The video tutorial explains the two main layers of soil: mulch and subsoil. The mulch layer, rich in humus, contains nutrients essential for plant growth. It varies in depth and is darker in color. Below the mulch is the subsoil, which is lighter and lacks humus. Beneath the subsoil lies the bedrock, a solid rock layer.

What are the two main layers of soil mentioned in the video?

• Mulch and Bedrock

• Humus and Bedrock

• Mulch and Subsoil

• Subsoil and Bedrock

What is humus primarily composed of?

• Sand and clay

• Minerals and water

• Rocks and pebbles

• Decomposed plants and animals

How does the depth of the mulch layer vary?

• It is always a few centimeters

• It does not vary

• It can range from a few centimeters to several meters

• It is always several meters

What is a characteristic of the subsoil layer?

• It is made of decomposed plants

• It is lighter in color

• It contains a lot of humus

• It is darker than mulch

What lies beneath the subsoil layer?

• A layer of humus

• A layer of solid rock

• A layer of sand

• Another layer of mulch