Question 1

In terms of pedogenic regimes, the process that concentrates salts in soils in climates with high evapotranspiration is

Accepted Answer

A)   laterization.
B)   salinization.
C)   calcification.
D)   podzolization.
E)   gleization.F) B) and C)
G) A) and E)

Question 2

________ are hydric soils, forming in beds of former lakes and small, poorly drained depressions.

Accepted Answer

A)   Histosols
B)   Andisols
C)   Vertisols
D)   AridisolsE) A) and B)
F) B) and D)

Question 3

Which of the following best describes the composition of soil?

Accepted Answer

A)   Soil is primarily mineral matter (approximately 72%) , but also consists of organic matter (10%) , and water (18%) .
B)   Soil consists of approximately 45% organic matter, 50% mineral matter, and 5% water and/or air.
C)   Soil is composed of about 45% mineral matter, 5% organic matter, and 50% pore space containing air and water.
D)   Soil includes pebbles, gravel, cobbles, and a varying combination of sands, silts, and clays.E) B) and C)
F) A) and D)

Question 4

Each differing and distinct mineral and organic strata within a soil column is called a horizon.

Accepted Answer

A) True 
 B)False

Question 5

In which of the following areas would one likely find Mollisols?

Accepted Answer

A)   Sub-Saharan Africa
B)   the U.S. Great Plains
C)   central Africa
D)   southeast United StatesE) B) and C)
F) B) and D)

Question 6

Why is cation-exchange capacity (CEC)  an important soil characteristic?

Accepted Answer

A)   CEC is an indication of the soil permeability; the lower the CEC the higher the permeability.
B)   CEC is a measure of soil fertility; the higher the CEC the higher the soil fertility.
C)   CEC is an indirect way to measure soil pH; it indicates whether the soil is neutral, alkaline, or acidic.
D)   CEC is used to infer soil texture without having to use a soil texture triangle.E) B) and D)
F) A) and B)

Question 7

In which of the following regions would one likely find Spodosols?

Accepted Answer

A)   savannas and grasslands
B)   tropical rainforests
C)   northern coniferous forests
D)   deserts and semiarid areasE) B) and C)
F) A) and B)

Question 8

Laterization is likely to occur

Accepted Answer

A)   in the tropics.
B)   in areas of high potential evapotranspiration rates.
C)   in humid climate regions.
D)   in areas characterized by sandy soils and coniferous forests.E) A) and B)
F) A) and C)

Question 9

What are the six main horizons found in soils? Briefly describe each.

Accepted Answer

O, A, E, B, C, and R. (Note, the text li...

Question 10

A few centimeters' thickness of prime farmland soil may require 500 years to mature.

Accepted Answer

A) True 
 B)False

Question 11

Between 1982 and 2007, soil erosion on U.S. cropland

Accepted Answer

A)   decreased by 43%.
B)   increased by 25%
C)   increased by 13%.
D)   decreased by 21%.E) A) and D)
F) B) and D)

Question 12

In terms of pedogenic regimes, the process that produces an illuviated accumulation of calcium carbonate in continental climates is

Accepted Answer

A)   laterization
B)   salinization.
C)   calcification.
D)   podzolization.
E)   gleization.F) B) and E)
G) B) and D)

Question 13

Ped formation enhances

Accepted Answer

A)   soil texture.
B)   permeability.
C)   soil horizons.
D)   plasticity.E) None of the above
F) A) and B)

Question 14

Alifols, Mollisols, and Aridisols form an east to west continuum in the north-central United States and southern Canadian prairies.

Accepted Answer

A) True 
 B)False

Question 15

Soil is a natural, renewable resource.

Accepted Answer

A) True 
 B)False

Exam 18: The Geography of Soils

Between 1982 and 2007, soil erosion on U.S. cropland

Correct Answer
verified

In terms of pedogenic regimes, the process that produces an illuviated accumulation of calcium carbonate in continental climates is

Correct Answer
verified

Alifols, Mollisols, and Aridisols form an east to west continuum in the north-central United States and southern Canadian prairies.

Correct Answer
verified

In terms of pedogenic regimes, the process that concentrates salts in soils in climates with high evapotranspiration is

Correct Answer
verified

What are the six main horizons found in soils? Briefly describe each.

Correct Answer
verified
O, A, E, B, C, and R. (Note, the text li...
View Answer

In which of the following regions would one likely find Spodosols?

Correct Answer
verified

Soil is a natural, renewable resource.

Correct Answer
verified

Laterization is likely to occur

Correct Answer
verified

________ are hydric soils, forming in beds of former lakes and small, poorly drained depressions.

Correct Answer
verified

Why is cation-exchange capacity (CEC) an important soil characteristic?

Correct Answer
verified

Ped formation enhances

Correct Answer
verified

In which of the following areas would one likely find Mollisols?

Correct Answer
verified

Each differing and distinct mineral and organic strata within a soil column is called a horizon.

Correct Answer
verified

A few centimeters' thickness of prime farmland soil may require 500 years to mature.

Correct Answer
verified

Which of the following best describes the composition of soil?

Correct Answer
verified

Exam 18: The Geography of Soils

Between 1982 and 2007, soil erosion on U.S. cropland

Correct AnswerverifiedShow Answer

In terms of pedogenic regimes, the process that produces an illuviated accumulation of calcium carbonate in continental climates is

Correct AnswerverifiedShow Answer

Alifols, Mollisols, and Aridisols form an east to west continuum in the north-central United States and southern Canadian prairies.

Correct AnswerverifiedShow Answer

In terms of pedogenic regimes, the process that concentrates salts in soils in climates with high evapotranspiration is

Correct AnswerverifiedShow Answer

What are the six main horizons found in soils? Briefly describe each.

Correct AnswerverifiedO, A, E, B, C, and R. (Note, the text li...View AnswerShow Answer

In which of the following regions would one likely find Spodosols?

Correct AnswerverifiedShow Answer

Soil is a natural, renewable resource.

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Laterization is likely to occur

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________ are hydric soils, forming in beds of former lakes and small, poorly drained depressions.

Correct AnswerverifiedShow Answer

Why is cation-exchange capacity (CEC) an important soil characteristic?

Correct AnswerverifiedShow Answer

Ped formation enhances

Correct AnswerverifiedShow Answer

In which of the following areas would one likely find Mollisols?

Correct AnswerverifiedShow Answer

Each differing and distinct mineral and organic strata within a soil column is called a horizon.

Correct AnswerverifiedShow Answer

A few centimeters' thickness of prime farmland soil may require 500 years to mature.

Correct AnswerverifiedShow Answer

Which of the following best describes the composition of soil?

Correct AnswerverifiedShow Answer

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O, A, E, B, C, and R. (Note, the text li...
View Answer

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