Chapter 13

Question 1

When biodiversity is considered, the concept of richness refers to the distribution or relative abundance of the individuals of a species.

Answer 1

False

Question 2

Increased biodiversity is generally desirable in an agroecosystem.

Answer 2

True

Question 3

Continuous cropping is the planned sequence of different crops grown over years on the same land.

Answer 3

False

Question 4

A 2-year rotation is generally adequate to control pests.

Answer 4

False

Question 5

By cropping corn continuously, producers can expect 10 percent yield gains over corn in rotation.

Answer 5

False

Question 6

The nitrogen from legumes can provide enough nutrition for a subsequent corn crop.

Answer 6

True

Question 7

Corn and soybean are crops that tend to be grown in monocultures.

Answer 7

True

Question 8

Polyculture systems are easier to manage than monoculture systems.

Answer 8

False

Question 9

Hay mixtures using species such as alfalfa and grasses are an example of mixed intercropping.

Answer 9

True

Question 10

Living mulches have only been used to a limited extent due to management challenges.

Answer 10

True

Question 11

Multiple cropping is often practiced in areas with short growing seasons.

Answer 11

False

Question 12

Green manures can be used as a substitute for synthetic fertilizers.

Answer 12

True

Question 13

One way to diversify the landscape is through conservation plantings.

Answer 13

True

Question 14

Farmers who have CRP plantings receive a one-time payment for enrollment.

Answer 14

False

Question 15

Studies have not shown a positive environmental impact as a result of the CRP program.

Answer 15

False

Question 16

A common example of a 2-year rotation in the Midwest is:
A. alfalfa-soybean
B. corn-soybean
C. corn-corn
D. alfalfa-red clover

Answer 16

B. corn-soybean

Question 17

A common companion crop to alfalfa is:
A. sugar beet
B. corn
C. soybean
D. oats

Answer 17

D. oats

Question 18

Growing two or more crops together in the same place during a growing season is called: 
A. continuous cropping
B. monoculture
C. polyculture
D. crop rotation

Answer 18

C. polyculture

Question 19

The agroforestry system where trees are grown in rows with an annual or perennial crop between is called:
A. multiple cropping
B. contour strip cropping
C. continuous cropping
D. alley cropping

Answer 19

D. alley cropping

Question 20

The polyculture system where annual grain crops are planted into a suppressed perennial sod is:
A. living mulch
B. strip cropping
C. contour strip cropping
D. alley cropping

Answer 20

A. living mulch

Question 21

An example of a double-crop system that would be grown in a state such as Illinois is:
A. wheat planted in fall with corn planted in spring
B. barley planted in fall with wheat planted in spring
C. wheat planted in fall with barley planted in spring
D. soybean planted in fall with corn planted in spring

Answer 21

D. soybean planted in fall with corn planted in spring

Question 22

The type of multiple cropping system where a crop si planted (but not for harvesting) during or following the cash crop is:
A. living mulch
B. cover cropping
C. alley cropping
D. conservation planting

Answer 22

B. cover cropping

Question 23

A common crop grown in rotation with cotton is:
A. peanut
B. sugar beet.
C. rye
D. potato

Answer 23

A. peanut

Question 24

Cover crops are killed using which method?
A. herbicides
B. rolling
C. mowing
D. all answers are correct

Answer 24

D. all answers are correct

Question 25

Which of the following crops is known to have allelopathic effects?
A. corn
B. barley
C. rye
D. wheat

Answer 25

C. rye

Question 26

What percentage of the Corn Belt is planted with corn and soybean?
A. 50 percent
B. 75 percent
C. 85 percent
D. 95 percent

Answer 26

D. 95 percent

Question 27

Which is a type of agroforestry system that combines trees with pastures for livestock utilization?
A. silvopasture
B. alley cropping
C. continuous cropping
D. cover cropping

Answer 27

A. silvopasture