Soil Horizons and Measurement Concepts

The video tutorial explains the different layers of soil, known as horizons, which include the O horizon (organic layer), A horizon (topsoil), B horizon (subsoil), C horizon (weathered rocks), and bedrock. Each layer has distinct characteristics and functions, such as supporting plant life or containing minerals. The video also introduces the tensiometer, a device used to measure soil moisture.

What is the term used to describe the different layers of soil?

• Horizons

• Strata

• Levels

• Tiers

Which layer is rich in organic materials like grass and decomposed leaves?

• C Horizon

• O Horizon

• B Horizon

• A Horizon

What is another name for the O horizon?

• Subsoil

• Organic Layer

• Bedrock

• Topsoil

Which horizon is known for being soft and porous, supporting plant growth?

• C Horizon

• A Horizon

• O Horizon

• B Horizon

What is the A horizon commonly referred to as?

• Subsoil

• Topsoil

• Bedrock

• Organic Layer

Which layer is characterized by a lighter color due to less organic matter?

• O Horizon

• B Horizon

• A Horizon

• C Horizon

What is the B horizon also known as?

• Topsoil

• Organic Layer

• Bedrock

• Subsoil

Which horizon consists of weathered rocks and lies above the bedrock?

• O Horizon

• C Horizon

• A Horizon

• B Horizon

What materials make up the bedrock layer?

• Sand and clay

• Organic matter

• Weathered rocks

• Basalt, limestone, and granite

Which device is used to measure soil moisture content?

• Hygrometer

• Thermometer

• Tensiometer

• Barometer