FAQs
What is the C horizon?
The C horizon is the deepest and least weathered horizon in the soil profile. It is composed of parent material, which is the rock or sediment from which the soil has formed.
How is the C horizon formed?
The C horizon is formed by the physical and chemical weathering of the parent material. Physical weathering breaks down the parent material into smaller pieces, while chemical weathering alters the minerals in the parent material.
What are the characteristics of the C horizon?
The C horizon is typically composed of unconsolidated material, such as sand, silt, clay, or gravel. It is often more compact than the overlying horizons and has a higher concentration of minerals.
What is the role of the C horizon in the soil profile?
The C horizon provides support for the overlying horizons and helps to regulate the movement of water and nutrients through the soil profile. It also serves as a reservoir of nutrients for plants.
How thick is the C horizon?
The thickness of the C horizon varies depending on the type of soil and the degree of weathering. It can range from a few centimeters to several meters thick.
What are some common types of parent material for the C horizon?
Some common types of parent material for the C horizon include granite, sandstone, limestone, shale, and basalt.
How does the C horizon differ from the A and B horizons?
The C horizon differs from the A and B horizons in terms of its composition, structure, and organic matter content. The A horizon is typically composed of topsoil, which is rich in organic matter and has a loose structure. The B horizon is typically composed of subsoil, which is less rich in organic matter and has a more compact structure.
What is the importance of the C horizon in soil science?
The C horizon is important in soil science because it provides information about the soil’s parent material and the degree of weathering that has occurred. It also helps to determine the soil’s suitability for agriculture and other land uses.