Tag: commercial studies

Questions Related to commercial studies

All the following are proper plans for increasing agricultural production except

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

  1. Expansion of irrigation facilitles

  2. Increase in application of fertilizers

  3. Mechanisation of various aspects offarming

  4. Cutting of forests to add land for cultivation

Show answer
Correct Option: D
Explanation:

Cutting of forests also called as deforestation that can provide additional area for cultivation. However, this is an incorrect plan because it leads to decrease in the number of trees. This will in turn lower rainfall and hence decrease the agricultural production. Thus the correct answer is option D.

The check-dams stop the rainwater from ______

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

  1. Flowing away

  2. Reduce soil erosion

  3. Above both options

  4. None of these

Show answer
Correct Option: C

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

Show answer
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

Show answer
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

Show answer
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

Show answer
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

Show answer
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

Show answer
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

Show answer
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

Show answer
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.