Question 1

Which of the following pH values represents a neutral condition?

Accepted Answer

A)  1.0
B)  5.0
C)  6.0
D)  7.0
E)  10F) None of the above
G) B) and E)

Question 2

The mineral particles in soil consist of sand,silt,and clay.

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 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  True

Question 5

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 E)
G) All of the above

Question 6

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) A) and D)
F) A) and B)

Question 7

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

Accepted Answer

A) True 
 B)False  False

Question 8

Practices that tend to increase the amount of organic matter in soils would be expected to reduce the global greenhouse effect.

Accepted Answer

A) True 
 B)False

Question 9

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 10

In humid regions most rainwater that soaks into the soil and is not used by plants eventually flows into rivers and streams.

Accepted Answer

A) True 
 B)False

Question 11

Most (usually 80% or more) of soil potassium and calcium can be found in the form of _________________.

Accepted Answer

A)  dissolved substances
B)  structural components of minerals
C)  exchangeable ions
D)  organic compoundsE) A) and C)
F) All of the above

Question 12

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) A) and C)
F) A) and B)

Question 13

Where organic matter constitutes only 1 or 2 percent of the soil by weight,it has only negligible influence on soil properties.

Accepted Answer

A) True 
 B)False

Question 14

The amount of different sizes of mineral particles in a soil defines the soil ________.

Accepted Answer

A)  structure
B)  texture
C)  pore space
D)  solution
E)  profileF) A) and B)
G) C) and 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) D) and E)
G) A) and B)

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

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 18

Soil,like concrete and steel,is a standard construction material.Its properties are well characterized and predictable so that standard building foundation designs can be used uniformly at all building sites of a given topography.

Accepted Answer

A) True 
 B)False

Question 19

While many organisms depend on the soil for nutrients and water,only a few very specialized organisms live in the soil itself.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is (are) essential plant nutrients?

Accepted Answer

A)  Cu
B)  Al
C)  Sr
D)  Pb
E)  all of the aboveF) A) and D)
G) B) and D) A

Exam 1: The Soils Around Us

Which of the following pH values represents a neutral condition?

Correct AnswerverifiedShow Answer

The mineral particles in soil consist of sand,silt,and clay.

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

Correct AnswerverifiedTrue

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedFalse

Practices that tend to increase the amount of organic matter in soils would be expected to reduce the global greenhouse effect.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In humid regions most rainwater that soaks into the soil and is not used by plants eventually flows into rivers and streams.

Correct AnswerverifiedShow Answer

Most (usually 80% or more) of soil potassium and calcium can be found in the form of _________________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Where organic matter constitutes only 1 or 2 percent of the soil by weight,it has only negligible influence on soil properties.

Correct AnswerverifiedShow Answer

The amount of different sizes of mineral particles in a soil defines the soil ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

Soil,like concrete and steel,is a standard construction material.Its properties are well characterized and predictable so that standard building foundation designs can be used uniformly at all building sites of a given topography.

Correct AnswerverifiedShow Answer

While many organisms depend on the soil for nutrients and water,only a few very specialized organisms live in the soil itself.

Correct AnswerverifiedShow Answer

Which of the following is (are) essential plant nutrients?

Correct AnswerverifiedA

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True

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False

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A