Soil Test

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Soil Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following field of science deals with the study of soil?

A
Entomology

B
Soil biology

C
Pedology

D
Aerobiology

Solution

Pedology is the study of soils in their natural environment.
Question 2
1 / -0

Which of the following terms describes the percentage of pore space in soil?

A
Humidity

B
Porosity

C
Water holding capacity

D
Pore capacity

Solution

Porosity refers to how many pores, or holes, a soil has.The porosity of a soil is expressed as a percentage of the total volume of the soil material.
Question 3
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Which of the following factors does not contribute in the improvement of quality of soil?

A
Manures

B
Soil organisms

C
Afforestation

D
Overgrazing

Solution

Over grazing can lead to loss of soil fertility. It does not lead to improvement of quality of soil.
Question 4
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What will be the nature of soil with pH 7?

A
Alkaline

B
Acidic

C
Neutral

D
Alluvial

Solution

A pH below 7 is acidic and above 7 is alkaline, whereas a pH of 7 is considered to be neutral.
So, a soil with pH value of 7 will be neutral in nature.
Question 5
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Select the incorrect statement from the following:

A
Humans can impact soil formation by removing vegetation.

B
Microorganisms help in increasing the soil fertility.

C
Vegetation cannot prevent soil erosion.

D
Growth of plants is affected by the density and pH of the soil.

Solution

Plant roots hold the soil in position and prevent it from being blown or washed away.
Question 6
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What type of particles is gravels?

A
Sand particles

B
Coarse particles

C
Large smooth particles

D
Clay particles

Solution

Gravel particles are coarse in nature. Gravel consists of particles with a diameter of 2 to 8 mm.
Question 7
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What does soil profile mean?

A
Types of soil

B
Salinity of soil

C
Composition of soil

D
Layers of soil

Solution

A soil horizon makes up a distinct layer of soil. The soil profile is a vertical section of soil that depicts all of its horizons.
Question 8
1 / -0

Which of the following sentences is not correct in respect to soil formation?

A
It is a very slow process.

B
Tiny rock particles are mixed with humus.

C
Rocks are broken down by the action of heat, wind and water.

D
Plant roots do not play any role in the formation of soil.

Solution

Soil formation is influenced by organisms (such as plants), micro-organisms (such as bacteria or fungi), burrowing insects, animals and humans.
Question 9
1 / -0

Which of the following factors contribute to different colours of the soil?

A
Soil erosion

B
Soil mineralogy

C
Soil biodiversity

D
Microorganism

Solution

Presence of different minerals results in different colours of the soil.

Question 10

1 / -0

Match the following:

(A) soil	(i) iron
(B) black/ brown soil	(ii) clay
(C) soil texture	(iii) electrical resistivity
(D) red soil	(iv) manganese

(A) - (ii), (B) - (i), (C) - (iii), (D) - (iv)

(A) - (i), (B) - (ii), (C) - (iii), (D) - (iv)

(A) - (i), (B) - (ii), (C) - (iv), (D) - (iii)

(A) - (iii), (B) - (iv), (C) - (ii), (D) - (i)

Solution

Correct Answer: (A) - (iii), (B) - (iv), (C) - (ii), (D) - (i)

Question 11
1 / -0

Select the correct order of size of rock particles found in the soil.

A
sand < gravel < cobble

B
gravel > cobble > sand

C
sand > cobble > gravel

D
cobble > sand > gravel

Solution

The correct order of size of rock particles found in the soil is: sand < gravel < cobble
Question 12
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Which of the following characteristics hold true for clay?

A
It is a mixture of large and small rocks.

B
It contains adequate air space.

C
It contains less humus.

D
It has a good water holding capacity.

Solution

Clay has the highest water holding capacity.
Question 13
1 / -0

Which of the following metal is present more in red soil?

A
Calcium

B
Magnesium

C
Iron oxide

D
Copper

Solution

Red colour of soil is due to the presence of iron oxide.
Question 14
1 / -0

Which of the following type of soil is also known as cotton soil?

A
Red soil

B
Black soil

C
Desert soil

D
Laterite soil

Solution

Black soil is most appropriate for growing cotton.
Question 15
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Which of the following characteristic is found mainly in laterite soil?

A
It is found in typical rainy climate.

B
It has a basic pH.

C
It contains more humus.

D
It is rich in calcium, potassium and nitrogen.

Solution

Laterite is a soil and rock type rich in iron and aluminium, and is commonly considered to have formed in hot and wet tropical areas.
Question 16
1 / -0

Which of the following factors does not cause soil pollution?

A
Dumping of plastic and glass objects

B
Use of pesticides

C
Hybridisation

D
Spraying of insecticides

Solution

Hybridisation leads to new varieties of crops; it doesn't cause soil pollution.
Question 17
1 / -0

Soil erosion can be prevented by which of the following methods?

A
Afforestation

B
Overgrazing

C
Forest fires

D
Frequent floods

Solution

Soil erosion can be prevented by afforestation, i.e. by planting more trees.
Question 18
1 / -0

How do the gravels form?

A
By the erosion of cobbles

B
By rivers

C
By erosion of rocks

D
By ocean

Solution

Large gravel deposits are a common geological feature, being formed as a result of the weathering and erosion of rocks.
Question 19
1 / -0

Which of the following is the most fertile layer of soil?

A
Top soil

B
Subsoil

C
Bedrock

D
Parent rock

Solution

Top soil is the most fertile layer of soil. It supports maximum vegetation.
Question 20
1 / -0

What should be added to soil if it is alkaline in nature?

A
Lime

B
Calcium Carbonate

C
Peat moss

D
Water

Solution

Peat moss is acidic. Hence, its addition makes the soil acidic. Therefore, it can be added to alkaline soil.

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Re-Attempt Weekly Quiz Competition

Soil Test - 1

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Soil Test - 1

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Question 1

Entomology

Soil biology

Pedology

Aerobiology

Solution

Question 2

Humidity

Porosity

Water holding capacity

Pore capacity

Solution

Question 3

Manures

Soil organisms

Afforestation

Overgrazing

Solution

Question 4

Alkaline

Acidic

Neutral

Alluvial

Solution

Question 5

Humans can impact soil formation by removing vegetation.

Microorganisms help in increasing the soil fertility.

Vegetation cannot prevent soil erosion.

Growth of plants is affected by the density and pH of the soil.

Solution

Question 6

Sand particles

Coarse particles

Large smooth particles

Clay particles

Solution

Question 7

Types of soil

Salinity of soil

Composition of soil

Layers of soil

Solution

Question 8

It is a very slow process.

Tiny rock particles are mixed with humus.

Rocks are broken down by the action of heat, wind and water.

Plant roots do not play any role in the formation of soil.

Solution

Question 9

Soil erosion

Soil mineralogy

Soil biodiversity

Microorganism

Solution

Question 10

(A) - (ii), (B) - (i), (C) - (iii), (D) - (iv)

(A) - (i), (B) - (ii), (C) - (iii), (D) - (iv)

(A) - (i), (B) - (ii), (C) - (iv), (D) - (iii)

(A) - (iii), (B) - (iv), (C) - (ii), (D) - (i)

Solution

Question 11

sand < gravel < cobble

gravel > cobble > sand

sand > cobble > gravel

cobble > sand > gravel

Solution

Question 12

It is a mixture of large and small rocks.

It contains adequate air space.

It contains less humus.

It has a good water holding capacity.

Solution