Soil Composition/Soil Profile

Front

What is the subsoil layer in the soil profile?

Back

Horizon B

Front

Order the sediment particle sizes from smallest to largest: clay, silt, sand.

Back

Clay, silt, sand

Front

Which horizon represents organic material in the soil profile?

Back

Horizon O (Humus)

Front

What does the C Horizon contain?

Back

Partly weathered rock

Front

What is soil?

Back

A loose mixture of rock particles, organic material (humus), water, and air that supports the growth of vegetation.

Front

What is Horizon O also known as?

Back

Humus

Front

What is the top layer of soil called?

Back

Horizon A

Front

What is the bedrock layer in the soil profile?

Back

The layer of solid rock beneath the soil layers.

Front

What is the main function of soil?

Back

To support the growth of plants by providing nutrients and water.

Front

What is loam?

Back

A type of soil that is a mixture of sand, silt, and clay, ideal for growing plants.