Tag: soil erosion and conservation

Questions Related to soil erosion and conservation

Soil erosion in India occurs in almost all the littoral states but it is most serious along the coast of ____________.

general knowledge the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. Kerala

  2. Tamil Nadu

  3. Odisha

  4. Karnataka

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Correct Option: A

In India, the problem of soil erosion is associated with which of the following?
1. Terrace cultivation
2. Deforestation
3. Tropical climate
Select the correct answer using the codes given below.

general knowledge the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. 1 and 2

  2. Only 2

  3. 1 and 3

  4. 1, 2 and 3

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Correct Option: B

Soil erosion can be prevented by _________.

general knowledge the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. increasing bird population

  2. afforestation

  3. removal of vegetation

  4. overgrazing

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Correct Option: B

Which among the following within processes helps in evolution?
1. Natural selection
2. Adaptation
3. Mutation
4. Reproductive isolation

general knowledge the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. 1, 2 and 3

  2. 2, 3 and 4

  3. 2 and 3

  4. All of these

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Correct Option: D

Consider the following statements and choose the correct answer from the codes given below.
1. Soil erosion is the destruction of the upper layer of the soil by natural factors.
2. General erosion is one when there is 25% less erosion of the land soil.
3. Sheet erosion is caused when the upper fertile layer of the land is eroded by air or water.

general knowledge the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. 1 and 2

  2. 2 and 3

  3. 1 and 3

  4. All of these

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Correct Option: B

Government of India encourages the cultivation of sea buckthorn. What is the importance of this plant?
1. It helps in controlling soil erosion and in preventing desertification.
2. It is rich source of biodiesel.
3. It has nutritional value and is well adapted to live in cold areas of high altitude.
4. Its timber is of great commercial value.
Which of the statements given above is/are correct? 

general knowledge the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. Only 1

  2. 2, 3 and 4

  3. 1 and 3

  4. All of these

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Correct Option: C

Which is the main causative factor of desertification

biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. Developmental activities

  2. Tourism

  3. Overgrazing

  4. Irrigated agriculture

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Correct Option: C
Explanation:

Overgrazing is an important reason for desertification. Overgrazing denudes the soil of plant cover. Trampling by cattle decreases soil porosity. The exposed hardened soil undergoes erosion by wind and water. Wind erosion is more common, where drought conditions prevail for long periods. It causes desertification or conversion of once fertile land into desert.

Sheet erosion is caused by

biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. Sea

  2. Wind

  3. Heavy rains

  4. Glaciers

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Correct Option: C
Explanation:

Sheet erosion means removal of extremely thin layer or sheet of soil. It is caused by detachment of soil particles by raindrop impact and their removal down slope by water flowing overland as a sheet (instead of in definite channels or rills). 

Loss of upper fertile layer of soil is known as

biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. Pedogenesis

  2. Podosolization

  3. Soil erosion

  4. None of the above

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Correct Option: C
Explanation:

Soil erosion is removal of top soil by agency of water (water erosion) and wind (wind erosion). Soil erosion is of two types- natural and anthropogenic. 

Natural or geological erosion is extremely slow removal of top soil due to rain water or wind. 
Anthropogenic soil erosion is caused by removal of plant cover through over grazing, litter collection, tree felling, leaving the soil unprotected during agricultural operations.
Pedogenesis is the process of soil formation.
Podsol is base poor acidic soil formed by leaching of basic minerals. The process of formation of podsol is called as podsolization.

Soil erosion is greater when

biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

  1. There is no rain

  2. The rainfall is low

  3. Winds do not blow

  4. The rainfall is received in heavy downpour

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Correct Option: D
Explanation:

Soil erosion is removal of top soil by agency of water (water erosion) and wind (wind erosion). Soil erosion is of two types- natural and anthropogenic. 

Natural or geological erosion is extremely slow removal of top soil due to rain water or wind. 
Anthropogenic soil erosion is caused by removal of plant cover through over grazing, litter collection, tree felling, leaving the soil unprotected during agricultural operations. 
Anthropogenic factors remove green cover and expose the soil to natural agents of soil erosion i.e., water and wind. When rains fall as heavy downpour, most of the top layer of soil is washed away, if the soil is not covered by vegetation.