AnswersSC332 Environmental Science BSoil and Agriculture

Soil and Agriculture Answers

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1
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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
2
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The high productivity of American agriculture is exemplified by _______.

A
low crop yields per farm worker
B
high crop yields per farm worker
C
the small cultivated area per inhabitant
D
the small cultivated area per farmer
3

Field patterns are the same in all parts of the world.

A
T
B
F
4

Which of the following are some reasons for the variations in agricultural practices around the world?

A
topography
B
tradition
C
amount of rainfall
D
all of the above
5

The same agricultural practices are used in every country of the world.

A
T
B
F
6

Which of the following is not true concerning tropical plantations?

A
They are generally found in humid, tropical climates.
B
Wheat and corn are common products of tropical plantations.
C
Most crops from tropical plantations are exported.
D
Cocoa, coffee and tea are common products of tropical plantations.
7

Contour farming is a method for plowing across the slope of steep hills.

A
T
B
F
8

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
9

Why is Dutch agriculture critically dependent upon technology?

A
It produces almost 50% of the world supply of cut flowers and indoor plants.
B
It relies almost exclusively on genetically engineered crops.
C
Dutch agriculture is characterized by plant production in greenhouses.
D
Dutch fruit and vegetable production contributes to the global food supply.
10

The shrubs and trees in windbreaks protect soil from erosion by rain water.

A
T
B
F
11

Which of the following is not an agricultural technique?

A
irrigation
B
selective breeding
C
livestock herding
D
none of the above
12

Victory gardens were used in World Wars I and II to augment the public food supply and aid the war effort.

A
T
B
F
13

Pastoral farming is best described as _______.

A
a method of raising livestock and moving herds
B
an African method of agriculture
C
a method of cultivating crops on poor soils
D
a common method of desert farming
14

Genetically modified foods can contain genes from different, unrelated organisms.

A
T
B
F
15

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.
16

What is the purpose of strip cropping?

A
prevent soil erosion
B
maintain nutrient levels
C
reduce plant disease
D
all of the above

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