Question 1

Corn plants are generally more efficient in the use of water than is alfalfa.

Accepted Answer

A) True 
 B)False  True

Question 2

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 D

Question 3

Drip irrigation would more likely be used in the production of apples or peaches than in the production of wheat.

Accepted Answer

A) True 
 B)False  True

Question 4

Which of the following would you expect to have the highest leaf area index?

Accepted Answer

A)  Bare fallowed area 
B)  Corn three weeks after planting 
C)  Corn, knee high 
D)  Alfalfa just before harvest 
E)  Either B or C (equal) 
A)  Bare fallowed area 
B)  Corn three weeks after planting 
C)  Corn, knee high 
D)  Alfalfa just before harvest 
E)  Either B or C (equal)

Question 5

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

Question 6

The average residence time for water in clouds over the ocean is about one year.

Accepted Answer

A) True 
 B)False

Question 7

Eutrophication is enhanced by the presence of pesticides in the water draining from agricultural soils.

Accepted Answer

A) True 
 B)False

Question 8

Evapotranspiration includes vapor losses both from the soil surface and from the leaves of plants.

Accepted Answer

A) True 
 B)False

Question 9

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 10

Which of the following sources of water have the shortest average residence time?

Accepted Answer

A)  Soil moisture 
B)  Clouds. 
C)  Oceans and ice caps 
D)  groundwater 
A)  Soil moisture 
B)  Clouds. 
C)  Oceans and ice caps 
D)  groundwater

Question 11

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 12

The expression, P - ET -SS estimates the ________ a watershed.

Accepted Answer

A)  soil water content of 
B)  discharge volume from 
C)  evaporation from 
D)  interception in 
A)  soil water content of 
B)  discharge volume from 
C)  evaporation from 
D)  interception in

Question 13

Which of the following is not true with respect to the hydrologic cycle?

Accepted Answer

A)  More than 85% of the water evaporated from the earth's surface comes from oceans. 
B)  There is a net migration of some 40,000 km3 of water in clouds from the land area to the ocean areas. 
C)  The average residence time of water in clouds is about 10 days. 
D)  Some 78% of the total precipitation falls onto the oceans. 
E)  About one third of the readily accessible water in the hydrologic cycle is in the soil. 
A)  More than 85% of the water evaporated from the earth's surface comes from oceans. 
B)  There is a net migration of some 40,000 km3 of water in clouds from the land area to the ocean areas. 
C)  The average residence time of water in clouds is about 10 days. 
D)  Some 78% of the total precipitation falls onto the oceans. 
E)  About one third of the readily accessible water in the hydrologic cycle is in the soil.

Question 14

There is a net movement of clouds from land areas to the ocean areas in the hydrologic cycle.

Accepted Answer

A) True 
 B)False

Question 15

Evaporation from the soil surface (E) is determined to a large degree by soil surface wetness.

Accepted Answer

A) True 
 B)False

Question 16

Most irrigation systems are very inefficient with less than half the water that is taken from streams

Accepted Answer

A) True 
 B)False

Question 17

The water potential at the leaf surfaces expressed in kPa is most likely to be _____.

Accepted Answer

A)  -10 
B)  33 
C)  -33 
D)  -500 
E)  -31,000 
A)  -10 
B)  33 
C)  -33 
D)  -500 
E)  -31,000

Question 18

Recent research with annual crops such as wheat, sunflower and sorghum in the Great Plains region suggests that, compared to continuous cropping, soil quality, crop productivity and farm profitability are likely to be greater when crops are grown in a field only every second year with the soil keep free of weeds in the non-crop year by repeated cultivation of herbicide application.

Accepted Answer

A) True 
 B)False

Question 19

If the average transpiration (T) loss from leaf surfaces in a particular watershed is 10 mm/day, you expect the evaporation (E) from the soil surface to be _____.

Accepted Answer

A)  10 mm/ day 
B)  5 mm/ day 
C)  15 mm/day 
D)  100 mm/day 
E)  Impossible to calculate from the data given 
A)  10 mm/ day 
B)  5 mm/ day 
C)  15 mm/day 
D)  100 mm/day 
E)  Impossible to calculate from the data given

Question 20

The pollution of ground water is often increased by the presence of macropores in soils.

Accepted Answer

A) True 
 B)False

Corn plants are generally more efficient in the use of water than is alfalfa.

Land drainage is beneficial because _____.

Drip irrigation would more likely be used in the production of apples or peaches than in the production of wheat.

Which of the following would you expect to have the highest leaf area index?

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

The average residence time for water in clouds over the ocean is about one year.

Eutrophication is enhanced by the presence of pesticides in the water draining from agricultural soils.

Evapotranspiration includes vapor losses both from the soil surface and from the leaves of plants.

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 sources of water have the shortest average residence time?

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 ______.

The expression, P - ET -SS estimates the ________ a watershed.

Which of the following is not true with respect to the hydrologic cycle?

There is a net movement of clouds from land areas to the ocean areas in the hydrologic cycle.

Evaporation from the soil surface (E) is determined to a large degree by soil surface wetness.

Most irrigation systems are very inefficient with less than half the water that is taken from streams

The water potential at the leaf surfaces expressed in kPa is most likely to be _____.

If the average transpiration (T) loss from leaf surfaces in a particular watershed is 10 mm/day, you expect the evaporation (E) from the soil surface to be _____.

The pollution of ground water is often increased by the presence of macropores in soils.

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, Alkalinity, Aridity and Salinity

Organisms and Ecology of the Soil

Soil Organic Matter Overview

Nutrient Cycles and Soil Fertility

Practical Nutrient Management

Soil Erosion and Its Control

Soils and Chemical Pollution

Filters

Exam 6: Soil and the Hydrologic Cycle

Corn plants are generally more efficient in the use of water than is alfalfa.

Land drainage is beneficial because _____.

Drip irrigation would more likely be used in the production of apples or peaches than in the production of wheat.

Which of the following would you expect to have the highest leaf area index?

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

The average residence time for water in clouds over the ocean is about one year.

Eutrophication is enhanced by the presence of pesticides in the water draining from agricultural soils.

Evapotranspiration includes vapor losses both from the soil surface and from the leaves of plants.

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 sources of water have the shortest average residence time?

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 ______.

The expression, P - ET -SS estimates the ________ a watershed.

Which of the following is not true with respect to the hydrologic cycle?

There is a net movement of clouds from land areas to the ocean areas in the hydrologic cycle.

Evaporation from the soil surface (E) is determined to a large degree by soil surface wetness.

Most irrigation systems are very inefficient with less than half the water that is taken from streams

The water potential at the leaf surfaces expressed in kPa is most likely to be _____.

If the average transpiration (T) loss from leaf surfaces in a particular watershed is 10 mm/day, you expect the evaporation (E) from the soil surface to be _____.

The pollution of ground water is often increased by the presence of macropores in soils.

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, Alkalinity, Aridity and Salinity

Organisms and Ecology of the Soil

Soil Organic Matter Overview

Nutrient Cycles and Soil Fertility

Practical Nutrient Management

Soil Erosion and Its Control

Soils and Chemical Pollution

Filters