Soil

Front

What is the layer of soil just below the topsoil?

Back

Subsoil

Front

Which layer of soil do plant roots primarily grow in?

Back

Topsoil

Front

What is the common name for Horizon A in soil layers?

Back

Topsoil

Front

Which type of soil has the lowest rate of permeability?

Back

Clay

Front

What factors are primarily responsible for the decomposition of organic materials in soil?

Back

Fungus action and microorganisms

Front

What is the top layer of soil called that is rich in organic material?

Back

Topsoil

Front

What is the process by which soil is formed from rocks and organic matter?

Back

Soil formation

Front

What is the term for the layer of soil that is made up of weathered rock?

Back

Subsoil

Front

What is humus and why is it important for soil?

Back

Humus is decomposed organic matter that enriches soil and improves its structure.

Front

What is the role of microorganisms in soil?

Back

Microorganisms help decompose organic matter and recycle nutrients.