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Natural Resources - Soil (Class - VIII)

Description: Natural Resources - Soil, Class - VIII, science,Crops
Number of Questions: 15
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Tags: Natural Resources - Soil Class - VIII science Crops Crop Production and Management
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Soil is a/an

  1. exhaustible renewable resource

  2. exhaustible non-renewable resource

  3. inexhaustible resource

  4. inexhaustible non-renewable resource


Correct Option: C
Explanation:

Soil is an inexhaustible resource.

Erosion in deserts takes place by

  1. water

  2. wind

  3. human traffic

  4. sliding


Correct Option: B
Explanation:

Erosion in deserts takes place by wind.

Erosion by landslides is more common in

  1. deserts

  2. hills

  3. rivers

  4. forests


Correct Option: B
Explanation:

Erosion by landslides is common in hills.

What kind of soil management method is lay farming?

  1. Mechanical method

  2. Biological method

  3. Agrostological method

  4. Dry farming method


Correct Option: C
Explanation:

Lay farming is a type of agrostological method.

What is the loss of upper fertile layer of soil called?

  1. Soil profile

  2. Soil erosion

  3. Stratification

  4. Soil conservation


Correct Option: B
Explanation:

The loss of upper fertile layer of soil is called soil erosion.

Protection of soil erosion by preparation of field with alternate furrows and ridges is called

  1. mulching

  2. jigsawing

  3. contour farming

  4. ploughing


Correct Option: C
Explanation:

Protection of soil erosion by preparation of field with alternate furrows and ridges is called contour farming.

A plant used in agrostological method of soil conservation is

  1. cotton stalk

  2. tobacco stalk

  3. cynodon doctylon

  4. maize stalk


Correct Option: C
Explanation:

 Cynodon doctylon is used in agrostological method of soil conservation.

How do mulch plants help in preventing erosion?

  1. By reducing run-off erosion

  2. By decreasing soil loss

  3. By checking the flow of water

  4. By reducing soil moisture evaporation


Correct Option: D
Explanation:

Mulch plants prevent  soil erosion by reducing the soil moisture evaporation.

What happens in wind strip cropping?

  1. Strips are planted parallel to each other.

  2. Strips are planted in straight parallel rows at 90 degree to the direction of prevailing land.

  3. Strips are planted along the contour at 90 degree to the direction of the slope.

  4. Strips are planted 45 degree to the direction of prevailing land.


Correct Option: B
Explanation:

Strips are planted in straight parallel rows at 90 degree to the direction of prevailing land in wind cropping.

What does contour terracing involve?

  1. Construction of small basins

  2. Construction of channels at suitable intervals

  3. Preparation of furrows and ridges in the field

  4. Planting the crops in strips


Correct Option: B
Explanation:

Contour terracing involves construction of channels at suitable intervals.

Which method of soil conservation puts a check on velocity of wind in deserts?

  1. Decreasing soil pollution

  2. Gully control

  3. Afforestation

  4. Stream bank protection


Correct Option: C
Explanation:

Afforestation puts a check on velocity of wind in deserts.

Which process would be controlled by decreased use of weedicides?

  1. Deforestation

  2. Soil pollution

  3. Contour farming

  4. Gully control


Correct Option: B
Explanation:

Decreased use of weedicides would control soil pollution.

What is the soil transported by air called?

  1. Eolian sediments

  2. Alluvial

  3. Colluvial

  4. Glacial soil


Correct Option: C
Explanation:

Soil transported by air is called colluvial soil.

A practical method to control soil erosion is

  1. increasing the population of birds

  2. building more water bodies

  3. increasing the population of plants

  4. decreasing the velocity of wind


Correct Option: C
Explanation:

Humans can increase the population of plants by afforestation and controlling soil erosion.

Which of the following is a wrong match?

  1. Basin listing-Construction of small basins

  2. Agrostological method-Cynodon

  3. Gully control-Preparation of field with alternate furrows and ridges

  4. Mulch-Potato top


Correct Option: C
Explanation:

Gully control involves formation or widening of gullies by constructing bunds, drains or diversions.

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