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Soil Formation and Thickness

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Questions and Answers

What is soil ultimately dependent upon?

the forces of nature

its thickness

the life dependent on it (correct)

the productivity of the Earth's skin

What determines the balance of soil thickness?

climate and organisms

weathering and soil transport (correct)

rock erosion and soil transport

storage input and output

What is the primary factor that affects weathering rates?

temperature

type of native vegetation

precipitation (correct)

parental material

What is the role of plants in soil formation?

they stabilize soil profiles Signup and view all the answers

What determines the texture of soil?

parental material Signup and view all the answers

What is the effect of darker minerals on soil fertility?

they increase soil fertility Signup and view all the answers

What is the primary factor that determines the rate of soil formation?

Time Signup and view all the answers

What is the typical rate of soil development in centimeters per year?

0.025 cm/yr Signup and view all the answers

What is the name of the soil horizon that consists of organic matter?

O Horizon Signup and view all the answers

What is the diameter of very fine sand in millimeters, according to the USDA Classification?

0.05-0.10 mm Signup and view all the answers

What is the range of diameters for the three fractions of mineral matter in soil?

0.002-2.0 mm Signup and view all the answers