Question 1

The R factor of the Universal soil-loss equation is concerned with _____.

Accepted Answer

A) soil erodibility 
B) residue cover on the soil 
C) terraces 
D) climate 
E) slope steepness 
A) soil erodibility 
B) residue cover on the soil 
C) terraces 
D) climate 
E) slope steepness D

Question 2

The universal soil-loss equation (USLE)suggests that soil erosion loss is a product of all but one of the following factors:

Accepted Answer

A) soil drainage 
B) climate 
C) slope length 
D) sloped steepness 
E) vegetative cover 
A) soil drainage 
B) climate 
C) slope length 
D) sloped steepness 
E) vegetative cover A

Question 3

Wind erosion is generally not affected by _____.

Accepted Answer

A) soil moisture 
B) soil crusting 
C) bulk density of the soil 
D) soil pH 
E) soil texture 
A) soil moisture 
B) soil crusting 
C) bulk density of the soil 
D) soil pH 
E) soil texture D

Question 4

In the United States,losses of soil due to wind and water erosion decreased by nearly 40% between 1982 and 2003.

Accepted Answer

A) True 
 B)False

Question 5

The surface soil pH is generally higher on no-tillage plots than on comparable conventionally tilled plots.

Accepted Answer

A) True 
 B)False

Question 6

The effects of conservation tillage on soil erosion would be more pronounced in fields cropped continuously to corn than in fields cropped to soybean.

Accepted Answer

A) True 
 B)False

Question 7

You have been asked to produce continuous corn on five different soils using both no-till and conventional management systems.Yields on the no-till and conventional-till systems are about the same on all but one of the soils.In which of the following suborders would the poor-performing soil most likely be classified?

Accepted Answer

A) Orthods 
B) Eutrox 
C) Borolls 
D) Udalfs 
E) Xerolls 
A) Orthods 
B) Eutrox 
C) Borolls 
D) Udalfs 
E) Xerolls

Question 8

To be classified as a conservation tillage practice,a system must leave at least what portion of the soil surface covered with plant residues?

Accepted Answer

A) 10% 
B) 20% 
C) 30% 
D) 40% 
E) 50% 
A) 10% 
B) 20% 
C) 30% 
D) 40% 
E) 50%

Question 9

In the U.S.Department of Agriculture's land capability classification systems,some 15% of the Nation's cultivated land is in Class I.

Accepted Answer

A) True 
 B)False

Question 10

The Revised Universal Soil-Loss Equation (RUSLE)is more site-specific,more accurate in predicting soil loss,and more quickly compares alternative procedures than does USLE.

Accepted Answer

A) True 
 B)False

Question 11

The soil erodibility factor in the Universal soil-loss equation (USLE)relates primarily to the soil's infiltration capacity and structural stability.

Accepted Answer

A) True 
 B)False

Question 12

A soil has been managed using a no-till system for 10 years following many years of conventional tillage operations.Which of the following changes in surface soil properties would you expect due to the no-till management system?

Accepted Answer

A) the earthworm population would decline 
B) soil pH would increase 
C) aggregate stability would decline 
D) organic matter content would increase 
E) bulk density would increase 
A) the earthworm population would decline 
B) soil pH would increase 
C) aggregate stability would decline 
D) organic matter content would increase 
E) bulk density would increase

Question 13

Saltation is the process of wind movement of salt-affected soils from one location to another in arid regions.

Accepted Answer

A) True 
 B)False

Question 14

Conservation tillage systems are said to have all of the following advantages but one over conventional tillage systems

Accepted Answer

A) its labor and energy requirements are lower 
B) it encourages higher microbial population numbers in the soil 
C) it involves the use of less toxic weed control practices 
D) it increases the hydraulic conductivity of the soil 
E) it reduces soil erosion 
A) its labor and energy requirements are lower 
B) it encourages higher microbial population numbers in the soil 
C) it involves the use of less toxic weed control practices 
D) it increases the hydraulic conductivity of the soil 
E) it reduces soil erosion

Question 15

Wind erosion accounts for about what percent of the total soil erosion losses in the United States?

Accepted Answer

A) 5% 
B) 10% 
C) 20% 
D) 35% 
E) 75% 
A) 5% 
B) 10% 
C) 20% 
D) 35% 
E) 75%

Question 16

Conservation tillage systems are now in use on some 85% of the cropland in the USA.

Accepted Answer

A) True 
 B)False

Question 17

Yields of row crops on poorly drained soils are generally somewhat higher with no-tillage systems than with conventional tillage systems.

Accepted Answer

A) True 
 B)False

Question 18

Some 3/4 of the total soil loss from erosion in the United States is carried away by water.

Accepted Answer

A) True 
 B)False

Question 19

Although transportation of soil particles in suspension in the atmosphere is very spectacular,less than 40% of the wind erosion losses generally occur in this manner.

Accepted Answer

A) True 
 B)False

Question 20

The T values are the maximum losses of soil by erosion that can be tolerated without a reduction in the soil's long term productivity.

