Soil and agriculture

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

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T

Which of the following is not an agricultural technique?
a.
irrigation
b.
selective breeding
c.
livestock herding
d.
none of the above

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D

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

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D

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

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A

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

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F

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

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B

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

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T

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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A

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.

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B

How does flooding rice fields reduce the need for herbicides and pesticides in rice farming?
a.
While rice has a submerged growth state, most weeds and pests do not.
b.
Flooding the fields causes the soil to degrade so weeds cannot take root.
c.
Residual herbicides and pesticides from previous seasons dissolve in the water.
d.
All of the above

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A

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

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F

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