Question 1

The parent material layer of a soil is composed of weathered

Accepted Answer

A)   humus.
B)   organic detritus and roots.
C)   residual aluminum and iron.
D)   soil.
E)   rock fragments.

Question 2

Wind erosion is most likely to cause problems in

Accepted Answer

A)   forested grazing lands on high mountains.
B)   open, arid regions.
C)   fertile river bottoms with annual floods.
D)   agricultural regions in the far north.
E)   protected, arid region.

Question 3

The energy needed to process and distribute food in the US is as much as _______ times the amount that is used to actually farm the crops.

Accepted Answer

A)   0.5
B)   2
C)  3.5
D)   5
E)   8

Question 4

Which is a disadvantage of conservation tillage methods?

Accepted Answer

A)   Increased irrigation requirements.
B)   Less efficient use of fertilizer.
C)   Increased pests and weeds.
D)   Decreased crop yields.
E)   None of these are correct. C

Question 5

What is the theoretical basis of the statement that we could feed more people if we would eat grain rather than feeding it to livestock?

Accepted Answer

A)   The First Law of Thermodynamics.
B)   The Second Law of Thermodynamics.
C)   Ecofeminism.
D)   Biocentrism.
E)   Anthropocentrism. B

Question 6

Genetically modified organisms (GMOs) are made by taking bits of DNA from different sources to create desired characteristics in an organism.

Accepted Answer

A) True 
 B)False

Question 7

Sustainable farming

Accepted Answer

A)   is cheaper and safer than conventional farming.
B)   is safe, although it causes weed problems.
C)   uses fewer chemicals but more water than conventional methods.
D)   is an invention of modern agricultural research.
E)   is safer than conventional farming, but much more expensive.

Question 8

Which of the following are forms of chemical deterioration of soil?

Accepted Answer

A)   salinization and acidification
B)   waterlogging and laterization
C)   compaction and nutrient depletion
D)   pollution and waterlogging
E)   water and wind erosion

Question 9

More than 70% of all soybeans, corn, and cotton grown in the United States are genetically modified.

Accepted Answer

A) True 
 B)False

Question 10

You can participate in sustainable agriculture by

Accepted Answer

A)   buying local produce.
B)   eating lower on the food chain.
C)   participating in CSAs.
D)   eating locally lower on the food chain and participating in CSAs.

Question 11

The number of genetically modified organisms (GMOs) and the acreage devoted to growing them has decreased in the past fifteen years because of the huge number of opponents.

Accepted Answer

A) True 
 B)False

Question 12

The three crops that humans rely on for the majority of nutrients and calories are

Accepted Answer

A)   potatoes, wheat, and oats.
B)   wheat, rice, and maize.
C)   barley, oats, and rye.
D)   maize, oats, and rice.
E)   oats, beans, and barley. B

Question 13

Fifty years ago, there were several hundred varieties of wheat grown in the Middle East. Now a few of the more modern high responder varieties have replaced the indigenous species. What are the implications of this change?

Accepted Answer

A)   The productivity of wheat should continue to rise and increase the availability of food per person.
B)   Genetic resources are diminished and an epidemic of wheat disease is highly likely due to the reliance on few species.
C)   The high responder varieties will need specialized harvesting methods because they are so productive.
D)   The biodiversity of wheat species has increased because of the introduction of few hybrid species.
E)   High responder varieties require less water.

Question 14

Famines are most often serious when there is

Accepted Answer

A)   a very serious drought.
B)   no room to expand agriculture.
C)   steady population growth.
D)   drought and war together.
E)   an attempt by indigenous people to return to old traditions and lands.

Question 15

Which of these is not a benefit found with reduced tillage farming?

Accepted Answer

A)   Water conservation.
B)   Soil preservation.
C)   Increased crop yields.
D)   Soil aeration and loosening.
E)   Decreased insects and weeds.

Question 16

Methods of managing topography include all but which of the following?

Accepted Answer

A)   terracing
B)   contour plowing
C)   deep tilling
D)   strip-farming

Question 17

Contour plowing and strip farming are methods designed to

Accepted Answer

A)   prevent weed spreading.
B)   improve plowing efficiency.
C)   improve harvesting efficiency.
D)   prevent water and soil loss.
E)   make farms more attractive.

Question 18

Soil organisms usually stay __________ the soil.

Accepted Answer

A)   deep below the surface of
B)   near the middle of
C)   close to the surface of
D)   spread uniformly throughout
E)   About half stay close to the surface and the other half stay deep below the surface of the soil.

Question 19

In developed countries, the most recent increases in agricultural productivity have come from

Accepted Answer

A)   irrigation in arid areas.
B)   building up soil reserves on farms worldwide.
C)   clearing rainforests.
D)   an increase on the land being used for agriculture, especially in developed countries.
E)   new crop varieties and intensified farming.

Question 20

What is the advantage of genetically modified crops (GMOs) ?

Accepted Answer

A)   They can be designed to resist drought.
B)   They offer improved resistance to pests and diseases.
C)   They can be engineered to improve yield.
D)   They can be altered to produce vaccines.
E)   All of these are benefits to GMOs.

Exam 7: Food and Agriculture

The parent material layer of a soil is composed of weathered

Correct AnswerverifiedShow Answer

Wind erosion is most likely to cause problems in

Correct AnswerverifiedShow Answer

The energy needed to process and distribute food in the US is as much as _______ times the amount that is used to actually farm the crops.

Correct AnswerverifiedShow Answer

Which is a disadvantage of conservation tillage methods?

Correct AnswerverifiedC

What is the theoretical basis of the statement that we could feed more people if we would eat grain rather than feeding it to livestock?

Correct AnswerverifiedB

Genetically modified organisms (GMOs) are made by taking bits of DNA from different sources to create desired characteristics in an organism.

Correct AnswerverifiedShow Answer

Sustainable farming

Correct AnswerverifiedShow Answer

Which of the following are forms of chemical deterioration of soil?

Correct AnswerverifiedShow Answer

More than 70% of all soybeans, corn, and cotton grown in the United States are genetically modified.

Correct AnswerverifiedShow Answer

You can participate in sustainable agriculture by

Correct AnswerverifiedShow Answer

The number of genetically modified organisms (GMOs) and the acreage devoted to growing them has decreased in the past fifteen years because of the huge number of opponents.

Correct AnswerverifiedShow Answer

The three crops that humans rely on for the majority of nutrients and calories are

Correct AnswerverifiedB

Fifty years ago, there were several hundred varieties of wheat grown in the Middle East. Now a few of the more modern high responder varieties have replaced the indigenous species. What are the implications of this change?

Correct AnswerverifiedShow Answer

Famines are most often serious when there is

Correct AnswerverifiedShow Answer

Which of these is not a benefit found with reduced tillage farming?

Correct AnswerverifiedShow Answer

Methods of managing topography include all but which of the following?

Correct AnswerverifiedShow Answer

Contour plowing and strip farming are methods designed to

Correct AnswerverifiedShow Answer

Soil organisms usually stay __________ the soil.

Correct AnswerverifiedShow Answer

In developed countries, the most recent increases in agricultural productivity have come from

Correct AnswerverifiedShow Answer

What is the advantage of genetically modified crops (GMOs) ?

Correct AnswerverifiedShow Answer

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B

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B

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