Question 1

The leaf area index significantly affects the solar radiation reaching the soil surface.

Accepted Answer

A) True 
 B)False  True

Question 2

Vapor loss from a south-facing slope in Australia would likely be higher than from a north-facing slope.

Accepted Answer

A) True 
 B)False  False

Question 3

Of the various types of drain systems,open ditch systems are most practical and economical for use on __________.

Accepted Answer

A) Vertisols 
B) soils which do not freeze during the winter 
C) soils with a deep water Table 
D) poorly drained soils with sandy profiles 
E) clay soils with poor drainage 
A) Vertisols 
B) soils which do not freeze during the winter 
C) soils with a deep water Table 
D) poorly drained soils with sandy profiles 
E) clay soils with poor drainage D

Question 4

Soil and crop management generally has a greater influence on evaporation from the soil surface (E)than on transpiration (T)from leaf surfaces.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following will increase the evaporation (E)from the soil surface?

Accepted Answer

A) adding straw mulch to the soil surface 
B) the use of no-till culture 
C) stubble mulch farming 
D) plastic mulch 
E) none of the above 
A) adding straw mulch to the soil surface 
B) the use of no-till culture 
C) stubble mulch farming 
D) plastic mulch 
E) none of the above

Question 6

Sprinkle irrigation is generally more efficient in the use of water than drip irrigation,especially for high valued crops.

Accepted Answer

A) True 
 B)False

Question 7

Groundwater _____.

Accepted Answer

A) is a source of water above the vadose zone in a soil 
B) moves downward in the vadose zone through the capillary fringe 
C) moves laterally but not vertically below the soil profile 
D) is found mostly in shallow layers just below the argillic 
E) is a major source of water for irrigation in the United States 
A) is a source of water above the vadose zone in a soil 
B) moves downward in the vadose zone through the capillary fringe 
C) moves laterally but not vertically below the soil profile 
D) is found mostly in shallow layers just below the argillic 
E) is a major source of water for irrigation in the United States

Question 8

Where high-value crops or individual ornamental shrubs are to be grown and water is expensive,the most efficient type of irrigation to use would be ______.

Accepted Answer

A) center pivot 
B) basin flooding 
C) furrow 
D) drip or trickle 
A) center pivot 
B) basin flooding 
C) furrow 
D) drip or trickle

Question 9

Which of the following will not increase the efficiency of water use by plants in an irrigation system?

Accepted Answer

A) The use of concrete-lined delivery ditches 
B) The use of flood irrigation for forage crops 
C) The use of drip irrigation for fruit trees 
D) The use of crop residues to reduce evaporation 
E) The use of herbicides to control weeds 
A) The use of concrete-lined delivery ditches 
B) The use of flood irrigation for forage crops 
C) The use of drip irrigation for fruit trees 
D) The use of crop residues to reduce evaporation 
E) The use of herbicides to control weeds

Question 10

Some 60 percent of the water that is actively involved in the hydrologic cycle worldwide is found in soils.

Accepted Answer

A) True 
 B)False

Question 11

In a field experiment you noted that 300 tons of water was transpired to produce 1 ton of corn (dry weight).If alfalfa had been grown in the same field instead of corn,which of the following would most likely have been the amount of water transpired?

Accepted Answer

A) 500 tons 
B) 300 tons 
C) 275 tons 
D) 250 tons 
E) depends on the climate in the area of the experiment 
A) 500 tons 
B) 300 tons 
C) 275 tons 
D) 250 tons 
E) depends on the climate in the area of the experiment

Question 12

Conservation tillage can have a significant direct effect on transpiration of water from a rapidly growing crop of corn.

Accepted Answer

A) True 
 B)False

Question 13

Some two-thirds of the solar energy reaching the earth is absorbed by water on or near the earth's surface.

Accepted Answer

A) True 
 B)False

Question 14

Early snowfall that arrives before the cold winter weather has frozen the soil generally increases the penetration of water into the soil.

Accepted Answer

A) True 
 B)False

Question 15

Land drainage is beneficial because _____.

Accepted Answer

A) it increases the alternate of expansion and contraction due to freezing and thawing of soils 
B) it increases the water-to-air ratio in the soil pores 
C) it slows down the rate of soil warming in the spring 
D) it increases the depth of root penetration in the soil 
E) it increases the availability of iron and manganese in acid soils 
A) it increases the alternate of expansion and contraction due to freezing and thawing of soils 
B) it increases the water-to-air ratio in the soil pores 
C) it slows down the rate of soil warming in the spring 
D) it increases the depth of root penetration in the soil 
E) it increases the availability of iron and manganese in acid soils

Question 16

The evapotranspiration (ET)from a pine forest was found to be 50 cm during a growing season.If the evaporation from the soil surface during this period of time was 5 cm,what is the level of loss from leaf surfaces?

Accepted Answer

A) 55 cm 
B) 45 cm 
C) 50.0 cm 
D) 10 cm 
E) Impossible to calculate from the data given 
A) 55 cm 
B) 45 cm 
C) 50.0 cm 
D) 10 cm 
E) Impossible to calculate from the data given

Question 17

The most common form of on-site waste water treatment for homes not hooked up to sewer lines is the _______.

Accepted Answer

A) active composting method 
B) septic tank and drain field 
C) chemical "flush" system 
D) electrical induction sterilization 
E) soil enrichment process 
A) active composting method 
B) septic tank and drain field 
C) chemical "flush" system 
D) electrical induction sterilization 
E) soil enrichment process

Question 18

The water potential in soils is generally considered lower than that in the atmosphere.

