Question 1

If you want to maximize the quantity of vegetative cover on soil which of the following tillage practices would you use?

Accepted Answer

A) conventional moldboard plow 
B) no-tillage 
C) ridge tillage 
D) stubble mulch 
E) strip till 
A) conventional moldboard plow 
B) no-tillage 
C) ridge tillage 
D) stubble mulch 
E) strip till B

Question 2

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 3

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  True

Question 4

Slope length is generally of greater significance in determining erosion rate than is steepness of slope.

Accepted Answer

A) True 
 B)False

Question 5

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 6

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 7

The key to preventing soil erosion by water on both farmland and landscaping job sites is ____.

Accepted Answer

A) To keep the soil surface covered with vegetation. 
B) To provide adequate surface and subsurface drainage. 
C) To grade or till the soil until a smooth surface is achieved. 
D) To keep the soil moist (with irrigation if necessary). 
E) To practice good landscape sanitation by clearing away any weeds and old plant residues. 
A) To keep the soil surface covered with vegetation. 
B) To provide adequate surface and subsurface drainage. 
C) To grade or till the soil until a smooth surface is achieved. 
D) To keep the soil moist (with irrigation if necessary). 
E) To practice good landscape sanitation by clearing away any weeds and old plant residues.

Question 8

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

Question 9

Conservation tillage systems are now in use on some 75% of the cropland in the USA.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following statements about soil erosion is not true?

Accepted Answer

A) Soil erosion losses per hectare of cropped land are higher in Asia and Africa than the United States. 
B) The rate of soil erosion loss in the United States declined from 1980 to 1995. 
C) Downstream off-site costs of erosion are often higher than those in upstream fields from which the soil came. 
D) Soil erosion losses of potassium exceed those of nitrogen and phosphorus. 
E) Less than 20 percent of the total soil erosion in the United States comes from croplands. 
A) Soil erosion losses per hectare of cropped land are higher in Asia and Africa than the United States. 
B) The rate of soil erosion loss in the United States declined from 1980 to 1995. 
C) Downstream off-site costs of erosion are often higher than those in upstream fields from which the soil came. 
D) Soil erosion losses of potassium exceed those of nitrogen and phosphorus. 
E) Less than 20 percent of the total soil erosion in the United States comes from croplands.

Question 11

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 12

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

Accepted Answer

A) True 
 B)False

Question 13

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 14

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 15

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

Question 16

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 17

The U.S.Department of Agriculture has developed soil-loss tolerance limits (T values) for different soils.Which of the following is the highest T value assigned for most soils in this country (Mg/ha)?

Accepted Answer

A) 5.0 
B) 15 
C) 11 
D) 20 
E) 2 
A) 5.0 
B) 15 
C) 11 
D) 20 
E) 2

Question 18

Which of the following statements is true?

Accepted Answer

A) Sheet erosion is most obvious from a distance. 
B) Gully erosion carries the most sediment away from lands in the United States. 
C) Rill erosion is the most serious in forested areas. 
D) Rill erosion is initiated before water concentrates in small 1-2 cm channels. 
E) Rill erosion channels can be removed by ordinary cultivation. 
A) Sheet erosion is most obvious from a distance. 
B) Gully erosion carries the most sediment away from lands in the United States. 
C) Rill erosion is the most serious in forested areas. 
D) Rill erosion is initiated before water concentrates in small 1-2 cm channels. 
E) Rill erosion channels can be removed by ordinary cultivation.

Question 19

Vegetative barriers planted on the contour have been found to create low-cost "natural" terraces.

Accepted Answer

A) True 
 B)False

Question 20

Conservation tillage has generally positive effects on soil physical properties.

Accepted Answer

A) True 
 B)False

If you want to maximize the quantity of vegetative cover on soil which of the following tillage practices would you use?

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

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.

Slope length is generally of greater significance in determining erosion rate than is steepness of slope.

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

The key to preventing soil erosion by water on both farmland and landscaping job sites is ____.

Wind erosion is generally not affected by _____.

Conservation tillage systems are now in use on some 75% of the cropland in the USA.

Which of the following statements about soil erosion is not true?

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?

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

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

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

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

The U.S.Department of Agriculture has developed soil-loss tolerance limits (T values) for different soils.Which of the following is the highest T value assigned for most soils in this country (Mg/ha)?

Which of the following statements is true?

Vegetative barriers planted on the contour have been found to create low-cost "natural" terraces.

Conservation tillage has generally positive effects on soil physical properties.

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

Soil Colloids: Seat of Soil Chemical and Physical Activity

Soil Acidity

Soils of Dry Regions: Alkalinity, Salinity, and Sodicity

Organisms and Ecology of the Soil

Soil Organic Matter

Nitrogen and Sulfur Economy of Soils

Soil Phosphorus and Potassium

Micronutrients and Other Trace Elements

Practical Nutrient Management

Soils and Chemical Pollution

Geographic Soils Information

Prospects for Global Soil Quality

Filters

Exam 17: Soil Erosion and Its Control

If you want to maximize the quantity of vegetative cover on soil which of the following tillage practices would you use?

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

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.

Slope length is generally of greater significance in determining erosion rate than is steepness of slope.

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

The key to preventing soil erosion by water on both farmland and landscaping job sites is ____.

Wind erosion is generally not affected by _____.

Conservation tillage systems are now in use on some 75% of the cropland in the USA.

Which of the following statements about soil erosion is not true?

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?

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

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

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

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

The U.S.Department of Agriculture has developed soil-loss tolerance limits (T values) for different soils.Which of the following is the highest T value assigned for most soils in this country (Mg/ha)?

Which of the following statements is true?

Vegetative barriers planted on the contour have been found to create low-cost "natural" terraces.

Conservation tillage has generally positive effects on soil physical properties.

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

Soil Colloids: Seat of Soil Chemical and Physical Activity

Soil Acidity

Soils of Dry Regions: Alkalinity, Salinity, and Sodicity

Organisms and Ecology of the Soil

Soil Organic Matter

Nitrogen and Sulfur Economy of Soils

Soil Phosphorus and Potassium

Micronutrients and Other Trace Elements

Practical Nutrient Management

Soils and Chemical Pollution

Geographic Soils Information

Prospects for Global Soil Quality

Filters