% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/diagnostics-gelisols-usda.R
\name{fluvaquentic_usda}
\alias{fluvaquentic_usda}
\title{Fluvaquentic Subgroup helper (irregular OC decrease + aquic)}
\usage{
fluvaquentic_usda(pedon)
}
\arguments{
\item{pedon}{A \code{\link{PedonRecord}}.}
}
\value{
A \code{\link{DiagnosticResult}}.
}
\description{
Pass when:
\itemize{
  \item Irregular decrease in organic carbon between 25 cm and
        125 cm (or to a densic/lithic/paralithic contact); AND
  \item Aquic conditions in some horizon within 75 cm
        (\code{aquic_conditions_usda(pedon, max_top_cm = 75)}).
}
}
\details{
Implementation: tests whether OC values are non-monotonic (some
upward variation) within 25-125 cm.
}
\references{
Soil Survey Staff (2022), KST 13ed, Ch. 9.
}
