11 Questions
What is soil ultimately dependent upon?
the life dependent on it
What determines the balance of soil thickness?
weathering and soil transport
What is the primary factor that affects weathering rates?
precipitation
What is the role of plants in soil formation?
they stabilize soil profiles
What determines the texture of soil?
parental material
What is the effect of darker minerals on soil fertility?
they increase soil fertility
What is the primary factor that determines the rate of soil formation?
Time
What is the typical rate of soil development in centimeters per year?
0.025 cm/yr
What is the name of the soil horizon that consists of organic matter?
O Horizon
What is the diameter of very fine sand in millimeters, according to the USDA Classification?
0.05-0.10 mm
What is the range of diameters for the three fractions of mineral matter in soil?
0.002-2.0 mm
Understand the natural process of soil formation, its thickness, and the balance between weathering and erosion. Learn about the factors affecting soil development and its importance for life on Earth.
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