Question 1

Steep slopes tend to develop thicker soils than level ground.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following areas has the highest risk of desertification?

Accepted Answer

A) The Sahel (Sub-Saharan Africa). 
B) Northeastern Australia. 
C) Central Asia. 
D) Venezuela.

Question 3

In Russia and Ukraine which describes the grassland soils of the "fertile triangle"?

Accepted Answer

A) Chernozems (Mollisols). 
B) Too cool,too dry,too rugged,and poor soil fertility. 
C) Highly weathered forest soils. 
D) Recent,or undeveloped soils.

Question 4

Irrigated land accounts for only about 4 percent of the world's food harvests.

Accepted Answer

A) True 
 B)False

Question 5

The Canadian System of soil classification has not been updated since the mid-1970s.

Accepted Answer

A) True 
 B)False

Question 6

What do recent compilations of soil data from around the world show?

Accepted Answer

A) That soil erosion under conventional agriculture exceeds both the rates of soil production and geological erosion rates by several orders of magnitude. 
B) That soil erosion,once a problem for all,is now under control in many countries. 
C) That soil erosion is greatest in arid countries where there are annual water deficits. 
D) That the southern hemisphere has learned to manage soil erosion,while in the northern hemisphere it is still a major problem.

Question 7

Which is a roughly equal mix of sand,silt,and clay?

Accepted Answer

A) Humus. 
B) Regolith. 
C) Solum. 
D) Loam.

Question 8

The organic rich horizon found at the top of the soil profile is which horizon?

Accepted Answer

A) 
A)  
B) O) 
C) Ae. 
D) 
B)

Question 9

Regarding soil-formation,which of the following best describes the role of climate?

Accepted Answer

A) Because all soils are ancient,they show the climatic conditions of the period in which they formed. 
B) Of the five principle soil-forming factors,climate is the least significant with little correlation between soil and climates worldwide. 
C) Temperature and moisture determine the chemical reactions,organic activity,and water movement within soils. 
D) Relative humidity and atmospheric pressure are the dormant climatic factors that influence soil development.

Question 10

Which is a soil that is 40% sand,40% silt,and 20% clay?

Accepted Answer

A) Loam. 
B) Silty clay. 
C) Silt loam. 
D) Clay loam.

Question 11

Which is the most recent addition to Soil Classification System?

Accepted Answer

A) Luvisolic. 
B) Vertisolic. 
C) Cryosolic. 
D) Chernozemic.

Question 12

Thawing of Cryosolic soils (Gelisols)caused by warming climates could result in the release of carbon dioxide and methane to the atmosphere.

Accepted Answer

A) True 
 B)False

Question 13

Describe the Canadian System of Soil Classification.

Accepted Answer

The answer of Describe the Canadian System of Soil Classification....

Question 14

Which is the multiyear period of severe wind erosion and soil loss that occurred in the Prairies and Great Plains during the 1930s?

Accepted Answer

A) Desertification. 
B) The Grapes of Wrath. 
C) The Black Blizzard. 
D) The Dust Bowl.

Question 15

How do carbon dioxide concentrations in soil compare to concentrations in the atmosphere?

Accepted Answer

A) Carbon dioxide in the soil is lower than in the atmosphere because of transpiration. 
B) Carbon dioxide in the soil is lower than in the atmosphere because of plant photosynthesis. 
C) Carbon dioxide in the soil is higher than in the atmosphere because of ongoing respiration in the ground. 
D) Carbon dioxide in the soil is higher than in the atmosphere because of decay of dead plants and animals.

Question 16

Which of the following factors contribute to desertification?

Accepted Answer

A) Overgrazing,no-till agriculture,and salinization. 
B) No-till agriculture,salinization,and climate change. 
C) Salinization,climate change,and overgrazing. 
D) Climate change,overgrazing,and no-till agriculture.

Question 17

In terms of pedogenic regimes,which is the leaching process in humid and warm climates?

Accepted Answer

A) Laterization. 
B) Salinization. 
C) Calcification. 
D) Podzolization.

Question 18

In which would a particle .07 mm in diameter be classified?

Accepted Answer

A) Cobble. 
B) Sand. 
C) Silt. 
D) Clay.

Question 19

Soil science is an interdisciplinary study that incorporates aspects of physics,chemistry,biology,mineralogy,hydrology,taxonomy,climatology,and cartography.Briefly describe how these various fields may be beneficial to the study of soils.

Accepted Answer

The answer of Soil science is an interdisciplinary study that...

Question 20

Which is the lowest and most precise level of the Canadian System of Soil Classification?

Accepted Answer

A) Soil family. 
B) Soil order. 
C) Soil series. 
D) Soil group.

Exam 18: The Geography of Soils

Steep slopes tend to develop thicker soils than level ground.

Which of the following areas has the highest risk of desertification?

In Russia and Ukraine which describes the grassland soils of the "fertile triangle"?

Irrigated land accounts for only about 4 percent of the world's food harvests.

The Canadian System of soil classification has not been updated since the mid-1970s.

What do recent compilations of soil data from around the world show?

Which is a roughly equal mix of sand,silt,and clay?

The organic rich horizon found at the top of the soil profile is which horizon?

Regarding soil-formation,which of the following best describes the role of climate?

Which is a soil that is 40% sand,40% silt,and 20% clay?

Which is the most recent addition to Soil Classification System?

Thawing of Cryosolic soils (Gelisols)caused by warming climates could result in the release of carbon dioxide and methane to the atmosphere.

Describe the Canadian System of Soil Classification.

Which is the multiyear period of severe wind erosion and soil loss that occurred in the Prairies and Great Plains during the 1930s?

How do carbon dioxide concentrations in soil compare to concentrations in the atmosphere?

Which of the following factors contribute to desertification?

In terms of pedogenic regimes,which is the leaching process in humid and warm climates?

In which would a particle .07 mm in diameter be classified?

Soil science is an interdisciplinary study that incorporates aspects of physics,chemistry,biology,mineralogy,hydrology,taxonomy,climatology,and cartography.Briefly describe how these various fields may be beneficial to the study of soils.

Which is the lowest and most precise level of the Canadian System of Soil Classification?