AnswersIC Environmental Science - DeeringTopic Test

Topic Test Answers

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61
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Soil compaction results from _______.

A
the reduction or elimination of pore space in soil
B
the weight of heavy machinery on soil
C
livestock walking over soil
D
all of the above
62
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Which of the following is defined as combinations of soil particles that vary in size and shape?

A
clay
B
aggregates
C
silt
D
loam
63

Soil is not directly important to animal life.

A
T
B
F
64

The use of which of the following is not an agricultural practice that benefits soil microorganisms?

A
crop rotation
B
monoculture
C
companion planting
D
cover crops
65

Which of the following best explains why soil conservation is important to human agriculture?

A
Erosion prevention prevents millions of dollars in damage from mudslides.
B
It is easier to prevent the degradation of old soil than it is to generate new soil.
C
If the soil salinity gets too high crops will not be able to grow in it.
D
Soil contamination is a hazard to human and animal health.
66

Healthy soil depends on _______.

A
the size of rock particles
B
oxygen content
C
moisture content
D
all of the above
67

Soil texture is determined by the amount and distribution of mineral particles.

A
T
B
F
68

There is no direct way to reduce soil compaction caused by agricultural practices.

A
T
B
F
69

Crop rotation is a method of soil conservation because _______.

A
the land produces more than one type of crop
B
it requires plowing and tilling that reduces soil compaction
C
it does not use the same parcel of land in sequential seasons
D
it avoids the depletion of soil nutrients
70

Aridisols are soils characteristically found in _______.

A
forests
B
plains
C
deserts
D
swamps
71

Why is soil important to plants?

A
It provides them with nutrients.
B
It provides them with water.
C
It provides them with a medium for growth.
D
All of the above
72

What kind of vegetation do fertile, well-developed alfisols support?

A
desert scrub
B
peat bogs and marshland
C
temperate forests
D
tropical rainforest
73

Utilizing ultisols for agriculture requires _______.

A
extensive irrigation
B
fertilizer to balance the high alkalinity of the soil
C
adding organic matter to supplement the shallow horizons
D
fertilizer to replace nutrients that leach from the soil
74

Microorganisms can improve soil health, but do not play a crucial role in it.

A
T
B
F
75

Which of the following does not contribute to soil consistence?

A
texture
B
temperature
C
organic matter
D
mineral types
76

Soil compaction can result in increased flooding in an area.

A
T
B
F

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