Understanding Soil Horizons

What is the primary composition of Horizon O?

• Broken bedrock

• Iron and aluminum silicates

• Organic material like dead leaves and twigs

• Sand and clay

Which horizon is commonly referred to as topsoil?

• Horizon O

• Horizon A

• Horizon B

• Horizon E

What is a characteristic feature of Horizon E?

• Contains broken bedrock

• High in organic material

• Lighter in color and high in nutrients

• Made of compacted bedrock

Where do the roots of large trees typically end?

• Horizon C

• Horizon B

• Horizon R

• Horizon A

Which horizon is made up of broken bedrock?

• Horizon O

• Horizon E

• Horizon A

• Horizon C