Question 1

Mollisols are, on the whole, the most ________ of all soil orders.

Accepted Answer

A)  productive 
B)  limited 
C)  polar 
D)  equatorial 
E)  neutral 
A)  productive 
B)  limited 
C)  polar 
D)  equatorial 
E)  neutral

Question 2

The deposition of finer particles at a lower level in the soil is illuviation.

Accepted Answer

A) True 
 B)False

Question 3

Soils made up of mainly ________ do not develop a true soil structure.

Accepted Answer

A)  peds 
B)  sand 
C)  loam 
D)  humus 
E)  silt 
A)  peds 
B)  sand 
C)  loam 
D)  humus 
E)  silt

Question 4

The main "type" of water that plants use is ________.

Accepted Answer

A)  vadose 
B)  artesian 
C)  hydroscopic 
D)  capillary 
E)  aquiclude 
A)  vadose 
B)  artesian 
C)  hydroscopic 
D)  capillary 
E)  aquiclude

Question 5

Soils which have formed from salinization are associated with the need for irrigation.

Accepted Answer

A) True 
 B)False

Question 6

After gravitational water has drained away, ________ is the water that remains in the soil and is available for use by plants.

Accepted Answer

A)  groundwater 
B)  hygroscopic water 
C)  capillary water 
D)  water of cohesion 
E)  free water 
A)  groundwater 
B)  hygroscopic water 
C)  capillary water 
D)  water of cohesion 
E)  free water

Question 7

Among layers of the soil horizon, the one with the most organic material is ________.

Accepted Answer

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

Question 8

The weathered layer of loose inorganic material overlaying unfragmented rock below is ________.

Accepted Answer

A)  separates 
B)  regolith 
C)  clay 
D)  peds 
E)  horizons 
A)  separates 
B)  regolith 
C)  clay 
D)  peds 
E)  horizons

Question 9

Which of the following is NOT considered part of the soil?

Accepted Answer

A)  fine, fragmented mineral particles 
B)  water 
C)  air 
D)  dead and rotting plant parts 
E)  living plants 
A)  fine, fragmented mineral particles 
B)  water 
C)  air 
D)  dead and rotting plant parts 
E)  living plants

Question 10

Humus is an example of inorganic colloids in the soil.

Accepted Answer

A) True 
 B)False

Question 11

Soil microorganisms must be destroyed in order to improve agricultural productivity.

Accepted Answer

A) True 
 B)False

Question 12

The "A" horizon or combined "O/A" horizons of the soil are known as the ________.

Accepted Answer

A)  subsurface horizon(s) 
B)  illuviation layer(s) 
C)  epipedon 
D)  regolith 
E)  colloidal layer(s) 
A)  subsurface horizon(s) 
B)  illuviation layer(s) 
C)  epipedon 
D)  regolith 
E)  colloidal layer(s)

Question 13

The cation exchange capacity is most closely associated with ________.

Accepted Answer

A)  sand 
B)  silt 
C)  color 
D)  regolith 
E)  colloids 
A)  sand 
B)  silt 
C)  color 
D)  regolith 
E)  colloids

Question 14

The pedogenic regime associated with high annual precipitation and temperature is ________.

Accepted Answer

A)  gleization 
B)  laterization 
C)  calcification 
D)  salinization 
E)  fixation 
A)  gleization 
B)  laterization 
C)  calcification 
D)  salinization 
E)  fixation

Question 15

Explain how one could differentiate a soil that had developed under a grassland cover from one that had developed under a forest cover.

Accepted Answer

Grassland: humus-rich A horizon with ple

Question 16

Water and air move through the upper layer of the soil through passages called interstices.

Accepted Answer

A) True 
 B)False

Question 17

________ is a soil texture in which none of the three main soil separates dominates the other two.

Accepted Answer

A)  Adobe 
B)  Humus 
C)  Loess 
D)  Loam 
E)  Podzol 
A)  Adobe 
B)  Humus 
C)  Loess 
D)  Loam 
E)  Podzol

Question 18

Mature tropical soils are generally noteworthy for their ________ color.

Accepted Answer

A)  black 
B)  tan 
C)  red 
D)  white 
E)  gray 
A)  black 
B)  tan 
C)  red 
D)  white 
E)  gray

Question 19

What can be learned from a soil's color?

