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The soil shown in time 2 was formed mainly by
bedrock composition and climate characteristics
soils
A
weathering and biological activity
an increase in biologic activity
little humus present
rock salt
weathering and biological activity
Which soil horizon contains the greatest amount of material formed by biological activity?
bedrock composition and climate characteristics
soils
A
weathering and biological activity
an increase in biologic activity
little humus present
rock salt
weathering and biological activity
The formation of soil is primarily the result of
bedrock composition and climate characteristics
soils
A
weathering and biological activity
an increase in biologic activity
little humus present
rock salt
weathering and biological activity
Which change would cause the topsoil in West Virginia to increase in thickness?
bedrock composition and climate characteristics
soils
A
weathering and biological activity
an increase in biologic activity
little humus present
rock salt
weathering and biological activity
Which factors most directly control the development of soils?
bedrock composition and climate characteristics
soils
A
weathering and biological activity
an increase in biologic activity
little humus present
rock salt
weathering and biological activity
Humus, which is formed by the decay of plant and animal matter, is important for the formation of most
bedrock composition and climate characteristics
soils
A
weathering and biological activity
an increase in biologic activity
little humus present
rock salt
weathering and biological activity
Which substance found in a soil sample collected in an arid region would most likely be absent in a soil sample collected in a humid region?
bedrock composition and climate characteristics
soils
A
weathering and biological activity
an increase in biologic activity
little humus present
rock salt
weathering and biological activity
The graph supports the conclusion that soils in regions with average annual temperatures above 25°C have
bedrock composition and climate characteristics
soils
A
weathering and biological activity
an increase in biologic activity
little humus present
rock salt
weathering and biological activity
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