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Test: Soil - UPSC MCQ


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20 Questions MCQ Test - Test: Soil

Test: Soil for UPSC 2024 is part of UPSC preparation. The Test: Soil questions and answers have been prepared according to the UPSC exam syllabus.The Test: Soil MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Soil below.
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Test: Soil - Question 1

Which one is not a natural force that causes weathering of rock?

Detailed Solution for Test: Soil - Question 1

Weathering of rock takes place by action of wind, water and Glacier. Earthquake is not the natural force causing weathering.

Test: Soil - Question 2

Clay particles are of size

Detailed Solution for Test: Soil - Question 2

The soils that contain particles of size less than 0.002mm are called clayey soil. It is most suitable for rice, wheat and gram.

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Test: Soil - Question 3

‘Khadar’ is another name of

Detailed Solution for Test: Soil - Question 3

Alluvial soil is also called as Khadar in some part of India.

Test: Soil - Question 4

Coffee cultivation is best suited in

Detailed Solution for Test: Soil - Question 4

Coffee cultivation is best suited in laterite soil. Laterite soil is found in Assam and Kashmir valley.

Test: Soil - Question 5

Collective name of layers of soil is

Detailed Solution for Test: Soil - Question 5

The different layers of soil are together called soil profile. Soil profile has different layers having different sized particles.

Test: Soil - Question 6

Alluvial soil is found in

Detailed Solution for Test: Soil - Question 6

Alluvial soil is found in planes of north India that includes Bihar, Uttar Pradesh, Orissa and some part of Jharkhand.

Test: Soil - Question 7

__________ are black in colour and have a high clay content in which deep vertical cracks develops during the dry season.

Detailed Solution for Test: Soil - Question 7

The correct answer is D as ertisol clays are black when wet and become iron hard when dry. When drying, Vertisols crack and the cracks widen and deepen as the soil dries ; this produces cracks 2-3 cm wide. These are productive soils.

Test: Soil - Question 8

Removal of top layer of soil is called

Detailed Solution for Test: Soil - Question 8

The removal of top layer of soil due to action of air, water or human intervention is called soil erosion.

Test: Soil - Question 9

Cotton is grown in

Detailed Solution for Test: Soil - Question 9

Cotton is grown in Sandy loam soil that have good drainage system to support growth of cotton.

Test: Soil - Question 10

__________ should be banned to prevent soil pollution.

Detailed Solution for Test: Soil - Question 10

Plastics should be banned because plastic is non-biodegradable that causes soil pollution.

Test: Soil - Question 11

Dead and decaying material produced by plants in the soil is called

Detailed Solution for Test: Soil - Question 11

Dead and decaying materials produced by plants in the soil is called humus. Humus provides nutrients and increase water holding capacity of soil.

Test: Soil - Question 12

Which of the following statements regarding  laterite soils of India are correct?
1. They are generally red in colour.
2. They are rich in nitrogen and potash.
3. They are well-developed in Rajasthan and UP.
4. Tapioca and cashew nuts grow well on these soils.

Select the correct answer using the codes given below.

Detailed Solution for Test: Soil - Question 12

Explanation:

1. Laterite soils are generally red in color due to the presence of iron oxides. This statement is correct.

2. Laterite soils are not rich in nitrogen and potash. In fact, they are poor in nitrogen, phosphorus, and potassium, which are essential nutrients for plant growth. This statement is incorrect.

3. Laterite soils are not well-developed in Rajasthan and UP. They are mainly found in regions with high rainfall, such as the Western Ghats, Eastern Ghats, and the northeastern states of India. This statement is incorrect.

4. Tapioca and cashew nuts grow well on laterite soils because these crops can tolerate the acidic nature of these soils and do not require high levels of nutrients. This statement is correct.
 

Test: Soil - Question 13

Regar is another name of

Detailed Solution for Test: Soil - Question 13

Black soil is also called as Regar in some part of India.

Test: Soil - Question 14

Different layer of soil having characteristic feature is called

Detailed Solution for Test: Soil - Question 14

A soil profile is a vertical section through different layers of soil. Each layer has different texture, colour and chemical composition.

Test: Soil - Question 15

Which one is not an organic matter present in the soil?

Detailed Solution for Test: Soil - Question 15

Humus, Human excreta and dead plants and animals are organic matter present in soil. On the other hand, phosphate is inorganic matter.

Test: Soil - Question 16

Laterite soil is not found in

Detailed Solution for Test: Soil - Question 16

Test: Soil - Question 17

Series of layer in soil profile are called

Detailed Solution for Test: Soil - Question 17

The series of layer of soil profile each having characteristic feature is called horizon of profile.

Test: Soil - Question 18

Earthworms are called

Detailed Solution for Test: Soil - Question 18

Earthworms are called farmers friends because they make hole in soil to increase water percolation in soil. They also release organic wastes.

Test: Soil - Question 19

Latosol is the another name of

Detailed Solution for Test: Soil - Question 19

Latosols are red or yellowish-red in colour throughout and they do not have distinct horizons like a podsol. The red colour comes from the iron oxides in the soil. They are deep soils, often 20-30 m deep whereas podsols are 1-2 m deep.

Test: Soil - Question 20

Different layer of soil having characteristic feature is called

Detailed Solution for Test: Soil - Question 20

Different layer of soil having characteristic feature is called soil profile.

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