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WorksheetsENV 07 Soil and Ag
Total questions: 23
Worksheet time: 45mins
Name
Class
Date
1.
Why is it important to preserve farmland?
a)
Farmland provides crops and fruits to support urban and rural populations.
b)
Farmland provides most of the oxygen for urban areas.
c)
Farmland controls the temperature of urban areas.
d)
All of these
2.
Which of the following statements about tree harvesting methods is correct?
a)
Selective cutting minimizes the impact on forest ecosystems.
b)
Clear-cutting is quick but is more expensive than other methods.
c)
Selective cutting eliminates the possibility of soil erosion.
d)
Clear-cutting requires the most road building due to the large number of trees harvested.
3.
Which of the following is NOT an environmental effect of deforestation?
a)
re-planting of trees
b)
reduction of wildlife habitat
c)
loss of topsoil
d)
soil erosion
4.
Which of the following allows forests the best recovery after tree harvesting?
a)
cutting only medium-age or mature trees
b)
cutting all of the trees and then replanting the area with seedlings
c)
allowing the forest to reseed itself
d)
cutting only young trees and then replacing them with seedlings
5.
Deforestation is an especially serious problem in tropical rain forests because
a)
farmers must repeatedly clear additional forest area to obtain land that can support crops.
b)
it takes so long for the replacement seedlings to reach maturity due to the hot climate.
c)
they are located in developed nations with high per person resource consumption.
d)
the downed trees are left to rot, damaging the soil.
6.
What is a complex plant-supporting system made up of disintegrated rock, water, gases, nutrients, and microorganisms?
a)
Soil
b)
Tilling
c)
Feedlot
d)
Loam
7.
Using a source other than precipitation to water crops is known as
a)
Irrigation
b)
Pollination
c)
Green revolution
d)
Cover crop
8.
About how much of Earth’s land surface is used for agriculture?
a)
38%
b)
28%
c)
18%
d)
08%
9.
Choose 3: Traditional agriculture may use which of the following
a)
Teams of work animals
b)
Irrigation by hand
c)
Fossil fuels
d)
Organic fertilizer
10.
What do we call the physical and chemical processes that break down rocks and minerals into smaller particles?
a)
Weathering
b)
Irrigation
c)
Crop yield
d)
Litter layer
11.
Humus, he organic matter in soil, includes
a)
Living and decomposing organisms
b)
Minerals
c)
Bedrock
d)
Living organisms only
12.
What does soil horizon 1 represent?
a)
Litter layer
b)
Topsoil
c)
Subsoil
d)
Bedrock or parent material
13.
What does soil horizon 2 represent?
a)
Litter layer
b)
Topsoil
c)
Subsoil
d)
Bedrock or parent material
14.
What does soil horizon 4 represent?
a)
Litter layer
b)
Topsoil
c)
Subsoil
d)
Bedrock or parent material
15.
Which soil characteristic describes the ARRANGEMENT of soil particles?
a)
Color
b)
pH
c)
Texture
d)
Structure
16.
Which soil characteristic describes the SIZE of soil particles?
a)
Color
b)
pH
c)
Texture
d)
Structure
17.
Poor farming techniques can lead to
a)
Erosion
b)
Overgrazing
c)
Shortage of eggs
d)
Increase storms
18.
Which U.S. policy began to work with farmers to develop conservation plans for their farms, like paying farmers NOT to plant, so the soil had time to recover?
a)
Soil Conservation Service (SCS)
b)
U.S. Department of Agriculture
c)
Food to Table Organization
d)
Centers for Disease Control (CDC)
19.
What can be done to sustain the productivity of rangeland (that is, keep it healthy and able to support agriculture)?
a)
All of these
b)
Limit herd size to prevent overgrazing
c)
Leave the land fallow (unplanted) so the soil has time to recover
d)
Eliminate invasive non-native plants.
20.
Which soil conservation technique is shownhere, used to prevent erosion on steep hills?
a)
Terracing
b)
Contour farming
c)
No-till farming
d)
Shelterbelts
21.
Which soil conservation technique is shown here, to keep soil from eroding down gentle slopes?
a)
Contour farming
b)
No-till farming
c)
Terracing
d)
Shelterbelts
22.
Which soil conservation technique is shown here, to protect crops and soil from strong winds??
a)
Shelterbelts
b)
No-till farming
c)
Terracing
d)
Contour farming
23.
After something like a natural disaster kills all vegetation and strips away topsoil (leaving bare rock), tiny, tough plants and lichen are the first organisms that return to the area to start breaking down the rock to form new soil. The formation of NEW soil is the first step in
a)
Primary succession
b)
Secondary succession
c)
Natural selection
d)
Climax community
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