character or factor (when as.is=FALSE) containing soil moisture
regime labels extracted from 13th edition Keys to Soil Taxonomy taxa using
extractSMR()
Arguments
taxon
character. Vector of taxon names (order to subgroup level).
These values are converted to taxon "codes"
code
character. Vector of taxon codes.
as.is
logical. Return character labels rather than an (ordered)
factor? Default: FALSE