fragmentClasses: Coarse Fragment Class Labels and Diameter

In aqp: Algorithms for Quantitative Pedology

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
)

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.

Value

named vector of fragment diameter in mm

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')

aqp documentation built on Sept. 8, 2023, 5:45 p.m.