Tag: evs

Questions Related to evs

_______________ is the degradation of land in arid, semi-arid and dry sub-humid areas.

evs mud and stones soil types types of soil soil - types, uses and need for conservation

  1. Land fertility

  2. Desertification

  3. Ecosystem

  4. Vegetation

Show answer
Correct Option: B

What is the size of clay particles?

evs mud and stones soil types types of soil soil - types, uses and need for conservation

  1. 0.2 to 0.03 mm

  2. 1 to 2 mm

  3. Less than 0.002 mm

  4. 2.0 - 0.06 mm

Show answer
Correct Option: C
Explanation:

Relative size of sand, silt and clay particles. Soil is made up of different-sized particles. Sand particles tend to be the biggest. 

Clay particles are very small less than 0.002 mm. Clay is a fine-grained natural rock or soil material that combines one or more clay minerals with traces of metal oxides and organic matter. 

The least porous soil among the following is 

evs mud and stones soil types types of soil soil - types, uses and need for conservation

  1. Loamy soil

  2. Clay soil

  3. Sandy soil

  4. Peaty soil

Show answer
Correct Option: B
Explanation:

Clay and silt soils tend to stick together, not allowing water and air to penetrate soil structure. They have poor soil porosity and do not let water drain. Aeration is poor and many plants decline and die in these non-porous, waterlogged soils. Poor porosity facilitates erosion of soils as rainwater washes particles off the surface rather than penetrating into soil. 

Therefore, the correct answer is option B.

Which of the following soils are rich in humus?

evs mud and stones soil types types of soil soil - types, uses and need for conservation

  1. Sandy soil

  2. Loamy soil

  3. Clayey soil

  4. Both A and B

Show answer
Correct Option: C
Explanation:

Clay soil particles are very small in size and packed tightly, water does not drain quickly, clayey soil is not well aerated and retains more water. Humus can easily mix or packed with clayey because of small particles also maintain the moisture in the soil and makes it more fertile. Thus, the answer is C.

Which of the following crops are grown in loamy soil?

evs mud and stones soil types types of soil soil - types, uses and need for conservation

  1. Cereals

  2. Pulses

  3. Vegetable

  4. All of the above

Show answer
Correct Option: B
Explanation:

Loamy soil is a mixture of various soil types. It has sand, silt and clay particles together. It has large air spaces inside it that allow free movement of air and water through it. 

Thee spaces also allow the roots to penetrate deep in the soil. Apart from this, it also contains the necessary minerals for proper growth and development.
So, option B "Pulses' is the correct answer.

.......... and .......... soils are suitable for growing cereals like wheat and gram.

evs mud and stones soil types types of soil soil - types, uses and need for conservation

  1. Clayey and Loamy

  2. Sandy and Clayey

  3. Sandy and Loamy

  4. Silt and Sandy

Show answer
Correct Option: A

The least porous soil among the following is.

evs mud and stones soil types types of soil soil - types, uses and need for conservation

  1. Sandy soil

  2. Clayey soil

  3. Loamy soil

  4. Gravel soil

Show answer
Correct Option: B

Which of the following can hold maximum amount of water?

evs mud and stones soil types types of soil soil - types, uses and need for conservation

  1. Gravel

  2. Sand

  3. Clay

  4. Silt

Show answer
Correct Option: C
Explanation:

Clay soil is soil that contains a high percentage of clay particles. It is slow to drain water and quick to harden holding the maximum amount of water and hence causing waterlogging. It blocks root absorption, which prevents plants from getting nutrients required for survival. Thus the correct answer is option C.

Which of the following is best suited for growing plants?

evs mud and stones soil types types of soil soil - types, uses and need for conservation

  1. Sandy soil

  2. Clayey soil

  3. Loamy soil

  4. All of these

Show answer
Correct Option: C
Explanation:

Loamy soil is the healthiest soil as it is a combination of minerals, rock, water and organic matter. Hence the soil contains microorganisms, insects, and worms that replenish soil fertility. Thus the correct answer is option C.

......... are both suitable for growing cereals like wheat and gram.

evs mud and stones soil types types of soil soil - types, uses and need for conservation

  1. Clayey soils

  2. Loamy soils

  3. A and B

  4. None of the above

Show answer
Correct Option: C
Explanation:

Clayey and Loamy both the soils have the right capacity to hold the water, and are suitable for growing cereals like wheat and lentils. When clayey soil mix with humus it becomes more fertile as it creates more space to hold water and air. Thus, the correct option is C.