Question 1

A(n)  _________ is a type of soil that forms in tropical and subtropical regions where organic material decomposes so fast there is very little A-horizon.

Accepted Answer

A)   mollisol.
B)   oxisol.
C)   aridisol.
D)   alfisol.
E)   spodosol.F) A) and E)
G) B) and C)

Question 2

The ____________ is a lighter-colored soil layer where iron and aluminum often accumulate.

Accepted Answer

A)   A horizon.
B)   B horizon.
C)   C horizon.
D)   O horizon.
E)   E horizon.F) C) and D)
G) A) and B)

Question 3

An important plant to use in crop rotation because of its association with nitrogen-fixing bacteria is:

Accepted Answer

A)   corn.
B)   wheat.
C)   oats.
D)   alfalfa.
E)   potatoes.F) D) and E)
G) A) and E)

Question 4

Which of the following sequences is in the correct order from largest particle size to smallest particle size?

Accepted Answer

A)   Sand > Silt > Gravel > Clay
B)   Sand > Gravel > Clay > Silt
C)   Gravel > Sand > Clay > Silt
D)   Gravel > Sand > Silt > Clay
E)   Clay > Silt > Gravel > SandF) A) and D)
G) D) and E)

Question 5

In the United States, agricultural practices have been modified in support of soil conservation. Identify two specific problems and the policies or actions that have been implemented to reduce the effect of each on soil conservation. Are there any drawbacks to these solutions?

Accepted Answer

One practice has to do with the manner i...

Question 6

A(n)  ___________ is a type of soil that usually forms in colder climates beneath coniferous forests and makes poor farm land because it is often too acidic and nutrient poor.

Accepted Answer

A)   mollisol.
B)   oxisol.
C)   aridisol.
D)   alfisol.
E)   spodosol.F) None of the above
G) C) and E)

Question 7

The ____________ contains weathered pieces of rock and is found just above the solid bedrock.

Accepted Answer

A)   A horizon
B)   B horizon
C)   C horizon
D)   O horizon
E)   E horizonF) D) and E)
G) A) and B)

Question 8

Which of the following authorized the formation of the Soil Conservation Service (now called the
Natural Resources Conservation Service) ?

Accepted Answer

A)   Hugh H. Bennett
B)   Soil Conservation Act of 1935
C)   Food Security Act (Farm Bill)  of 1985
D)   The Conservation Reserve Program
E)   Federal Agriculture Improvement and Reform Act (Farm Bill)  of 1996F) A) and B)
G) C) and E)

Question 9

Humus is composed of:

Accepted Answer

A)   weathered rocks
B)   fresh leaf litter
C)   iron and aluminum compounds.
D)   decomposed organic matter.
E)   various inorganic minerals.F) D) and E)
G) A) and B)

Question 10

Which of the following statements about minerals in soil is true?

Accepted Answer

A)   There are only two mineral ions, potassium and magnesium, that are essential for plant growth.
B)   Negatively charged mineral ions are often washed out of the root zone.
C)   Clay minerals are usually positively charged.
D)   Clay minerals very rarely have charged ions
E)   Clay particles may "hold" mineral ions in the soil and prevent their use by plants.F) None of the above
G) C) and D)

Question 11

Organic fertilizers:

Accepted Answer

A)   have nutrients immediately available to plants.
B)   can consist of manure, crop residues, or bone meal.
C)   are quickly leached out of the soil by rain.
D)   are manufactured.
E)   have minimal effect on the production of a given crop.F) A) and B)
G) All of the above

Question 12

Worldwide, 75 billion metric tons (83 billion tons)  of topsoil is lost annually, primarily due to:

Accepted Answer

A)   poor agricultural practices.
B)   global warming.
C)   ozone depletion.
D)   the soil rustler's black market.
E)   conservation tillage.F) B) and E)
G) All of the above

Question 13

Soil pH is important because:

Accepted Answer

A)   some mineral ions are leached more easily from an acidic soil
B)   plants cannot survive in soils with pH less than about 4.0.
C)   moderately basic soil is ideal for plant growth.
D)   plants can only absorb insoluble forms of mineral elements
E)   All of these choices are correct.F) D) and E)
G) A) and C)

Question 14

Soil degradation is primarily attributed to:

Accepted Answer

A)   wildfires, surplus soil organisms and dense vegetation.
B)   poor agricultural practices, overgrazing and deforestation.
C)   erosion, excessive tillage and coastal location.
D)   exhaustion of parent material, severe climate and leaching.
E)   heavy rainfall, agroforestry and crop rotation.F) A) and E)
G) All of the above

Question 15

A major problem with conservation tillage is:

Accepted Answer

A)   the soil becomes compact.
B)   soil erosion increases.
C)   it increases insect populations.
D)   it requires greater use of herbicides to control weeds.
E)   the soil contains less organic matter.F) B) and D)
G) B) and C)

Question 16

Of the following, which has the greatest permeability?

