A database of formative elements used by the first 4 levels of US Soil Taxonomy hierarchy (soil order, suborder, greatgroup, subgroup).

data(ST_formative_elements)

Format

An object of class list of length 4.

References

S. W. Buol and R. C. Graham and P. A. McDaniel and R. J. Southard. Soil Genesis and Classification, 5th edition. Iowa State Press, 2003.