Based on the given information, Candace can complete the table as follows:
Horizon Description
O Organic layer
A Topsoil
B Subsoil
C Weathered rock particles
R Bedrock
This table provides a brief description of each horizon in a soil profile.
- O Horizon (Organic layer): This layer consists of decomposed organic material such as leaves, plant debris, and humus. It is rich in nutrients and contributes to soil fertility.
- A Horizon (Topsoil): The topsoil is the uppermost layer that contains a mixture of organic matter, minerals, and nutrients. It is crucial for plant growth and supports the majority of plant roots.
- B Horizon (Subsoil): The subsoil is located beneath the topsoil and contains less organic matter. It consists of mineral deposits, clay, and dissolved materials leached down from the upper layers.
- C Horizon (Weathered rock particles): The C horizon is composed of weathered rock particles that have undergone some degree of decomposition. It contains broken-down rocks, minerals, and fragments.
- R Horizon (Bedrock): The bedrock is the solid, unweathered layer of rock that underlies all other horizons. It serves as the parent material from which soil is formed through the process of weathering and erosion.
By completing this table, Candace can have a clear understanding of the different horizons in a soil profile and their respective characteristics.