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- 1. Multiple Choice
Which of the soil layers in the picture is the C horizon?
A
B
C
D
- 2. Multiple Choice
Topsoil layer (O) that has humus is good for planting trees because it has a lot of________ matter.
inorganic
organic
chemical
mineral
- 3. Multiple Choice
What is the last paragraph mainly about?
Thickness of each soil layer depends on humidity, geologic at processes and the depth of the B horizon.
Thickness of each soil layer depends on topography, geologic at processes and the depth of the B horizon.
Thickness of each soil layer depends on topography, geologic at processes and the depth of the C horizon.
Thickness of each soil layer depends on humidity, geologic at processes and the depth of the C horizon.
- 4. Multiple Choice
Which is the best title for the passage?
Soil layers
Soil types
Soil structure
Soil conservation
- 5. Multiple Choice
The word ‘excavate’ means __________.
to dig a hole
to plant a tree
to make a pottery
to measure humidity
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