Accepted Answer

A)   clay
B)   loam
C)   sand
D)   silt
E)   humusF) A) and B)
G) A) and E)

Question 17

Which of the following represents an "ecosystem service" performed by soil organisms?

Accepted Answer

A)   maintaining soil fertility by decaying and cycling organic material
B)   providing minerals by assisting in weathering
C)   altering topography by amplifying erosion
D)   preserving toxic materials by situating toxins into encapsulated structures
E)   contributing to desertification by removing excess moisture from the soilF) B) and E)
G) A) and C)

Exam 14: Soil Resources

Which of the following sequences is in the correct order from largest particle size to smallest particle size?

Correct Answer
verified

A major problem with conservation tillage is:

Correct Answer
verified

Which of the following statements about minerals in soil is true?

Correct Answer
verified

The ____________ contains weathered pieces of rock and is found just above the solid bedrock.

Correct Answer
verified

Which of the following authorized the formation of the Soil Conservation Service (now called the Natural Resources Conservation Service) ?

Correct Answer
verified

In the United States, agricultural practices have been modified in support of soil conservation. Identify two specific problems and the policies or actions that have been implemented to reduce the effect of each on soil conservation. Are there any drawbacks to these solutions?

Correct Answer
verified
One practice has to do with the manner i...
View Answer

Humus is composed of:

Correct Answer
verified

A(n) ___________ is a type of soil that usually forms in colder climates beneath coniferous forests and makes poor farm land because it is often too acidic and nutrient poor.

Correct Answer
verified

A(n) _________ is a type of soil that forms in tropical and subtropical regions where organic material decomposes so fast there is very little A-horizon.

Correct Answer
verified

The ____________ is a lighter-colored soil layer where iron and aluminum often accumulate.

Correct Answer
verified

Soil pH is important because:

Correct Answer
verified

An important plant to use in crop rotation because of its association with nitrogen-fixing bacteria is:

Correct Answer
verified

Organic fertilizers:

Correct Answer
verified

Of the following, which has the greatest permeability?

Correct Answer
verified

Which of the following represents an "ecosystem service" performed by soil organisms?

Correct Answer
verified

Worldwide, 75 billion metric tons (83 billion tons) of topsoil is lost annually, primarily due to:

Correct Answer
verified

Soil degradation is primarily attributed to:

Correct Answer
verified

Exam 14: Soil Resources

Which of the following sequences is in the correct order from largest particle size to smallest particle size?

Correct AnswerverifiedShow Answer

A major problem with conservation tillage is:

Correct AnswerverifiedShow Answer

Which of the following statements about minerals in soil is true?

Correct AnswerverifiedShow Answer

The ____________ contains weathered pieces of rock and is found just above the solid bedrock.

Correct AnswerverifiedShow Answer

Which of the following authorized the formation of the Soil Conservation Service (now called the Natural Resources Conservation Service) ?

Correct AnswerverifiedShow Answer

In the United States, agricultural practices have been modified in support of soil conservation. Identify two specific problems and the policies or actions that have been implemented to reduce the effect of each on soil conservation. Are there any drawbacks to these solutions?

Correct AnswerverifiedOne practice has to do with the manner i...View AnswerShow Answer

Humus is composed of:

Correct AnswerverifiedShow Answer

A(n) ___________ is a type of soil that usually forms in colder climates beneath coniferous forests and makes poor farm land because it is often too acidic and nutrient poor.

Correct AnswerverifiedShow Answer

A(n) _________ is a type of soil that forms in tropical and subtropical regions where organic material decomposes so fast there is very little A-horizon.

Correct AnswerverifiedShow Answer

The ____________ is a lighter-colored soil layer where iron and aluminum often accumulate.

Correct AnswerverifiedShow Answer

Soil pH is important because:

Correct AnswerverifiedShow Answer

An important plant to use in crop rotation because of its association with nitrogen-fixing bacteria is:

Correct AnswerverifiedShow Answer

Organic fertilizers:

Correct AnswerverifiedShow Answer

Of the following, which has the greatest permeability?

Correct AnswerverifiedShow Answer

Which of the following represents an "ecosystem service" performed by soil organisms?

Correct AnswerverifiedShow Answer

Worldwide, 75 billion metric tons (83 billion tons) of topsoil is lost annually, primarily due to:

Correct AnswerverifiedShow Answer

Soil degradation is primarily attributed to:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
One practice has to do with the manner i...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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