Environmental Studies · Geography

Soil Science

1,499 Questions

Soil Science examines the formation, classification, and properties of soil as a critical natural resource. This hub offers practice questions covering soil horizons, soil types like laterite and black soil, and regional soil characteristics. The content is highly useful for agriculture exams and civil services preparation.

Soil typesSoil horizonsSoil formation factorsAgricultural soil requirementsIndian soilsForest and mountain soils

Soil Science Questions

Multiple choice evs soil : our life soil profile soil- our life soil and crops

In which one of the following pairs, is the specific characteristic of a soil not correctly matched?

  1. Chernozems - Richest soil in the world.

  2. Black soil - Rich in calcium carbonate and iron.

  3. Laterite - Contains aluminium compound.

  4. Terra rossa - Most suitable for roses.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chernozem is the black colored soil which is known for being rich in humus. This is the richest soil in the world and used for the cultivation of the cereals. Black soil is rich in calcium carbonate and iron. This soil also contains the lime, potash, aluminum, etc. Laterite soil contains the bauxite which is the ore of the aluminum. Terra Rossa is the red clayey soil. the soil formed from the limestone and is used for the production of the vine plants. 

Thus, the correct answer is option D. 

Multiple choice evs soil : our life soil profile soil- our life soil and crops

Which is not correctly matched ___________________.

  1. Laterite - Contains aluminium

  2. Terra rosa - Most suitable for roses

  3. Chernozen - Richest soil

  4. Black Cotton Soil - Rich in calcium carbonate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Terra rosa is a reddish clay soil produced by the weathering of limestone, not specifically a soil for roses. The other matches are standard geographical definitions.

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

Which of the following is the correct order of increasing size of the grains of soil particles?
A. Clay
B. Silt
C. Sand
D. Gravel

  1. B, C, A, D

  2. D, C, A, B

  3. A, B, C, D

  4. C, D. B, A
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The correct order of the increasing size of soil particle is-

Clay is the finest of all the particles then slit which has slightly larger particles than clay. Sand has bigger particles and gravel has the largest particle size.
Show the correct option is 'A, B, C, D'

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

The least porous soil among the following is 

  1. Loamy soil

  2. Clay soil

  3. Sandy soil

  4. Peaty soil
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Which of the following soils are rich in humus?

  1. Sandy soil

  2. Loamy soil

  3. Clayey soil

  4. Both A and B
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Which of the following can hold maximum amount of water?

  1. Gravel

  2. Sand

  3. Clay

  4. Silt
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Which of the following is best suited for growing plants?

  1. Sandy soil

  2. Clayey soil

  3. Loamy soil

  4. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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

  1. Clayey soils

  2. Loamy soils

  3. A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
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.
Multiple choice evs mud and stones soil types types of soil soil - types, uses and need for conservation

Loamy soil is a mixture of .......... known as silt.

  1. Sand

  2. Clay

  3. Another type of soil particle

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Loamy soil is a mixture of sand, clay and small types of other soil particles and the soil formed are known as silt. It is basically deposited on river beds. It is good for the growth of plants. Thus, the correct answer is D.

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

Percolation rate is highest in which of the following soil?

  1. Humus

  2. Clay soil

  3. Loamy Soil

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In humus, the percolation speed is very high. This means that more amount of substances are able to pass through it. Percolation rate is basically the rate at which the water moves through granular material. In humus, water moves very quickly. As a result, its percolation rate is very high.

So, option A is the correct answer.

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


Which of the following soil drains water easily?

  1. Loamy

  2. Clay

  3. Sandy

  4. Top soil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sandy soil is made of sand particles that are rough in texture. This prevents them from sticking tightly together. The space between sand particles is large for water to flow through it. Hence sandy soil drains faster than other types of soil. Thus the correct answer is option C.