Unit 23 Review Questions

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. The Soil Taxonomy of 1975:

is based primarily on climate characteristics correct incorrect

defines 17 soil orders correct incorrect

uses several soil characteristics to determine soil order correct incorrect

is universally accepted as the best way to characterize soils correct incorrect

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. Which soil order is most common in grasslands at temperate latitudes, such as the Great Plains in the United States?

Mollisols correct incorrect

Alfisols correct incorrect

Ultisols correct incorrect

Inceptisols correct incorrect

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. This soil order lacks a B horizon and is found in many different climates:

Ultisols correct incorrect

Entisols correct incorrect

Inceptisols correct incorrect

Alfisols correct incorrect

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. This soil order was established to include soils developed from volcanic ash:

Vertisols correct incorrect

Oxisols correct incorrect

Spodosols correct incorrect

Andisols correct incorrect

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. This soil order has a B horizon with high concentrations of iron and aluminum and little or no clay:

Entisols correct incorrect

Spodosols correct incorrect

Gelisols correct incorrect

Mollisols correct incorrect