AnswersSC332 Environmental Science BSoil and Agriculture

Topic Test Answers

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1
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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
2
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Dutch agriculture is one of the most labor intensive types of agriculture in the world.

A
T
B
F
3

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.
4

Which of the following is the most damaging method of soil remediation?

A
soil excavation and disposal
B
soil aeration
C
heating and vapor extraction
D
microbial digestion
5

Which of the following is not a component of soil?

A
organic material
B
minerals
C
gases
D
none of the above
6

Which of the following properties of soil has the greatest effect on plant and microorganism growth?

A
soil texture
B
soil color
C
soil reaction
D
soil consistency
7

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.
8

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)
9

Soil composition is not subject to change.

A
T
B
F
10

Plants would thrive in soil void of microorganisms.

A
T
B
F
11

Salinization increases the concentration of _______ in soil.

A
plants
B
nutrients
C
salt
D
water
12

Microorganisms in soil _______.

A
are critical to soil health
B
carry out decomposition
C
make nutrients available to plants
D
all of the above
13

Which of the following is not true concerning crop rotation?

A
It reduces soil compaction by turning the soil.
B
It grows different, dissimilar crops in series.
C
It prevents the depletion of nutrients by any single crop variety.
D
It improves soil structure and fertility.
14

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
15

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

Answer:

Dutch agriculture is characterized by the growth of plants and crops in greenhouses. In greenhouses all aspects of growth can be artificially controlled, including the artificial imposition of climatic conditions and artificial growth patterns (i.e. hydroponics) and even the mechanical automation of farming.

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