Question 1

If the soils are to be used for crop production, for which soil order would land drainage be most critical

Accepted Answer

A)  Mollisols
B)  Inceptisols
C)  Aridisols
D)  Oxisols
E)  Histosols

Question 2

Soils in which of the following suborders would be more likely to occur in Minnesota than in Texas?

Accepted Answer

A)  Fluvents
B)  Cryolls
C)  Udalfs
D)  Usterts
E)  Cambids

Question 3

Vertisols are characterized by high contents of swelling-type silicate clays.

Accepted Answer

A) True 
 B)False

Question 4

Which soil moisture regime has the highest soil moisture levels?

Accepted Answer

A)  udic
B)  ustic
C)  aquic
D)  aridic
E)  xeric

Question 5

Soils classified as Inceptisols have the least well developed profiles of those in any order in the Soil Taxonomy system.

Accepted Answer

A) True 
 B)False

Question 6

The categories of Soil Taxonomy can be listed from the broadest (first) and most specific (last) as: order, suborder, great group, subgroup, series, family.

Accepted Answer

A) True 
 B)False

Question 7

Organic matter distribution in the profile is a significant criterion for differentiating epipedons.

Accepted Answer

A) True 
 B)False

Question 8

Argillic horizons are characterized by ___.

Accepted Answer

A)  accumulation of silicate clays
B)  high level of Na+ ions
C)  high levels of iron and aluminum oxides
D)  impervious hardpan layers
E)  organic matter accumulation

Question 9

Which of the following categories of Soil Taxonomy provides the greatest specificity of soil properties?

Accepted Answer

A)  series
B)  suborder
C)  order
D)  family
E)  great group

Question 10

Spodosols are generally less acidic and less sandy than are Alfisols.

Accepted Answer

A) True 
 B)False

Question 11

Histosols generally have higher organic matter contents than Mollisols.

Accepted Answer

A) True 
 B)False

Question 12

A soil pedon is ____.

Accepted Answer

A)  a category of Soil Taxonomy
B)  a three-dimensional unit that embodies the primary characteristics of an individual soil
C)  generally larger in area than a polypedon
D)  a diagnostic subsurface horizon prominent in arid regions and in sandy parent materials.
E)  a surface horizon used to characterize soil suborders and great groups

Question 13

A polypedon or individual soil is a group of closely related pedons that conceptually approximates what in the United States is called a soil series.

Accepted Answer

A) True 
 B)False

Question 14

Investigating the soils of northern Canada on summer, you dig a soil pit easily though fairly uniform peat material until, at 75 cm deep, your shovel hits a layer that is frozen solid.Into which type of soil are you most likely digging?

Accepted Answer

A)  Histosol
B)  Cryent
C)  Fibrist
D)  Histel
E)  Cryert

Question 15

Andisols are found mostly near recently active volcanoes.

Accepted Answer

A) True 
 B)False

Question 16

Epipedons are diagnostic subsurface horizons that are one of the primary means of classifying soils in the United States.

Accepted Answer

A) True 
 B)False

Question 17

The nomenclature of Soil Taxonomy is characterized by all but which one of the following statements?

Accepted Answer

A)  Soil names (except for series level)  identifies major soil characteristics.
B)  The names of the orders all end with the letters sols.
C)  The subgroup name also tells you the great group, suborder, and order names.
D)  The names give a clear indication of the modes of genesis of the soil.
E)  The names are based on measurable properties and not on presumed modes of genesis.

Question 18

The name of a subgroup indicates the order, suborder, and great group of which it is a member.

Accepted Answer

A) True 
 B)False

Question 19

In soils of which great group would you most likely find wide surface cracks during periods of dry weather?

Accepted Answer

A)  Calciusterts
B)  Albaqualfs
C)  Argiaquolls
D)  Kandiaquults
E)  Haplustox

Question 20

In which soil orders would recent alluvium most likely be a common parent material?

Accepted Answer

A)  Ultisols
B)  Entisols
C)  Andisols
D)  Alfisols
E)  Aridisols

Exam 3: Soil Classification

Organic matter distribution in the profile is a significant criterion for differentiating epipedons.

Correct AnswerverifiedShow Answer

Epipedons are diagnostic subsurface horizons that are one of the primary means of classifying soils in the United States.

Correct AnswerverifiedShow Answer

A polypedon or individual soil is a group of closely related pedons that conceptually approximates what in the United States is called a soil series.

Correct AnswerverifiedShow Answer

Spodosols are generally less acidic and less sandy than are Alfisols.

Correct AnswerverifiedShow Answer

Which of the following categories of Soil Taxonomy provides the greatest specificity of soil properties?

Correct AnswerverifiedShow Answer

Vertisols are characterized by high contents of swelling-type silicate clays.

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A soil pedon is ____.

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In soils of which great group would you most likely find wide surface cracks during periods of dry weather?

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Histosols generally have higher organic matter contents than Mollisols.

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In which soil orders would recent alluvium most likely be a common parent material?

Correct AnswerverifiedShow Answer

The nomenclature of Soil Taxonomy is characterized by all but which one of the following statements?

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Which soil moisture regime has the highest soil moisture levels?

Correct AnswerverifiedShow Answer

Investigating the soils of northern Canada on summer, you dig a soil pit easily though fairly uniform peat material until, at 75 cm deep, your shovel hits a layer that is frozen solid.Into which type of soil are you most likely digging?

Correct AnswerverifiedShow Answer

Argillic horizons are characterized by ___.

Correct AnswerverifiedShow Answer

Soils in which of the following suborders would be more likely to occur in Minnesota than in Texas?

Correct AnswerverifiedShow Answer

The categories of Soil Taxonomy can be listed from the broadest (first) and most specific (last) as: order, suborder, great group, subgroup, series, family.

Correct AnswerverifiedShow Answer

Soils classified as Inceptisols have the least well developed profiles of those in any order in the Soil Taxonomy system.

Correct AnswerverifiedShow Answer

Andisols are found mostly near recently active volcanoes.

Correct AnswerverifiedShow Answer

If the soils are to be used for crop production, for which soil order would land drainage be most critical

Correct AnswerverifiedShow Answer

The name of a subgroup indicates the order, suborder, and great group of which it is a member.

Correct AnswerverifiedShow Answer

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