Question 1

Describe and explain the distribution of soil orders across the United States.

Accepted Answer

Across the United States,there is a soil

Question 2

The branch of soil science that deals with the origin,classification,distribution,and description of soils is known as

Accepted Answer

A) geology. 
B) pedology. 
C) geomorphology. 
D) edaphology. 
A) geology. 
B) pedology. 
C) geomorphology. 
D) edaphology.

Question 3

Ped formation enhances

Accepted Answer

A) soil texture. 
B) soil horizons. 
C) plasticity. 
D) permeability. 
A) soil texture. 
B) soil horizons. 
C) plasticity. 
D) permeability.

Question 4

Which of the following human activities may make soils more prone to erosion?

Accepted Answer

A) forest clearance 
B) overcultivation 
C) overgrazing 
D) Overcultivation,overgrazing,and forest clearance may all make soils more prone to erosion. 
A) forest clearance 
B) overcultivation 
C) overgrazing 
D) Overcultivation,overgrazing,and forest clearance may all make soils more prone to erosion.

Question 5

Laterization is likely to occur

Accepted Answer

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

Question 6

Between 1982 to 2007,there was actually a decrease in soil erosion on U.S.cropland.

Accepted Answer

A) True 
 B)False

Question 7

The horizon that is commonly called topsoil is the _______horizon.

Accepted Answer

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

Question 8

Which of the following soil horizon designations is the CORRECT sequence from the surface to the bedrock?

Accepted Answer

A) A,B,C,O,R 
B) S,O,I,L 
C) O,E,C,B,A 
D) O,A,E,B,C 
A) A,B,C,O,R 
B) S,O,I,L 
C) O,E,C,B,A 
D) O,A,E,B,C

Question 9

Rounded peds have _______space between them than other peds,and are therefore _______for plant growth.

Accepted Answer

A) less; worse 
B) more; better 
C) more; worse 
D) less; better 
A) less; worse 
B) more; better 
C) more; worse 
D) less; better

Question 10

The phenomenon of desert expansion along the margins of semiarid and arid lands is known as

Accepted Answer

A) deflation. 
B) desertification. 
C) permeability. 
D) erosion. 
A) deflation. 
B) desertification. 
C) permeability. 
D) erosion.

Question 11

Soil texture is probably the most permanent property of a soil.

Accepted Answer

A) True 
 B)False

Question 12

Where would one likely find the deepest soil development?

Accepted Answer

A) Over the oldest geological formations in an area,regardless of slope 
B) On steep slopes 
C) Level or nearly level ground 
D) Moderately sloping,south facing hills 
A) Over the oldest geological formations in an area,regardless of slope 
B) On steep slopes 
C) Level or nearly level ground 
D) Moderately sloping,south facing hills

Question 13

Over 15,000 soil series have been classified up to this time in the United States and Canada.

Accepted Answer

A) True 
 B)False

Question 14

The smallest natural lump or cluster of soil particles is known as a

Accepted Answer

A) ped. 
B) horizon. 
C) separate. 
D) profile. 
A) ped. 
B) horizon. 
C) separate. 
D) profile.

Question 15

Soil texture refers to

Accepted Answer

A) pebbles,gravel,cobble,and other materials greater than 2 mm in diameter. 
B) the different soil horizons. 
C) differing soil colors in a pedon. 
D) the mixture and proportions individual mineral particles. 
A) pebbles,gravel,cobble,and other materials greater than 2 mm in diameter. 
B) the different soil horizons. 
C) differing soil colors in a pedon. 
D) the mixture and proportions individual mineral particles.

Question 16

Carbon dioxide concentrations in soil are_______than in the atmosphere because of _______.

Accepted Answer

A) higher; decay of dead plants and animals 
B) higher; ongoing respiration in the ground 
C) lower; transpiration 
D) lower; plant photosynthesis 
A) higher; decay of dead plants and animals 
B) higher; ongoing respiration in the ground 
C) lower; transpiration 
D) lower; plant photosynthesis

Question 17

In regards to soil-formation,which of the following best describes the role of climate?

