Soil Formation

Which soil layer contains the most organic material?

• A horizon

• B horizon

• C horizon

• Bedrock

Which soil layer contains the most clay?

• A horizon

• B horizon

• C horizon

• Bedrock

Which layer contains broken-up bedrock on top of the solid bedrock?

• A horizon

• B horizon

• C horizon

• Bedrock

Which layer do you find the most minerals?

• A horizon

• B horizon

• C horizon

• Bedrock

Approximately how many years does one centimeter of topsoil take to form?

• 10 – 40 years

• 100 – 400 years

• 1000 – 4000 years

• 10,000 – 40,000 years

Which of the following is found in the greatest % in soil?

• Mineral matter

• Organic matter

• Water

• Air

How is soil created from rock?

• physical weathering without chemical weathering

• erosion without weathering

• chemical weathering without physical weathering

• weathering without erosion

Which layer of a soil profile forms first from the bedrock?

• A horizon

• B horizon

• C horizon

• Bedrock

Crops that are planted in rows parallel to the land shape on a hillside.

• No-Till Method

• Terraces

• Strip Cropping

• Windbreaks

• Contour Farming

A crop that leaves bare ground between row is alternated with a crop that completely covers the ground.

• No-Till Method

• Terraces

• Strip Cropping

• Windbreaks

• Contour Farming