Exam 15: Global Soils

Weathered parent material is the layer called:

The soil in which minerals are weathered to an extreme degree, with the color red, yellow, or yellow-brown, and that has a low base status is:

Leaching is a soil enrichment process.

Animals have little to no importance to soil forming processes.

The uppermost layer on a well-developed and undisturbed soil is the:

On the illustration, the soil at J is:

The layer of the soil that receives the clay particles, aluminum, and iron oxides and some organic matter is the:

A pH of 8 tend to be ____________ in terms of alkalinity.

Soil acidity can be reduced by treating with:

The most naturally fertile soil is considered to be the mollisols.

Angular or blocky describes a soil's:

The soils of the tropical rainforests are ultisols.

The layer of the soil that loses the clay particles and oxides of aluminum and iron is the:

The soil layers from the surface down on a well-developed and undisturbed soil are:

The soil associated with clay minerals as the parent material that is associated with mud cracks is:

Soil particles smaller than one hundred-thousandth of a millimeter are called colloids.

Dry climates often have soils with a __________ surface layer of mineral salts that have been transported upward by capillary action and evaporation of salt-rich ground water.

On the illustration, the soil at H is:

_____________ are grassland soils that occupy vast areas of semiarid and subhumid climates in midlatitudes.

The natural, terrestrial surface layer containing living matter and supporting, or capable of supporting, crops is BEST called: