Question 1

A, B, C, and E horizons can be found in any true soil.

Accepted Answer

A) True 
 B)False

Question 2

If supplied with a suitable nutrient solution, plants can grow normally without any soil at all.

Accepted Answer

A) True 
 B)False

Question 3

The dark brown and black humus found in many soils does not mix well with clay minerals so there is very little contact between these two soil components.

Accepted Answer

A) True 
 B)False

Question 4

Most, if not all, of the nutrient supply stored in a fertile soil is in forms readily available to plants.

Accepted Answer

A) True 
 B)False

Question 5

Most of the water flowing in rivers passed through a soil profile or over soil surfaces before reaching the river.

Accepted Answer

A) True 
 B)False

Question 6

Soil air usually has a higher carbon dioxide content than the air in the atmosphere.

Accepted Answer

A) True 
 B)False

Question 7

Natural soils (as opposed to modern farm soils) can recycle organic compounds, but not inorganic elements.

Accepted Answer

A) True 
 B)False

Question 8

Except for some kinds of foods, modern industry has made human dependence on soils a thing of the past.

Accepted Answer

A) True 
 B)False

Question 9

Hydroxyl ion concentrations are greatest in a soil solution with a pH value of ______.

Accepted Answer

A)   0.1
B)   4.0
C)   5.0
D)   6.5E) B) and D)
F) All of the above

Question 10

A soil profile consists of _________.

Accepted Answer

A)   the sum of chemical and physical data known about a soil
B)   the way a soil "feels"
C)   the spatial boundaries of a particular soil
D)   the set of layers seen in a vertical cross Section of a soil
E)   the general outline of a soil or group of soils when viewed from the sideF) D) and E)
G) A) and C)

Question 11

Plants can be grown without any soil.

Accepted Answer

A) True 
 B)False

Question 12

Although subsoil is more difficult to obtain, it is generally equally as good as topsoil for landscaping purposes.

Accepted Answer

A) True 
 B)False  False

Question 13

The water in the soil typically differs from pure water because the soil water ________. 5

Accepted Answer

A)   contains organic compounds
B)   contains mineral nutrients
C)   is restrained in its flow by attraction to particle surfaces
D)   all of the above
E)   none of the aboveF) A) and B)
G) A) and C)

Question 14

In a load of 10 cubic meters of topsoil, approximately how cubic meters of the volume would be solid material?

Accepted Answer

A)   1
B)   2.5
C)   4
D)   5
E)   7.5F) A) and C)
G) B) and E) D

Question 15

Which of the following is considered to be a plant macronutrient?

Accepted Answer

A)   N
B)   P
C)   S
D)   Ca
E)   all of the aboveF) C) and D)
G) All of the above E

Question 16

For any soil in which it is present, the C horizon is the parent material for the B horizon.

Accepted Answer

A) True 
 B)False

Question 17

"Subsoil" is generally equivalent to which soil horizon?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   EF) None of the above
G) C) and E)

Question 18

The layers of contrasting material found when one digs a hole in the ground are called _______.

Accepted Answer

A)   pseudoliths
B)   regoliths
C)   pedons
D)   horizons
E)   soil structureF) C) and D)
G) A) and C)

Question 19

Information about conditions at 2 to 4 meters deep in a soil is usually most helpful for understanding___.

Accepted Answer

A)   how best to design a building foundation
B)   the diversity of animal life in the soil.
C)   the proper classification of the soil.
D)   fertility requirements of most cropsE) None of the above
F) All of the above

Question 20

Soil horizons, like alluvial sediments, generally have a horizontal orientation, regardless of the slope of the land.

Accepted Answer

A) True 
 B)False

Exam 1: The Soils Around Us

A, B, C, and E horizons can be found in any true soil.

Correct AnswerverifiedShow Answer

If supplied with a suitable nutrient solution, plants can grow normally without any soil at all.

Correct AnswerverifiedShow Answer

The dark brown and black humus found in many soils does not mix well with clay minerals so there is very little contact between these two soil components.

Correct AnswerverifiedShow Answer

Most, if not all, of the nutrient supply stored in a fertile soil is in forms readily available to plants.

Correct AnswerverifiedShow Answer

Most of the water flowing in rivers passed through a soil profile or over soil surfaces before reaching the river.

Correct AnswerverifiedShow Answer

Soil air usually has a higher carbon dioxide content than the air in the atmosphere.

Correct AnswerverifiedShow Answer

Natural soils (as opposed to modern farm soils) can recycle organic compounds, but not inorganic elements.

Correct AnswerverifiedShow Answer

Except for some kinds of foods, modern industry has made human dependence on soils a thing of the past.

Correct AnswerverifiedShow Answer

Hydroxyl ion concentrations are greatest in a soil solution with a pH value of ______.

Correct AnswerverifiedShow Answer

A soil profile consists of _________.

Correct AnswerverifiedShow Answer

Plants can be grown without any soil.

Correct AnswerverifiedShow Answer

Although subsoil is more difficult to obtain, it is generally equally as good as topsoil for landscaping purposes.

Correct AnswerverifiedFalse

The water in the soil typically differs from pure water because the soil water ________. 5

Correct AnswerverifiedShow Answer

In a load of 10 cubic meters of topsoil, approximately how cubic meters of the volume would be solid material?

Correct AnswerverifiedD

Which of the following is considered to be a plant macronutrient?

Correct AnswerverifiedE

For any soil in which it is present, the C horizon is the parent material for the B horizon.

Correct AnswerverifiedShow Answer

"Subsoil" is generally equivalent to which soil horizon?

Correct AnswerverifiedShow Answer

The layers of contrasting material found when one digs a hole in the ground are called _______.

Correct AnswerverifiedShow Answer

Information about conditions at 2 to 4 meters deep in a soil is usually most helpful for understanding___.

Correct AnswerverifiedShow Answer

Soil horizons, like alluvial sediments, generally have a horizontal orientation, regardless of the slope of the land.

Correct AnswerverifiedShow Answer

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False

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D

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E

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