EVR 1001 Chapter 7 Complete Actual set
with Questions and correct/verified
Answers
Normal Borlaug, who passed away in 2009, pioneered the development of ________.
A) GM crops
B) organic agriculture
C) high-yield wheat
D) monoculture farming
E) IPM - ANSWER-C) high-yield wheat
Compare the world population index for 1960 to the world population index for 2000. Then express the
world population in 2000 as a percentage of world population in 1960.
A) 200%
B) 400%
C) 100%
D) 50% - ANSWER-A) 200%
Now compare fertilizer use in 1960 to fertilizer use in 2000. Express the year 2000 N fertilizer use as a
percentage of N fertilizer use in 1960.
A) 67%
B) 15%
C) 667%
D) 7% - ANSWER-C) 667%
In 1960 the ratio of food production to N fertilizer use was 40:15 or 2.7:1. By 2000 the ratio was 1:1. The
efficiency of N use in agriculture _____.
A) there is not enough data to determine the ANSWER.
B) stayed the same—the amount of food produced with a unit of N fertilizer has stayed the same over
time
C) decreased—over time we have produced less food with the same amount of N fertilizer
D) increased—over time we have produced more food with the same amount of N fertilizer - ANSWER-C)
decreased—over time we have produced less food with the same amount of N fertilizer
Calculate the ratio of the agricultural land index to the population index for 1960 and compare it to the
ratio for 2000. The ratios suggest that _____.
A) the per capita demand on agricultural land has decreased over time
B) there is no relationship between agricultural land and population
C) the per capita demand on agricultural land has increased over time
D) the per capita demand on agricultural land has stayed the same over time - ANSWER-C) the per capita
demand on agricultural land has increased over time
Demographers predict that global population will continue to increase. As population increases, which of
the following statements represents future agricultural changes for maintaining an adequate food
supply?
, A) Higher agricultural land-to-population ratio
B) Higher food production per unit of agricultural land
C) Higher food production due to greater use of N fertilizer
D) Lower use of N fertilizer per unit of land - ANSWER-B) Higher food production per unit of agricultural
land
1. Diabetes and cardiovascular disease can be caused by chronic __________.
2. __________ occurs in people who consume adequate calories but lack essential nutrients, such as
vitamins and minerals.
3. The condition ___________ occurs in people whose diets include ample calories but very low levels of
essential amino acids and proteins.
4. People who regularly lack access to sufficient food calories suffer from ____________.
5. Inadequate caloric intake coupled with protein deficiency leads to the condition _____________. -
ANSWER-1. overnutrition
2. malnutrition
3. kwashiorkor
4. overnutrition
5. marasmus
The breakdown of large rocks into smaller pieces is ________.
A) primarily caused by topsoil erosion
B) unaffected by winds
C) called mineralization
D) affected by rainfall, freezing and thawing
E) a major cause of topsoil erosion - ANSWER-D) affected by rainfall, freezing and thawing
1. Organic (litter layer)
2. Topsoil
3. Eluviated (leaching layer)
4. Subsoil
5. Rock (parent material) - ANSWER-1. This layer consists of plant residue atop the soil surface. On a
forest floor, it may be leaves and twigs. In a field, it may be crop residue left after harvest.
2. This layer consists of organic matter, humus, and inorganic minerals. It facilitates plant rooting, has
high nutrient content, and holds water.
3. This layer loses minerals and organic matter to the layer beneath it.
4. This layer accumulates minerals and organic matter leacher from upper soil layers.
5. This layer forms the base geological material in a particular location; it is sometimes called bedrock.
Approximately how much more soil was lost using conventional tillage rather than reduced tillage?
A) 5,000 kg/ha
B) 16,000 kg/ha
C) 160 kg/ha
D) 50 kg/ha - ANSWER-A) 5,000 kg/ha
How much more organic carbon would be saved annually by using reduced tillage?
