Which of the following is correct about the U.S. soil classification system?
A) Soil variation is too complex for a single classification system, so many regional classification systems are used within the U.S.
B) The Soil Taxonomy is hierarchical, consisting of six categories from soil series to soil order.
C) The soil classification system was finalized in 1975 and no additional changes to it will be made.
D) It is primarily based on pedogenic regimes in which each soil-forming process is attached to a climatic region.

Question

Quizplus · Accepted Answer

The Soil Taxonomy, which is the U.S. soil classification system, is hierarchical and consists of six categories from soil series to soil order. Option A is incorrect because although regional classification systems may be used, the Soil Taxonomy is the national standard. Option C is incorrect because the Soil Taxonomy has been updated since 1975. Option D is partially correct, but it is not the only basis for the classification system. Other factors such as topography and geology are also considered.

Which of the Following Is Correct About the U