% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/diagnostics-orders-usda.R
\name{oxisol_usda}
\alias{oxisol_usda}
\title{Oxisol (USDA Cap 13): oxic horizon, excluding profiles with an
argillic horizon overlying the oxic.}
\usage{
oxisol_usda(pedon)
}
\arguments{
\item{pedon}{A \code{\link{PedonRecord}}.}
}
\description{
v0.9.17 fix: KST 13ed Ch 13 (p 295) excludes from Oxisols any
profile whose argillic horizon's upper boundary lies within 100 cm
of the surface AND whose argillic base lies within 30 cm of the
upper boundary of the oxic. Operationally we use the simpler and
more defensible "argillic above oxic" check: if argillic exists
and starts strictly shallower than the oxic, the profile is NOT
an Oxisol (route to Ultisols / Alfisols instead). The previous
v0.8 implementation lacked this exclusion and was responsible for
misclassifying 144 Embrapa FEBR Ultisols as Oxisols in the
v0.9.16 benchmark.
}