A) 7,000 g/ha
B) 12,000 g/ha
C) 70 kg/ha
D) 120 kg/ha - ANSWER-C) 70 kg/ha
with Questions and correct/verified
Answers
Normal Borlaug, who passed away in 2009, pioneered the development of ________.
A) GM crops
B) organic agriculture
C) high-yield wheat
D) monoculture farming
E) IPM - ANSWER-C) high-yield wheat
Compare the world population index for 1960 to the world population index for 2000. Then express the
world population in 2000 as a percentage of world population in 1960.
A) 200%
B) 400%
C) 100%
D) 50% - ANSWER-A) 200%
Now compare fertilizer use in 1960 to fertilizer use in 2000. Express the year 2000 N fertilizer use as a
percentage of N fertilizer use in 1960.
A) 67%
B) 15%
C) 667%
D) 7% - ANSWER-C) 667%
In 1960 the ratio of food production to N fertilizer use was 40:15 or 2.7:1. By 2000 the ratio was 1:1. The
efficiency of N use in agriculture _____.
A) there is not enough data to determine the ANSWER.
B) stayed the same—the amount of food produced with a unit of N fertilizer has stayed the same over
time
C) decreased—over time we have produced less food with the same amount of N fertilizer
D) increased—over time we have produced more food with the same amount of N fertilizer - ANSWER-C)
decreased—over time we have produced less food with the same amount of N fertilizer
Calculate the ratio of the agricultural land index to the population index for 1960 and compare it to the
ratio for 2000. The ratios suggest that _____.
A) the per capita demand on agricultural land has decreased over time
B) there is no relationship between agricultural land and population
C) the per capita demand on agricultural land has increased over time
D) the per capita demand on agricultural land has stayed the same over time - ANSWER-C) the per capita
demand on agricultural land has increased over time
Demographers predict that global population will continue to increase. As population increases, which of
the following statements represents future agricultural changes for maintaining an adequate food
supply?
, A) Higher agricultural land-to-population ratio
B) Higher food production per unit of agricultural land
C) Higher food production due to greater use of N fertilizer
D) Lower use of N fertilizer per unit of land - ANSWER-B) Higher food production per unit of agricultural
land
1. Diabetes and cardiovascular disease can be caused by chronic __________.
2. __________ occurs in people who consume adequate calories but lack essential nutrients, such as
vitamins and minerals.
3. The condition ___________ occurs in people whose diets include ample calories but very low levels of
essential amino acids and proteins.
4. People who regularly lack access to sufficient food calories suffer from ____________.
5. Inadequate caloric intake coupled with protein deficiency leads to the condition _____________. -
ANSWER-1. overnutrition
2. malnutrition
3. kwashiorkor
4. overnutrition
5. marasmus
The breakdown of large rocks into smaller pieces is ________.
A) primarily caused by topsoil erosion
B) unaffected by winds
C) called mineralization
D) affected by rainfall, freezing and thawing
E) a major cause of topsoil erosion - ANSWER-D) affected by rainfall, freezing and thawing
1. Organic (litter layer)
2. Topsoil
3. Eluviated (leaching layer)
4. Subsoil
5. Rock (parent material) - ANSWER-1. This layer consists of plant residue atop the soil surface. On a
forest floor, it may be leaves and twigs. In a field, it may be crop residue left after harvest.
2. This layer consists of organic matter, humus, and inorganic minerals. It facilitates plant rooting, has
high nutrient content, and holds water.
3. This layer loses minerals and organic matter to the layer beneath it.
4. This layer accumulates minerals and organic matter leacher from upper soil layers.
5. This layer forms the base geological material in a particular location; it is sometimes called bedrock.
Approximately how much more soil was lost using conventional tillage rather than reduced tillage?
A) 5,000 kg/ha
B) 16,000 kg/ha
C) 160 kg/ha
D) 50 kg/ha - ANSWER-A) 5,000 kg/ha
How much more organic carbon would be saved annually by using reduced tillage?
A) 7,000 g/ha
B) 12,000 g/ha
C) 70 kg/ha
D) 120 kg/ha - ANSWER-C) 70 kg/ha
