Exam 12: Soils

Much soil material is actually wasted bits of rocks and composed of ________.

A soil series is ________.

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

Most soil development takes place ________.

The B horizon is usually called ________.

The A or A/O horizon combination is sometimes called the ________.

The pedogenic regime associated with the tropical moist climates is ________.

Distinctly alkaline diagnostic horizons, thin profiles, lack of organic material, and dominance of sandy materials are features most closely associated with which soil order?

Draw a "normal" soil profile associated with calcification. Label its major features.

An immature order of soils with faint characteristics, not yet prominent enough to produce diagnostic horizons is a/an ________.

Mollisols and ________ are the two most agriculturally productive soil orders.

The measure of a soil's capacity to hold water and air is called ________.

A soil containing only an A horizon atop partially altered parent material is said to be ________.

________ is the soil order covering the greatest surface area on Earth.

The term "clay" is a reference to

The soils which are red with a surface layer containing much aluminum and iron are ________.

Water deficits occur in the soil-water budget before the plants reach the wilting point.

________ is a soil-forming process which leaves behind an ash light-colored A horizon.

It is possible to deduce the past climate and biota of a location from the study of the soil.

The unconsolidated parent materials beneath the level of roots is called the ________ horizon of soil.