Exam 12: Soils

Parent material is closely associated with which soil-forming factor?

Write a paragraph explaining the important properties of oxisols.

The true soil layer is known as ________.

The processes that deepen and age soils include all but the following:

Earthworms ________.

An Alfisol is most closely related to ________.

The smallest-sized pieces of a soil are ________.

Ultisols generally lack ________.

Three-quarters of the soil's metabolic activity is generated by ________.

The process of eluviation in soils is the same thing as leaching.

A dark color is a sure indication that the soil is fertile.

Soils are considered part of the ________.

Shale regolith produces coarse-textured soil and limits soil development.

This soil order is developed from volcanic ash.

The measure of acidity/alkalinity in soils is based on the relative concentration of active hydrogen ions.

Seeds germinate mainly in the ________ horizon.

A soil with a large percentage of clay would be ________ and ________.

Acid soils deprive plants of nutrients by the process of leaching.

Laterization represents the most rapid cycling of nutrients of all soil-forming processes.

The B horizon is usually called ________.