% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/diagnostics-horizons-wrb-v033.R
\name{protovertic}
\alias{protovertic}
\title{Protovertic horizon (WRB 2022 Ch 3.1)}
\usage{
protovertic(pedon, min_clay = 30, min_thickness = 15)
}
\arguments{
\item{pedon}{A \code{\link{PedonRecord}}.}

\item{min_clay}{Numeric threshold or option (see Details).}

\item{min_thickness}{Numeric threshold or option (see Details).}
}
\value{
A \code{\link{DiagnosticResult}} recording whether the diagnostic is present, the qualifying layers, and the supporting evidence.
}
\description{
A weakly developed vertic horizon -- the swelling/shrinking
machinery is present but does not reach the full vertic intensity
(cracks too narrow, or slickensides only "few", or thickness too
small). Used by the Protovertic qualifier; relevant for soils that
would be Vertisols if the cracks/slickensides were a notch
stronger.
}
\details{
v0.3.5 detection: clay \\>= 30\% AND any positive vertic evidence
(slickensides at \\>= "few" OR cracks_width_cm \\>= 0.2 OR a
wedge/lenticular structure_type) AND thickness \\>= 15 cm. The
positive cases that pass the strict \code{\link{vertic_horizon}}
test are explicitly excluded so the two diagnostics partition the
vertic-spectrum cleanly.
}
