Question 1

Which of the following is (are) considered necessary features for an area to be delineated as a wetland?

Accepted Answer

A)  hydric soils 
B)  shallow standing water 
C)  aquatic vegetation 
D)  organic soils 
E)  all of the above 
A)  hydric soils 
B)  shallow standing water 
C)  aquatic vegetation 
D)  organic soils 
E)  all of the above A

Question 2

The partial pressure of oxygen in the atmosphere is 0.21 bar and that of nitrogen 0.78. Which of the following partial pressure levels would you expect to find in the pores of a moderately well- drained soil?

Accepted Answer

A)  0.21 (oxygen) 
B)  0.80 (nitrogen) 
C)  0.30 (oxygen) 
D)  0.50 (nitrogen) 
E)  0.15 (oxygen) 
A)  0.21 (oxygen) 
B)  0.80 (nitrogen) 
C)  0.30 (oxygen) 
D)  0.50 (nitrogen) 
E)  0.15 (oxygen) E

Question 3

Conservation tillage is not practical in some areas of the Northern part of the United States because the practice lowers the surface soil temperature in the spring of the year.

Accepted Answer

A) True 
 B)False  True

Question 4

A soil on the south facing slope in Canada is likely to be drier and warmer than a comparable soil on a north facing slope.

Accepted Answer

A) True 
 B)False

Question 5

Compared to upland soils, wetland soils would be characterized by an abundance of _____.

Accepted Answer

A)  methane 
B)  CO2 
C)  NO3- 
D)  SO42- 
E)  Fe3+  
A)  methane 
B)  CO2 
C)  NO3- 
D)  SO42- 
E)  Fe3+

Question 6

The process of aerobic respiration is a significant source of which of the following gases?

Accepted Answer

A)  methane 
B)  oxygen 
C)  nitrogen 
D)  carbon dioxide 
E)  ammonia 
A)  methane 
B)  oxygen 
C)  nitrogen 
D)  carbon dioxide 
E)  ammonia

Question 7

The alternate freezing and thawing of soils results in the upward heaving of plants and building foundations.

Accepted Answer

A) True 
 B)False

Question 8

If the CO2 content of soil air is 3.5%, it is 100 times higher than that of the atmosphere.

Accepted Answer

A) True 
 B)False

Question 9

In acid soils you would be concerned if the redox potential was low since it could mean a deficiency of some plant nutrients such as iron and manganese.

Accepted Answer

A) True 
 B)False

Question 10

The primary characteristic of subsoils that accounts for the ability of ground circulating heat pumps to moderate temperatures in houses in both summer and winter is _____.

Accepted Answer

A)  the high redox potential of the soil 
B)  the high heat of the evapotranspiration 
C)  the ready conduction of heat in the soil 
D)  the high specific heat of the soil 
E)  the low oxygen content of the subsoil 
A)  the high redox potential of the soil 
B)  the high heat of the evapotranspiration 
C)  the ready conduction of heat in the soil 
D)  the high specific heat of the soil 
E)  the low oxygen content of the subsoil

Question 11

Which of the following processes are most apt to encourage good soil aeration?

Accepted Answer

A)  root respiration 
B)  organic matter decomposition 
C)  diffusion of oxygen from the soil to the atmosphere 
D)  creation of more macropores 
E)  reaction of oxygen with organic matter 
A)  root respiration 
B)  organic matter decomposition 
C)  diffusion of oxygen from the soil to the atmosphere 
D)  creation of more macropores 
E)  reaction of oxygen with organic matter

Question 12

A well aerated soil is characterized by a relative abundance of _____.

Accepted Answer

A)  micropores 
B)  Fe2+ions 
C)  NH4+ ions 
D)  NO3- ions 
E)  methane gas 
A)  micropores 
B)  Fe2+ions 
C)  NH4+ ions 
D)  NO3- ions 
E)  methane gas

Question 13

Some 40 to 50% of the solar radiation in humid regions is used to heat the soil.

Accepted Answer

A) True 
 B)False

Question 14

Soil A has a redox potential of 400 mV, soil B -200 mV. Of the two soils, Soil A is more apt to be characterized by an abundance of _____.

Accepted Answer

A)  Fe2+ ions 
B)  Mn2+ ions 
C)  H+ ions 
D)  S2- ions 
E)  molecular oxygen 
A)  Fe2+ ions 
B)  Mn2+ ions 
C)  H+ ions 
D)  S2- ions 
E)  molecular oxygen

Question 15

Which of the following practices would encourage higher soil temperatures in the spring in a humid- temperate area? 61

Accepted Answer

A)  apply a thick mulch of straw 
B)  follow no-till practices with a killed cover crop 
C)  use a plastic mulch 
D)  irrigate the soil to leave it wet and dark colored 
E)  rototill the soil to leave it fluffy and bare 
A)  apply a thick mulch of straw 
B)  follow no-till practices with a killed cover crop 
C)  use a plastic mulch 
D)  irrigate the soil to leave it wet and dark colored 
E)  rototill the soil to leave it fluffy and bare

Question 16

Wildfires in forested areas result in the formation of organic compounds that enhance the percolation of water through the soil.

Accepted Answer

A) True 
 B)False

Question 17

Reduced forms of iron and manganese along with soil organic matter largely control the color of well-drained soils.

Accepted Answer

A) True 
 B)False

Question 18

The redox potential of a soil is -250 mV. Which of the following forms of the pertinent elements would you expect to find in the soil?

Accepted Answer

A)  NO3- 
B)  SO42- 
C)  Fe2+ 
D)  Mn4+ 
E)  CO2  
A)  NO3- 
B)  SO42- 
C)  Fe2+ 
D)  Mn4+ 
E)  CO2

Question 19

The bulk of gaseous interchange in soils takes place by _____.

