Soil Composition/Soil Profile

Front

What are the layers of soil known as?

Back

Soil Horizons

Front

Which of the following is NOT one of the three types of soil? clay, sand, silt, mud

Back

mud

Front

What is humus?

Back

Organic matter that is formed from the decomposition of plant and animal material.

Front

Which layer is the subsoil? Horizon O, Horizon A, Horizon B, Horizon C, Horizon R

Back

Horizon B

Front

Which horizon contains partly weathered rock?

Back

C Horizon

Front

What is the top layer of soil called?

Back

Horizon O (Organic layer)

Front

What is the main component of soil?

Back

Minerals, organic matter, water, and air.

Front

What type of soil is known for its ability to retain water?

Back

Clay soil.

Front

What is the process of soil formation called?

Back

Pedogenesis.

Front

What is the role of earthworms in soil?

Back

They aerate the soil and help in the decomposition of organic matter.