Topic Test Answers

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21
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Why is volcanic soil (andisol) very fertile?

A
It is rich in minerals from volcanic deposits.
B
It is a young soil with low water retention.
C
It has been leached of mineral nutrients.
D
Volcanic activity warms the soil.
22
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Plants would thrive in soil void of microorganisms.

A
T
B
F
23

Which of the following is not a component of soil?

A
organic material
B
minerals
C
gases
D
none of the above
24

Soil composition is not subject to change.

A
T
B
F
25

Dutch agriculture is one of the most labor intensive types of agriculture in the world.

A
T
B
F
26

How do organic farming practices relate to soil health?

A
Organic farmers rely on soil health for good crop production.
B
Organic farmers rely on the interaction between soil microbes and organic matter.
C
Organic farmers avoid the use of pesticides and chemicals.
D
all of the above
27

Why might soils rich in organic matter not be fertile?

A
Soil fertility comes from a balance of organic matter and other mineral nutrients.
B
Large amounts of organic material make soil retain too little water.
C
Soil fertility is a result of the inorganic minerals present.
D
Soils rich in organic material are always highly fertile.
28

Which layer of soil is least likely to be penetrated by plant roots?

A
O (organic matter)
B
A (topsoil)
C
B (subsoil)
D
C (parent rock)
29

Which of the following is a way that climate affects soil formation?

A
increased precipitation
B
warmer temperatures
C
increased winds
D
all of the above
30

Which of the following is not a method for addressing soil contamination?

A
Excavate and dispose of the soil.
B
Use microbes to digest the contaminants.
C
Use heat to force the contaminants into the gas phase and out of the soil.
D
None of the above
31

How does soil become enriched during soil formation?

A
by weathering
B
through erosion
C
by decaying organisms
D
all of the above
32

Explain how soil is important to animal life.

Answer not available
33

Explain why the produce from tropical plantations are profitable to the local communities that grow them, but not as profitable as finished goods.

Answer not available
34

Which of the following is the designation for bedrock?

A
O
B
A
C
R
D
C
35

Explain how plant life is benefited when microorganisms release carbon dioxide into the soil.

Answer not available
36

Explain how Dutch agriculture uses technology to fully control the growing environment of crops.

Answer not available
37

Explain what contributes to topsoil formation and how topsoil is important to plant growth.

Answer not available
38

Microorganisms in soil _______.

A
are critical to soil health
B
carry out decomposition
C
make nutrients available to plants
D
all of the above
39

What is the distinction between soil structure and soil texture?

Answer not available

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