Horticulture Soils

What is the layer of soil just below the topsoil?

• soil

• subsoil

• topsoil

• terrace farming

Which layer of soil are these roots growing in?

• subsoil
• topsoil

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

• sand
• silt
• clay
• humus

Tags

NGSS.MS-LS2-3

Which layer is the bottom of the soil profile?

• C - Partially Weathered Parent Material
• D - Separated rock
• R - Bedrock
• A - Topsoil

Layers of soil are also known as:

• Soil Profiles
• Soil Horizons
• Soil sheets
• Soil cores

In which layer of the soil profile contains the MOST humus?

• Layer 1 (A)
• Layer 2 (B)
• Layer 3 (C)
• Layer 4 (R)

Tags

NGSS.MS-LS2-3

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

An organism, especially a soil bacterium or fungus, that breaks down organic material is a...

• Decomposer

• Burrower

• Humus source

Tags

NGSS.MS-LS2-3

Which of the following is NOT one of the three layers of soil?

• topsoil
• undersoil
• subsoil
• bedrock

What layer of soil is in the middle?

• topsoil
• bedrock
• minerals
• subsoil