Accepted Answer

A)  mass flow 
B)  partial pressure of N2  
C)  diffusion 
D)  dissolution in water 
E)  respiration 
A)  mass flow 
B)  partial pressure of N2  
C)  diffusion 
D)  dissolution in water 
E)  respiration

Question 20

Which of the following is not a major factor in determining the soil aeration status?

Accepted Answer

A)  redox potential 
B)  volume of macropores 
C)  nitrogen gas 
D)  carbon dioxide 
E)  oxygen 
A)  redox potential 
B)  volume of macropores 
C)  nitrogen gas 
D)  carbon dioxide 
E)  oxygen

Which of the following is (are) considered necessary features for an area to be delineated as a wetland?

The partial pressure of oxygen in the atmosphere is 0.21 bar and that of nitrogen 0.78. Which of the following partial pressure levels would you expect to find in the pores of a moderately well- drained soil?

Conservation tillage is not practical in some areas of the Northern part of the United States because the practice lowers the surface soil temperature in the spring of the year.

A soil on the south facing slope in Canada is likely to be drier and warmer than a comparable soil on a north facing slope.

Compared to upland soils, wetland soils would be characterized by an abundance of _____.

The process of aerobic respiration is a significant source of which of the following gases?

The alternate freezing and thawing of soils results in the upward heaving of plants and building foundations.

If the CO₂ content of soil air is 3.5%, it is 100 times higher than that of the atmosphere.

In acid soils you would be concerned if the redox potential was low since it could mean a deficiency of some plant nutrients such as iron and manganese.

The primary characteristic of subsoils that accounts for the ability of ground circulating heat pumps to moderate temperatures in houses in both summer and winter is _____.

Which of the following processes are most apt to encourage good soil aeration?

A well aerated soil is characterized by a relative abundance of _____.

Some 40 to 50% of the solar radiation in humid regions is used to heat the soil.

Soil A has a redox potential of 400 mV, soil B -200 mV. Of the two soils, Soil A is more apt to be characterized by an abundance of _____.

Which of the following practices would encourage higher soil temperatures in the spring in a humid- temperate area? 61

Wildfires in forested areas result in the formation of organic compounds that enhance the percolation of water through the soil.

Reduced forms of iron and manganese along with soil organic matter largely control the color of well-drained soils.

The redox potential of a soil is -250 mV. Which of the following forms of the pertinent elements would you expect to find in the soil?

The bulk of gaseous interchange in soils takes place by _____.

Which of the following is not a major factor in determining the soil aeration status?

The Soils Around Us

Formation of Soils From Parent Materials

Soil Classification

Soil Architecture and Physical Properties

Soil Water: Characteristics and Behavior

Soil and the Hydrologic Cycle

The Colloidal Fraction: Seat of Soil Chemical and Physical Activity

Soil Acidity, Alkalinity, Aridity and Salinity

Organisms and Ecology of the Soil

Soil Organic Matter Overview

Nutrient Cycles and Soil Fertility

Practical Nutrient Management

Soil Erosion and Its Control

Soils and Chemical Pollution

Filters

Exam 7: Soil Aeration and Temperature

Which of the following is (are) considered necessary features for an area to be delineated as a wetland?

The partial pressure of oxygen in the atmosphere is 0.21 bar and that of nitrogen 0.78. Which of the following partial pressure levels would you expect to find in the pores of a moderately well- drained soil?

Conservation tillage is not practical in some areas of the Northern part of the United States because the practice lowers the surface soil temperature in the spring of the year.

A soil on the south facing slope in Canada is likely to be drier and warmer than a comparable soil on a north facing slope.

Compared to upland soils, wetland soils would be characterized by an abundance of _____.

The process of aerobic respiration is a significant source of which of the following gases?

The alternate freezing and thawing of soils results in the upward heaving of plants and building foundations.

If the CO2 content of soil air is 3.5%, it is 100 times higher than that of the atmosphere.

In acid soils you would be concerned if the redox potential was low since it could mean a deficiency of some plant nutrients such as iron and manganese.

The primary characteristic of subsoils that accounts for the ability of ground circulating heat pumps to moderate temperatures in houses in both summer and winter is _____.

Which of the following processes are most apt to encourage good soil aeration?

A well aerated soil is characterized by a relative abundance of _____.

Some 40 to 50% of the solar radiation in humid regions is used to heat the soil.

Soil A has a redox potential of 400 mV, soil B -200 mV. Of the two soils, Soil A is more apt to be characterized by an abundance of _____.

Which of the following practices would encourage higher soil temperatures in the spring in a humid- temperate area? 61

Wildfires in forested areas result in the formation of organic compounds that enhance the percolation of water through the soil.

Reduced forms of iron and manganese along with soil organic matter largely control the color of well-drained soils.

The redox potential of a soil is -250 mV. Which of the following forms of the pertinent elements would you expect to find in the soil?

The bulk of gaseous interchange in soils takes place by _____.

Which of the following is not a major factor in determining the soil aeration status?

The Soils Around Us

Formation of Soils From Parent Materials

Soil Classification

Soil Architecture and Physical Properties

Soil Water: Characteristics and Behavior

Soil and the Hydrologic Cycle

The Colloidal Fraction: Seat of Soil Chemical and Physical Activity

Soil Acidity, Alkalinity, Aridity and Salinity

Organisms and Ecology of the Soil

Soil Organic Matter Overview

Nutrient Cycles and Soil Fertility

Practical Nutrient Management

Soil Erosion and Its Control

Soils and Chemical Pollution

Filters

If the CO₂ content of soil air is 3.5%, it is 100 times higher than that of the atmosphere.