aqp (version 2.1.0)

fragmentClasses: Coarse Fragment Class Labels and Diameter

Description

This is a convenience function for accessing coarse fragment class labels and associated diameter (mm), as defined in various classification systems such as USDA, Unified, and AASHTO.

Usage

fragmentClasses(
  sys = c("usda_simplified", "usda", "international", "unified", "aashto",
    "mod.wentworth"),
  flat = FALSE,
  rounded = FALSE
)

Value

named vector of fragment diameter in mm

Arguments

sys

character, length 1. This is an abbreviated name used to select class labels and fragment diameter.

flat

logical. Fragments are flat, only used by USDA systems.

rounded

logical. Fragments are rounded, only used by AASHTO system.

References

Schoeneberger, P.J., D.A. Wysocki, E.C. Benham, and Soil Survey Staff. 2012. Field book for describing and sampling soils, Version 3.0. Natural Resources Conservation Service, National Soil Survey Center, Lincoln, NE.

See Also

fragmentSieve()

Examples

# use default system: "usda_simplified"
fragmentClasses()
fragmentClasses(flat = TRUE)

fragmentClasses(sys = 'usda')
fragmentClasses(sys = 'USDA', flat = TRUE)

fragmentClasses(sys = 'international')

fragmentClasses(sys = 'unified')

fragmentClasses(sys = 'aashto')
fragmentClasses(sys = 'aashto', rounded = TRUE)

fragmentClasses(sys = 'mod.wentworth')