Tag: soil erosion, soil conservation and uses of soil

Questions Related to soil erosion, soil conservation and uses of soil

Soil, sand and other solids are washed into water bodies due to

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

  1. Soil Erosion

  2. Eutrophication

  3. Desertification

  4. Deforestation

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Correct Option: A

Loss of top soil is called

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

  1. Washing

  2. Erosion

  3. Corrosion

  4. Denudation

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Correct Option: B

Soil erosion is greater when 

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  1. No rain occurs

  2. Winds do not blow

  3. The rainfall is evenly distributed

  4. The rainfall is received in heavy down pour

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Correct Option: D
Explanation:

Soil erosion involves the removal of the top layer of soil which adversely affects the fertility of the soil. Heavy rainfall leads to splashing of soil. However, the majority of the soil splashed is not immediately lost from the field. Most of the splashed soil particles don't leave the field, they clog surface pores, which in turn reduces water infiltration, increases water runoff, and increases soil erosion.

So, the correct answer is option D.

Which of the following is not the function of forest? 

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

  1. It is used to make paper.

  2. Resin, gum and drugs are obtained.

  3. Controls flood.

  4. Causes soil erosion.

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Correct Option: D
Explanation:

Forests and trees make an essential contribution to food security by helping to maintain the environmental conditions needed for agricultural production. They stabilize the soil, prevent erosion, enhance the land's capacity to store water and moderate air and soil temperatures.

Therefore, the correct answer is option D.

Soil erosion can be prevented by

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

  1. Terrace farming

  2. Intensive cropping

  3. Deforestation

  4. Both A and B

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Correct Option: D
Explanation:

Soil erosion can be prevented by:
(i) Intensive cropping means growing of more crops in the same fields and not leaving them unused. If the fields remain covered with crops throughout the year, top soil will not be exposed to winds or rains. Thus, no soil erosion will occur.
(ii) In hilly regions, small fields are formed in the form of steps or terraces for cultivation of crops. Such a farming in hilly regions Is called terrace farming. This technique reduces the flow of rain water down the slopes of hills. Moreover, eroded soil from upper regions of hills gets deposited in lower terraces. In this way, soil erosion can be prevented in hilly regions.
So, the correct answer is 'Both A and B'.

Soil erosion is caused due to

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

  1. Strong winds

  2. Heavy rains

  3. Keeping the fields fallow for a long time

  4. All of the above

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Correct Option: D
Explanation:

Causes of soil erosion are:
(i) Uncovered loose soil gets eroded when it is exposed to strong winds. The winds carry away the soil particles to other places,
(ii) When rain falls on the unprotected top soil, rain water washes it down into the streams and rivers etc.
(iii) Farmers loosen the top soil of the agricultural fields either for cultivation or for removing the weeds. Sometimes due to certain reasons, these agricultural fields remain fallow (not cultivated) for a long time. Top loosened soil of these agricultural fields, thus, becomes prone to erosion by winds or rains.
So, the correct answer is 'All of the above'.

Which of the following prevents soil erosion?

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

  1. Animals

  2. Rocks

  3. Plants

  4. Mountains

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Correct Option: C
Explanation:

Plants prevents soil erosion. Plant roots firmly bind the soil in the absence of plants, soil becomes loose so it can be moved by wind and flowing water.

So the correct answer is 'plants'

The removal of land surface by water, wind or ice is known as

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

  1. Seepage

  2. Sewage

  3. Erosion

  4. None of the above

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Correct Option: C
Explanation:

When the upper layer is displaced from one area to another, the process is called soil erosion. Erosion of land is a natural process. It starts with the displacement of soil particles under the influence of natural factors like water, wind or even ice. The forceful and rapid movement of all these leads to movement of soil along with it.

Seepage is the term used for percolation of water inside the soil. Sewage means drainage facilities.
So, option C "Erosion" is the correct option

More soil erosion occurs where there is

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

  1. No rainfall

  2. Low rainfall

  3. High rainfail

  4. None of the above

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Correct Option: C
Explanation:
Soil erosion is defined as the wearing away of topsoil. Topsoil is the top layer of soil and is the most fertile because it contains the most organic, nutrient-rich materials. Therefore, this is the layer that farmers want to protect for growing their crops and ranchers want to protect for growing grasses for their cattle to graze on.
Precipitation is the most forceful factor causing erosion.
Erosion is dependent on the amount, duration, intensity and frequency of rainfall. By the action of dashing rain drops on soil, soil granules are loosened, detached and separated into fine particles. Erosion is greater where the rainfall is not only heavy, but concentrated over short periods.

Which of the following phenomena take place when the top layer of soil is exposed?

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

  1. Soil erosion

  2. Infertile soil

  3. Both A and B

  4. Good quality new soil

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Correct Option: C
Explanation:

If the top layer or soil is exposed, then it will gradually expose the lower layer of soil, which is hard and rocky in nature. This type of soil is less fertile as it contains less humus. Continued soil erosion will make the land barren or infertile.

Soil erosion is defined as the wearing away of topsoil. Topsoil is the top layer of soil and is the most fertile because it contains the most organic, nutrient-rich materials. Therefore, this is the layer that farmers want to protect for growing their crops and ranchers want to protect for growing grasses for their cattle to graze on.
In short, when top layer of soil is exposed, it results in soil erosion and infertile soil.