Contour ploughing

  3. Strip cropping

  4. None of the above

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Correct Option: D
Explanation:

The prevention of soil erosion is called as soil conservation and the ways can be as follows:
Terrace farming is one way to do so and involves cutting terraces along a slope. These terraces reduce the speed of water flowing down the slope and help in soil conservation.
Contour ploughing is also beneficial in reducing the flow of water down the slope and involves ploughing at right angles to the natural slope of land.
Effective farming techniques further help in soil erosion. In plain areas, strip cropping can be used for soil conservation where strips of grass are allowed to stand between crops in large fields. These strips of grass reduce the force of wind and thus prevent soil erosion.

Planting rows of trees along farm lands

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. Causes soil erosion

  2. Break the force of wind

  3. Both A and B

  4. None of the above

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Correct Option: B
Explanation:

Planting rows of trees along farmland also help break the force of wind and help in soil conservation. Shelter belts of trees, when planted along sand dunes, help stabilise them and prevent the desert from extending into land available for cultivation.

Soil erosion can be prevented by

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. Over-gazing

  2. Removal of vegetation

  3. Afforestation

  4. Deforestation

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Correct Option: C

Soil pollution can be controlled by

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. Recovery and recycling

  2. Dumping

  3. Sludge burning

  4. All of the above

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Correct Option: D

Strip cropping is a method of

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. Water conservation

  2. Soil conservation

  3. Air pollution

  4. All of the above

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Correct Option: B
Explanation:

Effective farming techniques further help in soil erosion. In plain areas, strip cropping can be used for soil conservation where strips of grass are allowed to stand between crops in large fields. These strips of grass reduce the force of wind and thus, prevent soil erosion.

Terrace farming is a method of

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. Water conservation

  2. Soil conservation

  3. Air pollution

  4. All of the above

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Correct Option: B
Explanation:

Terrace farming is one way of soil conservation and involves cutting terraces along a slope. These terraces reduce the speed of water flowing down the slope and help in soil conservation.

Contour ploughing is a method of

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. Water conservation

  2. Soil conservation

  3. Air pollution

  4. All of the above

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Correct Option: B
Explanation:

Contour ploughing is also beneficial in reducing the flow of water down the slope and involves ploughing at right angles to the natural slope of land.

Which of the following prevents soil erosion?

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. Afforestation

  2. Eutrophication

  3. Deforestation

  4. None of the above

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Correct Option: A
Explanation:

Deforestation is the destruction of forest resources. The major effect of deforestation is the loss of precious wildlife, rare species of flora and fauna. Directly or indirectly, deforestation causes soil erosion and drought. Soil erosion can be prevented by afforestation and reforestation. Afforestation is the planting of the new forests. Plants hold soil with their roots and thus prevent erosion. Eutrophication is the process of enriching water bodies with nutrients.  It supports the abnormal growth of algae.

Thus, the correct answer is option A.

Aeration of soil can be increased by

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  1. Earthworm

  2. Domestic waste

  3. Industrial waste

  4. None of the above

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Correct Option: A
Explanation:
Earthworms increase the soil porosity by improving the soil aggregation and by creating permanent burrows. By increasing the porosity, they help in the exchange of gases with the atmosphere. They also increase the water holding capacity of soil, moisture content, soil texture and degrade pesticide residues. They decompose the organic matter and add humus to the soil. So, the correct option is A.

How can recycling materials help in reducing soil pollution?

commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

  1. It decreases the volume of refuse

  2. It increases the volume of refuse

  3. It decreases reuse

  4. It reduces natural conservation

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Correct Option: A