Question 1

________ are soils of many widely scattered locations whose common characteristic is a lack of maturity.

Accepted Answer

A)   Aridisols
B)   Ultisols
C)   Entisols
D)   Vertisols
E)   OxisolsF) A) and D)
G) A) and B)

Question 2

Sandstone bedrock usually produces a coarse soil which is easily penetrated by water and air.

Accepted Answer

A) True 
 B)False

Question 3

The unconsolidated parent material beyond the reach of most roots is ________.

Accepted Answer

A)   the A horizon
B)   loam
C)   the C horizon
D)   solum
E)   the F horizonF) A) and C)
G) None of the above

Question 4

Air within the soil is usually highly saturated and rich in ________.

Accepted Answer

A)   oxygen
B)   argon
C)   carbon dioxide
D)   aluminum
E)   none of the aboveF) A) and B)
G) A) and C)

Question 5

A soil series is ________.

Accepted Answer

A)   the most specific level of the Soil Taxonomy
B)   limited to about 10 types worldwide
C)   usually deeper than a soil pedon
D)   the same thing as a soil order
E)   a stair-step of soil types up a hillsideF) A) and D)
G) A) and C)

Question 6

The minerals that form cations are known as ________.

Accepted Answer

A)   anions
B)   electrons
C)   bases
D)   clays
E)   loamsF) A) and E)
G) B) and D)

Question 7

Distinguish texture from structure.

Accepted Answer

Texture is the percentage of size separa...

Question 8

The size groups within the standard classification of soil particle sizes are termed ________.

Accepted Answer

A)   epipedons
B)   separates
C)   cations
D)   humus
E)   pedonsF) A) and D)
G) B) and E)

Question 9

The less the colloidal content of the soil, the greater its inherent fertility.

Accepted Answer

A) True 
 B)False

Question 10

The soil-forming factor which is said to make soil more than "just dirt" is the ________ factor.

Accepted Answer

A)   climatic
B)   biological
C)   topographic
D)   geologic
E)   chronologicalF) A) and E)
G) C) and D)

Question 11

Which of the following is NOT a property of soil clay?

Accepted Answer

A)   occurs as thin laminar sheets
B)   made primarily of silt
C)   colloidal in size
D)   Many chemical reactions occur on its surfaces.
E)   It is able to hold water to itself.F) B) and E)
G) C) and E)

Question 12

Organic matter usually comprises about ________ percent of total soil volume.

Accepted Answer

A)   5
B)   10
C)   25
D)   35
E)   95F) A) and C)
G) All of the above

Question 13

This type of water is held to soil particles by adhesion and is normally unavailable to plants.

Accepted Answer

A)   combined water
B)   hygroscopic water
C)   gravitational water
D)   capillary water
E)   meteoric waterF) A) and B)
G) A) and C)

Question 14

A dense layer, often forming in the B horizon under calcification is ________.

Accepted Answer

A)   solum
B)   regolith
C)   a hardpan
D)   a latosol
E)   vadoseF) C) and E)
G) A) and D)

Question 15

The main soil order adapted to wet-dry cycles and having clayey surfaces is ________.

Accepted Answer

A)   Entisols
B)   Mollisols
C)   Inceptisols
D)   Vertisols
E)   AridisolsF) None of the above
G) A) and B)

Question 16

The following is not an important soil microorganism:

Accepted Answer

A)   fungi
B)   bacteria
C)   algae
D)   protozoan
E)   earthwormF) A) and E)
G) A) and D)

Question 17

The soils which are red with a surface layer containing much aluminum and iron are ________.

Accepted Answer

A)   Oxisols
B)   Aridisols
C)   Spodosols
D)   Histosols
E)   UltisolsF) A) and B)
G) None of the above

Question 18

Humus eventually becomes litter.

Accepted Answer

A) True 
 B)False

Question 19

Podzols are a type of soil which evolve in the world's arid climates.

Accepted Answer

A) True 
 B)False

Question 20

________ is the soil order covering the greatest surface area on Earth.

Accepted Answer

A)   Vertisols
B)   Entisols
C)   Aridosols
D)   Mollisols
E)   SpodosolsF) A) and C)
G) B) and D)

Exam 12: Soils

Organic matter usually comprises about ________ percent of total soil volume.

Correct AnswerverifiedShow Answer

The following is not an important soil microorganism:

Correct AnswerverifiedShow Answer

A dense layer, often forming in the B horizon under calcification is ________.

Correct AnswerverifiedShow Answer

Air within the soil is usually highly saturated and rich in ________.

Correct AnswerverifiedShow Answer

Which of the following is NOT a property of soil clay?

Correct AnswerverifiedShow Answer

Podzols are a type of soil which evolve in the world's arid climates.

Correct AnswerverifiedShow Answer

The size groups within the standard classification of soil particle sizes are termed ________.

Correct AnswerverifiedShow Answer

________ are soils of many widely scattered locations whose common characteristic is a lack of maturity.

Correct AnswerverifiedShow Answer

The unconsolidated parent material beyond the reach of most roots is ________.

Correct AnswerverifiedShow Answer

This type of water is held to soil particles by adhesion and is normally unavailable to plants.

Correct AnswerverifiedShow Answer

The soils which are red with a surface layer containing much aluminum and iron are ________.

Correct AnswerverifiedShow Answer

Humus eventually becomes litter.

Correct AnswerverifiedShow Answer

Distinguish texture from structure.

Correct AnswerverifiedTexture is the percentage of size separa...View AnswerShow Answer

The minerals that form cations are known as ________.

Correct AnswerverifiedShow Answer

The main soil order adapted to wet-dry cycles and having clayey surfaces is ________.

Correct AnswerverifiedShow Answer

A soil series is ________.

Correct AnswerverifiedShow Answer

The less the colloidal content of the soil, the greater its inherent fertility.

Correct AnswerverifiedShow Answer

________ is the soil order covering the greatest surface area on Earth.

Correct AnswerverifiedShow Answer

The soil-forming factor which is said to make soil more than "just dirt" is the ________ factor.

Correct AnswerverifiedShow Answer

Sandstone bedrock usually produces a coarse soil which is easily penetrated by water and air.

Correct AnswerverifiedShow Answer

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Texture is the percentage of size separa...
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