Question 1

The smallest-sized pieces of a soil are ________.

Accepted Answer

A)   sands
B)   gravels
C)   clays
D)   silts
E)   cobbles

Question 2

Earthworms ________.

Accepted Answer

A)   are underneath almost all Earth's unfrozen last surface
B)   excrete casts
C)   are also known as bacteria
D)   usually deplete soil fertility
E)   have many more species than insects

Question 3

Acid soils deprive plants of nutrients by the process of leaching.

Accepted Answer

A) True 
 B)False

Question 4

Parent material is closely associated with which soil-forming factor?

Accepted Answer

A)   geologic
B)   climatic
C)   topographic
D)   chronological
E)   biological

Question 5

A soil with a large percentage of clay would be ________ and ________.

Accepted Answer

A)   porous, permeable
B)   non-porous, non-permeable
C)   porous, non-permeable
D)   non-porous, permeable
E)   fertile, red in color

Question 6

Three-quarters of the soil's metabolic activity is generated by ________.

Accepted Answer

A)   earthworms
B)   trees
C)   mammals
D)   microorganisms
E)   humans

Question 7

Ultisols generally lack ________.

Accepted Answer

A)   clay
B)   iron
C)   humus
D)   aluminum
E)   phosphorus

Question 8

Soils are considered part of the ________.

Accepted Answer

A)   lithosphere
B)   hydrosphere
C)   geosphere
D)   atmosphere
E)   biosphere

Question 9

Seeds germinate mainly in the ________ horizon.

Accepted Answer

A)   A
B)   B
C)   C
D)   E
E)   R

Question 10

The B horizon is usually called ________.

Accepted Answer

A)   regolith
B)   litter
C)   colloids
D)   topsoil
E)   subsoil

Question 11

An Alfisol is most closely related to ________.

Accepted Answer

A)   an Andisol
B)   the tropical desert
C)   heavy weathering
D)   the tundra
E)   transitional environments

Question 12

Laterization represents the most rapid cycling of nutrients of all soil-forming processes.

Accepted Answer

A) True 
 B)False

Question 13

Write a paragraph explaining the important properties of oxisols.

Accepted Answer

Most heavily weathered soils o...

Question 14

The true soil layer is known as ________.

Accepted Answer

A)   loam
B)   an oxisol
C)   the solum
D)   the interstices
E)   the regolith

Question 15

A dark color is a sure indication that the soil is fertile.

Accepted Answer

A) True 
 B)False

Question 16

The measure of acidity/alkalinity in soils is based on the relative concentration of active hydrogen ions.

Accepted Answer

A) True 
 B)False

Question 17

The process of eluviation in soils is the same thing as leaching.

Accepted Answer

A) True 
 B)False

Question 18

Shale regolith produces coarse-textured soil and limits soil development.

Accepted Answer

A) True 
 B)False

Question 19

The processes that deepen and age soils include all but the following:

Accepted Answer

A)   translocation
B)   addition
C)   transformation
D)   loss
E)   taxonomy

Question 20

This soil order is developed from volcanic ash.

Accepted Answer

A)   Aridisols
B)   Andisols
C)   Entisols
D)   Vertisols
E)   Inceptisols

Exam 12: Soils

The smallest-sized pieces of a soil are ________.

Correct AnswerverifiedShow Answer

The process of eluviation in soils is the same thing as leaching.

Correct AnswerverifiedShow Answer

An Alfisol is most closely related to ________.

Correct AnswerverifiedShow Answer

A soil with a large percentage of clay would be ________ and ________.

Correct AnswerverifiedShow Answer

Soils are considered part of the ________.

Correct AnswerverifiedShow Answer

Write a paragraph explaining the important properties of oxisols.

Correct AnswerverifiedMost heavily weathered soils o...View AnswerShow Answer

Ultisols generally lack ________.

Correct AnswerverifiedShow Answer

The processes that deepen and age soils include all but the following:

Correct AnswerverifiedShow Answer

A dark color is a sure indication that the soil is fertile.

Correct AnswerverifiedShow Answer

Parent material is closely associated with which soil-forming factor?

Correct AnswerverifiedShow Answer

The B horizon is usually called ________.

Correct AnswerverifiedShow Answer

Acid soils deprive plants of nutrients by the process of leaching.

Correct AnswerverifiedShow Answer

Three-quarters of the soil's metabolic activity is generated by ________.

Correct AnswerverifiedShow Answer

Laterization represents the most rapid cycling of nutrients of all soil-forming processes.

Correct AnswerverifiedShow Answer

The true soil layer is known as ________.

Correct AnswerverifiedShow Answer

The measure of acidity/alkalinity in soils is based on the relative concentration of active hydrogen ions.

Correct AnswerverifiedShow Answer

Shale regolith produces coarse-textured soil and limits soil development.

Correct AnswerverifiedShow Answer

Earthworms ________.

Correct AnswerverifiedShow Answer

This soil order is developed from volcanic ash.

Correct AnswerverifiedShow Answer

Seeds germinate mainly in the ________ horizon.

Correct AnswerverifiedShow Answer

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A soil with a large percentage of clay would be and .

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Most heavily weathered soils o...
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