Tag: soil erosion and conservation

Questions Related to soil erosion and conservation

How does seeding of areas help in reducing soil erosion?

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

  1. By allowing flow of water

  2. By collecting runoff water

  3. By avoiding water

  4. None of the above

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Correct Option: B

What prevents soil erosion?

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

  1. Allowing herbivorous animals to graze excessively

  2. Growing plants to form the soil cover

  3. Increasing fertility

  4. Making the land sloppy

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Correct Option: B
Explanation:

  • Soil erosion is the loss of the fertile soil due to an absence of plants which can hold the soil. 
  • The roots of the plants allow the soil to be held due to the presence of water. In deforestation, there is the cutting or the removal of plants. 
  • Due to which the water present in the soil gets evaporated resulting in a barren land. 
  • This barren land is prone to soil erosion which results in the loss of the upper layer of the soil.

Thus, the correct answer is option B. 

Soil erosion can be reduced by

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

  1. Grazing cattle

  2. Deforestation

  3. Using renewable resources

  4. Contour ploughing

  5. Increasing biodiversity

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Correct Option: D
Explanation:
A. Grazing cattle can promote soil erosion because as the cattle eat the vegetation, the soil particles loosen and can be easily carried away by wind, water etc.
B. Deforestation leads to soil erosion because roots of the plants held the soil particles tightly and if there will be no trees, the soil particles will be loosened and can be easily carried away by wind or water.
C. Using renewable resources has no effect on soil erosion as renewable sources are the sources that can be replenished naturally over a period of time.
D. Contour ploughing is the ploughing of land according to its contour or slope to prevent soil erosion.
E. Increasing biodiversity will promote soil erosion as more organisms will be there which will feed on vegetation and this will cause the same effect as that of grazing cattle.
Hence, soil erosion can be reduced by Contour Ploughing.
So, the correct answer is 'Contour ploughing'.

Soil erosion can be checked by

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

  1. Wind screen alone

  2. Restricted human activity

  3. Checking movement of animals

  4. Good plant cover

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Correct Option: A

Uniform soil erosion by running water is

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  1. Gully erosion

  2. Rill erosion

  3. Riparian erosion

  4. Sheet erosion

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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. 
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 downslope by water flowing overland as a sheet (instead of flowing in definite channels or rills). 

Removal of soil by the action of wind and water is known as

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

  1. Soil erosion

  2. Soil conservation

  3. Salination

  4. Calcification

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Correct Option: A
Explanation:

(a) Top soil is the vital part of the soil and serves as the chief source of nutrition for plants. Loss or disturbance of top soil by natural agents like water, wind, gravity or ice is called soil erosion.


Soil erosion is more where

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

  1. Rainfall is high

  2. No rainfall

  3. Low rainfall

  4. None of the above

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Correct Option: A
Explanation:
Soil erosion occurs when rainfall is high, because it breaks the soil aggregates causing detachment and displacement of soil particles
So, the correct option is 'Rainfall is high'

Soil transported by air is

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

  1. Alluvial

  2. Colluvial

  3. Glacial

  4. Eolian

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Correct Option: D

Sheet erosion is due to

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

  1. Fast running rivers

  2. Wind

  3. Heavy rains

  4. Occasional rains

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Correct Option: C
Explanation:

Sheet erosion is the uniform removal of soil in thin layers by the force of raindrops, heavy rain is responsible for sheet erosion.

So, the correct answer is 'Heavy rains'

In the hills, the soil erosion takes place due to rapid flow of rain water. It can be most effectively controlled by.

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

  1. Channel sing the water

  2. Terrace cultivation

  3. Jhum cultivation

  4. Building dikes

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Correct Option: A