Accepted Answer

A) Relative humidity and atmospheric pressure are the dominant climatic factors that influence soil development. 
B) Temperature and moisture determine the chemical reactions,organic activity,and water movement within soils. 
C) Because all soils are ancient,they show the climatic conditions of the period in which they formed. 
D) Of the five principle soil-forming factors,climate is the least significant with little correlation between soil and climates worldwide. 
A) Relative humidity and atmospheric pressure are the dominant climatic factors that influence soil development. 
B) Temperature and moisture determine the chemical reactions,organic activity,and water movement within soils. 
C) Because all soils are ancient,they show the climatic conditions of the period in which they formed. 
D) Of the five principle soil-forming factors,climate is the least significant with little correlation between soil and climates worldwide.

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

Rounded peds have more pore space and permeability than do other ped shapes.

Accepted Answer

A) True 
 B)False

Question 20

Prime farmland soil that is a few centimeters thick may require 500 years to mature.

Accepted Answer

A) True 
 B)False

Describe and explain the distribution of soil orders across the United States.

The branch of soil science that deals with the origin,classification,distribution,and description of soils is known as

Ped formation enhances

Which of the following human activities may make soils more prone to erosion?

Laterization is likely to occur

Between 1982 to 2007,there was actually a decrease in soil erosion on U.S.cropland.

The horizon that is commonly called topsoil is the _______horizon.

Which of the following soil horizon designations is the CORRECT sequence from the surface to the bedrock?

Rounded peds have _space between them than other peds,and are therefore _for plant growth.

The phenomenon of desert expansion along the margins of semiarid and arid lands is known as

Soil texture is probably the most permanent property of a soil.

Where would one likely find the deepest soil development?

Over 15,000 soil series have been classified up to this time in the United States and Canada.

The smallest natural lump or cluster of soil particles is known as a

Soil texture refers to

Carbon dioxide concentrations in soil are_than in the atmosphere because of _.

In regards to soil-formation,which of the following best describes the role of climate?

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

Rounded peds have more pore space and permeability than do other ped shapes.

Prime farmland soil that is a few centimeters thick may require 500 years to mature.

The Science of Geography

The Solar System,sun,and Earth

Energy Balance Essentials

Wind Essentials

Waterʹs Unique Properties

Water on Earth

Review of Earthʹs Climate System

Population Growth and Fossil Fuel Burning the Setting for Climate Change

The Pace of Change

Earthʹs Surface Relief Features

Landmass Denudation

Drainage Basins and Drainage Patterns

Global Oceans and Seas

Snow Into Ice--The Basis of Glaciers

Energy Flows and Nutrient Cycles

Biogeographic Divisions

Filters

Exam 15: Soil Development and Soil Profiles

Describe and explain the distribution of soil orders across the United States.

The branch of soil science that deals with the origin,classification,distribution,and description of soils is known as

Ped formation enhances

Which of the following human activities may make soils more prone to erosion?

Laterization is likely to occur

Between 1982 to 2007,there was actually a decrease in soil erosion on U.S.cropland.

The horizon that is commonly called topsoil is the _______horizon.

Which of the following soil horizon designations is the CORRECT sequence from the surface to the bedrock?

Rounded peds have _______space between them than other peds,and are therefore _______for plant growth.

The phenomenon of desert expansion along the margins of semiarid and arid lands is known as

Soil texture is probably the most permanent property of a soil.

Where would one likely find the deepest soil development?

Over 15,000 soil series have been classified up to this time in the United States and Canada.

The smallest natural lump or cluster of soil particles is known as a

Soil texture refers to

Carbon dioxide concentrations in soil are_______than in the atmosphere because of _______.

In regards to soil-formation,which of the following best describes the role of climate?

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

Rounded peds have more pore space and permeability than do other ped shapes.

Prime farmland soil that is a few centimeters thick may require 500 years to mature.

The Science of Geography

The Solar System,sun,and Earth

Energy Balance Essentials

Wind Essentials

Waterʹs Unique Properties

Water on Earth

Review of Earthʹs Climate System

Population Growth and Fossil Fuel Burning the Setting for Climate Change

The Pace of Change

Earthʹs Surface Relief Features

Landmass Denudation

Drainage Basins and Drainage Patterns

Global Oceans and Seas

Snow Into Ice--The Basis of Glaciers

Energy Flows and Nutrient Cycles

Biogeographic Divisions

Filters

Rounded peds have _space between them than other peds,and are therefore _for plant growth.

Carbon dioxide concentrations in soil are_than in the atmosphere because of _.