Accepted Answer

The color is the result of chemical proc

Question 20

Which of the following terms is usually confused with but is not directly descriptive of soil moisture?

Accepted Answer

A)  wilting point 
B)  pore spaces 
C)  field capacity 
D)  groundwater 
E)  soil-water budget 
A)  wilting point 
B)  pore spaces 
C)  field capacity 
D)  groundwater 
E)  soil-water budget

Mollisols are, on the whole, the most ________ of all soil orders.

The deposition of finer particles at a lower level in the soil is illuviation.

Soils made up of mainly ________ do not develop a true soil structure.

The main "type" of water that plants use is ________.

Soils which have formed from salinization are associated with the need for irrigation.

After gravitational water has drained away, ________ is the water that remains in the soil and is available for use by plants.

Among layers of the soil horizon, the one with the most organic material is ________.

The weathered layer of loose inorganic material overlaying unfragmented rock below is ________.

Which of the following is NOT considered part of the soil?

Humus is an example of inorganic colloids in the soil.

Soil microorganisms must be destroyed in order to improve agricultural productivity.

The "A" horizon or combined "O/A" horizons of the soil are known as the ________.

The cation exchange capacity is most closely associated with ________.

The pedogenic regime associated with high annual precipitation and temperature is ________.

Explain how one could differentiate a soil that had developed under a grassland cover from one that had developed under a forest cover.

Water and air move through the upper layer of the soil through passages called interstices.

________ is a soil texture in which none of the three main soil separates dominates the other two.

Mature tropical soils are generally noteworthy for their ________ color.

What can be learned from a soil's color?

Which of the following terms is usually confused with but is not directly descriptive of soil moisture?

Introduction to Earth

Portraying Earth

Introduction to the Atmosphere

Insolation and Temperature

Atmospheric Pressure and Wind

Atmospheric Moisture

Atmospheric Disturbances

Climate and Climate Change

The Hydrosphere

Cycles and Patterns of the Biosphere

Terrestrial Flora and Fauna

Introduction to Landform Study

The Internal Processes

Preliminaries to Weathering: Mass Wasting and Erosion

Fluvial Processes

Karst and Hydrothermal Processes

The Topography of Arid Lands

Glacial Modification of Terrain

Coastal Processes and Terrain

Filters

Exam 12: Soils

Mollisols are, on the whole, the most ________ of all soil orders.

The deposition of finer particles at a lower level in the soil is illuviation.

Soils made up of mainly ________ do not develop a true soil structure.

The main "type" of water that plants use is ________.

Soils which have formed from salinization are associated with the need for irrigation.

After gravitational water has drained away, ________ is the water that remains in the soil and is available for use by plants.

Among layers of the soil horizon, the one with the most organic material is ________.

The weathered layer of loose inorganic material overlaying unfragmented rock below is ________.

Which of the following is NOT considered part of the soil?

Humus is an example of inorganic colloids in the soil.

Soil microorganisms must be destroyed in order to improve agricultural productivity.

The "A" horizon or combined "O/A" horizons of the soil are known as the ________.

The cation exchange capacity is most closely associated with ________.

The pedogenic regime associated with high annual precipitation and temperature is ________.

Explain how one could differentiate a soil that had developed under a grassland cover from one that had developed under a forest cover.

Water and air move through the upper layer of the soil through passages called interstices.

________ is a soil texture in which none of the three main soil separates dominates the other two.

Mature tropical soils are generally noteworthy for their ________ color.

What can be learned from a soil's color?

Which of the following terms is usually confused with but is not directly descriptive of soil moisture?

Introduction to Earth

Portraying Earth

Introduction to the Atmosphere

Insolation and Temperature

Atmospheric Pressure and Wind

Atmospheric Moisture

Atmospheric Disturbances

Climate and Climate Change

The Hydrosphere

Cycles and Patterns of the Biosphere

Terrestrial Flora and Fauna

Introduction to Landform Study

The Internal Processes

Preliminaries to Weathering: Mass Wasting and Erosion

Fluvial Processes

Karst and Hydrothermal Processes

The Topography of Arid Lands

Glacial Modification of Terrain

Coastal Processes and Terrain

Filters