5.02 (part 2)

What are the three layers of a typical soil profile starting at the soil surface?

• Bedrock, subsoil,and topsoil

• Subsoil, topsoil, and bedrock

• Topsoil, bedrock, and subsoil

• Topsoil, subsoil, and bedrock

The most desirable soil for noncontainer outdoor plant production is:

• clay

• loam

• sand

• silt

What is the percentage of solid soil particles in an ideal soil?

• 5

• 20

• 50

• 90

What is the texture of soils that have about equal parts of sand, clay, and silt?

• Clayey

• Loamy

• Sandy

• Silty

Most flowers, shrubs, and lawn grasses grow best in a pH ranging from:

• 1.0 to 2.5

• 3.0 to 5.0

• 5.5 to 7.0

• 7.5 to 9.0

Compared to other layers of a typical soil profile, the amount of organic matter in the O horizon is:

• about the same

• less

• more

• none

Wendy has problems getting flowers to grow in one of her flower beds. If she sends a soil sample to the laboratory to get recommendations to correct her problem, she should take cores or slices of soil from:

• all the flower beds.

• all the flower beds except the problem one.

• the entire lawn.

• the problem flower bed.

A soil test report with a pH of 7.2 is:

• extremely acid.

• extremely alkaline.

• mildly acid.

• mildly alkaline.

Which pH reading is acid?

• 3.5

• 7

• 8

• 9.5