PLS Day #4- Soil Profile

What is a soil profile?

• A circular section of the soil

• A diagonal section of the soil

• A vertical section of the soil

• A horizontal section of the soil

Which layer of soil is rich in organic material and known as the humus layer?

• C-Horizon

• B-Horizon

• A-Horizon

• O-Horizon

What is the main composition of the O-Horizon?

• Clay soil

• Broken bedrock

• Minerals and metal salts

• Organic materials such as dried leaves and grasses

Which layer is known as the subsoil?

• C-Horizon

• O-Horizon

• B-Horizon

• A-Horizon

Which horizon is composed of nutrients leached from the O and A horizons?

• O-Horizon

• A-Horizon

• E-Horizon

• B-Horizon

Which layer is also known as saprolite?

• C-Horizon

• B-Horizon

• A-Horizon

• O-Horizon

Which horizon is primarily composed of weathered parent material?

• O-Horizon

• A-Horizon

• C-Horizon

• B-Horizon

Which layer is known for its high concentration of clay and iron oxides?

• O-Horizon

• A-Horizon

• B-Horizon

• C-Horizon

What is the primary function of the A-Horizon in soil?

• To store organic material

• To act as a barrier for roots

• To support plant growth with nutrients

• To provide a habitat for microorganisms

Which horizon is also known as the topsoil?

• O-Horizon

• A-Horizon

• B-Horizon

• C-Horizon