Accepted Answer

A) True 
 B)False

Question 19

The transpiration ratio of a native meadow is 550 kg per kg of dry matter produced.If 4 Mg of dry matter is produced on a hectare of land,how many centimeters of water will be required (rounded to the nearest cm)?

Accepted Answer

A) 46 
B) 220 
C) 14 
D) 22 
E) Not possible to calculate 
A) 46 
B) 220 
C) 14 
D) 22 
E) Not possible to calculate

Question 20

Atmospheric vapor pressure has little effect on the vapor losses from soil surfaces.

Accepted Answer

A) True 
 B)False

The leaf area index significantly affects the solar radiation reaching the soil surface.

Vapor loss from a south-facing slope in Australia would likely be higher than from a north-facing slope.

Of the various types of drain systems,open ditch systems are most practical and economical for use on __________.

Soil and crop management generally has a greater influence on evaporation from the soil surface (E)than on transpiration (T)from leaf surfaces.

Which of the following will increase the evaporation (E)from the soil surface?

Sprinkle irrigation is generally more efficient in the use of water than drip irrigation,especially for high valued crops.

Groundwater _____.

Where high-value crops or individual ornamental shrubs are to be grown and water is expensive,the most efficient type of irrigation to use would be ______.

Which of the following will not increase the efficiency of water use by plants in an irrigation system?

Some 60 percent of the water that is actively involved in the hydrologic cycle worldwide is found in soils.

In a field experiment you noted that 300 tons of water was transpired to produce 1 ton of corn (dry weight).If alfalfa had been grown in the same field instead of corn,which of the following would most likely have been the amount of water transpired?

Conservation tillage can have a significant direct effect on transpiration of water from a rapidly growing crop of corn.

Some two-thirds of the solar energy reaching the earth is absorbed by water on or near the earth's surface.

Early snowfall that arrives before the cold winter weather has frozen the soil generally increases the penetration of water into the soil.

Land drainage is beneficial because _____.

The evapotranspiration (ET)from a pine forest was found to be 50 cm during a growing season.If the evaporation from the soil surface during this period of time was 5 cm,what is the level of loss from leaf surfaces?

The most common form of on-site waste water treatment for homes not hooked up to sewer lines is the _______.

The water potential in soils is generally considered lower than that in the atmosphere.

The transpiration ratio of a native meadow is 550 kg per kg of dry matter produced.If 4 Mg of dry matter is produced on a hectare of land,how many centimeters of water will be required (rounded to the nearest cm)?

Atmospheric vapor pressure has little effect on the vapor losses from soil surfaces.

The Soils Around Us

Formation of Soils From Parent Materials

Soil Classification

Soil Architecture and Physical Properties

Soil Water: Characteristics and Behavior

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

Soil Erosion and Its Control

Soils and Chemical Pollution

Geographic Information About Soils

Prospects for Global Soil Quality As Affected by Human Activities

Filters

Exam 6: Soil and the Hydrologic Cycle

The leaf area index significantly affects the solar radiation reaching the soil surface.

Vapor loss from a south-facing slope in Australia would likely be higher than from a north-facing slope.

Of the various types of drain systems,open ditch systems are most practical and economical for use on __________.

Soil and crop management generally has a greater influence on evaporation from the soil surface (E)than on transpiration (T)from leaf surfaces.

Which of the following will increase the evaporation (E)from the soil surface?

Sprinkle irrigation is generally more efficient in the use of water than drip irrigation,especially for high valued crops.

Groundwater _____.

Where high-value crops or individual ornamental shrubs are to be grown and water is expensive,the most efficient type of irrigation to use would be ______.

Which of the following will not increase the efficiency of water use by plants in an irrigation system?

Some 60 percent of the water that is actively involved in the hydrologic cycle worldwide is found in soils.

In a field experiment you noted that 300 tons of water was transpired to produce 1 ton of corn (dry weight).If alfalfa had been grown in the same field instead of corn,which of the following would most likely have been the amount of water transpired?

Conservation tillage can have a significant direct effect on transpiration of water from a rapidly growing crop of corn.

Some two-thirds of the solar energy reaching the earth is absorbed by water on or near the earth's surface.

Early snowfall that arrives before the cold winter weather has frozen the soil generally increases the penetration of water into the soil.

Land drainage is beneficial because _____.

The evapotranspiration (ET)from a pine forest was found to be 50 cm during a growing season.If the evaporation from the soil surface during this period of time was 5 cm,what is the level of loss from leaf surfaces?

The most common form of on-site waste water treatment for homes not hooked up to sewer lines is the _______.

The water potential in soils is generally considered lower than that in the atmosphere.

The transpiration ratio of a native meadow is 550 kg per kg of dry matter produced.If 4 Mg of dry matter is produced on a hectare of land,how many centimeters of water will be required (rounded to the nearest cm)?

Atmospheric vapor pressure has little effect on the vapor losses from soil surfaces.

The Soils Around Us

Formation of Soils From Parent Materials

Soil Classification

Soil Architecture and Physical Properties

Soil Water: Characteristics and Behavior

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

Soil Erosion and Its Control

Soils and Chemical Pollution

Geographic Information About Soils

Prospects for Global Soil Quality As Affected by Human Activities

Filters