Soil Forming Factors

Which of the following is the most important soil formation factor

• Time
• Climate
• Slope
• Organisms

Which type of climate will have faster chemical weathering?

• Hot and Wet
• Cold and Dry
• Hot and Cold
• Cold and Wet

What are the three soil particles that we use to classify soils?

• sand, dirt, and soil
• clay, sand, and silt
• silt, loam, and sandy loam
• clay, salt, and pebbles

What is the layer of soil that contains humus, leaf litter, and other organic matter?

• O - Organic
• A - Topsoil
• B - Subsoil
• R - Bedrock

Layers of soil are also known as:

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

Which layer of soil is also known as the zone of the accumulation and contains clay-like minerals?

• A - Topsoil
• O - Organic
• B - Subsoil
• C - Partially Weathered Parent Material

Name the soil horizon: R Horizon

• organic layer
• bedrock
• parent material
• subsoil

Soil formation begins with the weathering of 

• litter.
• bedrock.
• the A horizon.
• humus.

Soil that is rich in humus has high

• fertility (nitrogen, phosphorus...)
• water content.
• sand content.
• clay content.

A neutral ph is............................

• 7
• 1
• 14
• 6