Accepted Answer

A) True 
 B)False

The R factor of the Universal soil-loss equation is concerned with _____.

The universal soil-loss equation (USLE)suggests that soil erosion loss is a product of all but one of the following factors:

Wind erosion is generally not affected by _____.

In the United States,losses of soil due to wind and water erosion decreased by nearly 40% between 1982 and 2003.

The surface soil pH is generally higher on no-tillage plots than on comparable conventionally tilled plots.

The effects of conservation tillage on soil erosion would be more pronounced in fields cropped continuously to corn than in fields cropped to soybean.

To be classified as a conservation tillage practice,a system must leave at least what portion of the soil surface covered with plant residues?

In the U.S.Department of Agriculture's land capability classification systems,some 15% of the Nation's cultivated land is in Class I.

The Revised Universal Soil-Loss Equation (RUSLE)is more site-specific,more accurate in predicting soil loss,and more quickly compares alternative procedures than does USLE.

The soil erodibility factor in the Universal soil-loss equation (USLE)relates primarily to the soil's infiltration capacity and structural stability.

A soil has been managed using a no-till system for 10 years following many years of conventional tillage operations.Which of the following changes in surface soil properties would you expect due to the no-till management system?

Saltation is the process of wind movement of salt-affected soils from one location to another in arid regions.

Conservation tillage systems are said to have all of the following advantages but one over conventional tillage systems

Wind erosion accounts for about what percent of the total soil erosion losses in the United States?

Conservation tillage systems are now in use on some 85% of the cropland in the USA.

Yields of row crops on poorly drained soils are generally somewhat higher with no-tillage systems than with conventional tillage systems.

Some 3/4 of the total soil loss from erosion in the United States is carried away by water.

Although transportation of soil particles in suspension in the atmosphere is very spectacular,less than 40% of the wind erosion losses generally occur in this manner.

The T values are the maximum losses of soil by erosion that can be tolerated without a reduction in the soil's long term productivity.

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

Soil Aeration and Temperature

The Colloidal Fraction: Seat of Soil Chemical and Physical Activity

Soil Acidity

Soils of Dry Regionsalkalinity,salinity and Sodicity

Organisms and Ecology of the Soil

Soil Organic Matter

Nitrogen and Sulfur Economy of Soils

Soil Phosphorus and Potassium

Calcium,magnesium and Trace Elements

Practical Nutrient Management

Soils and Chemical Pollution

Geographic Information About Soils

Prospects for Global Soil Quality As Affected by Human Activities

Filters

Exam 17: Soil Erosion and Its Control

The R factor of the Universal soil-loss equation is concerned with _____.

The universal soil-loss equation (USLE)suggests that soil erosion loss is a product of all but one of the following factors:

Wind erosion is generally not affected by _____.

In the United States,losses of soil due to wind and water erosion decreased by nearly 40% between 1982 and 2003.

The surface soil pH is generally higher on no-tillage plots than on comparable conventionally tilled plots.

The effects of conservation tillage on soil erosion would be more pronounced in fields cropped continuously to corn than in fields cropped to soybean.

To be classified as a conservation tillage practice,a system must leave at least what portion of the soil surface covered with plant residues?

In the U.S.Department of Agriculture's land capability classification systems,some 15% of the Nation's cultivated land is in Class I.

The Revised Universal Soil-Loss Equation (RUSLE)is more site-specific,more accurate in predicting soil loss,and more quickly compares alternative procedures than does USLE.

The soil erodibility factor in the Universal soil-loss equation (USLE)relates primarily to the soil's infiltration capacity and structural stability.

A soil has been managed using a no-till system for 10 years following many years of conventional tillage operations.Which of the following changes in surface soil properties would you expect due to the no-till management system?

Saltation is the process of wind movement of salt-affected soils from one location to another in arid regions.

Conservation tillage systems are said to have all of the following advantages but one over conventional tillage systems

Wind erosion accounts for about what percent of the total soil erosion losses in the United States?

Conservation tillage systems are now in use on some 85% of the cropland in the USA.

Yields of row crops on poorly drained soils are generally somewhat higher with no-tillage systems than with conventional tillage systems.

Some 3/4 of the total soil loss from erosion in the United States is carried away by water.

Although transportation of soil particles in suspension in the atmosphere is very spectacular,less than 40% of the wind erosion losses generally occur in this manner.

The T values are the maximum losses of soil by erosion that can be tolerated without a reduction in the soil's long term productivity.

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

Soil Aeration and Temperature

The Colloidal Fraction: Seat of Soil Chemical and Physical Activity

Soil Acidity

Soils of Dry Regionsalkalinity,salinity and Sodicity

Organisms and Ecology of the Soil

Soil Organic Matter

Nitrogen and Sulfur Economy of Soils

Soil Phosphorus and Potassium

Calcium,magnesium and Trace Elements

Practical Nutrient Management

Soils and Chemical Pollution

Geographic Information About Soils

Prospects for Global Soil Quality As Affected by Human Activities

Filters