Pretic horizon (WRB 2022): "Amazonian Dark Earth" (terra preta de indio) horizon – thick anthropogenic surface with high P, SOC, and incorporated charcoal / pottery.

Pretic horizon (WRB 2022): "Amazonian Dark Earth" (terra preta de indio) horizon – thick anthropogenic surface with high P, SOC, and incorporated charcoal / pottery.

Usage

pretic(pedon, min_thickness = 20, min_oc = 1.5, min_p_mehlich3 = 30)

Arguments

pedon

A PedonRecord.

min_thickness

Numeric threshold or option (see Details).

min_oc

Numeric threshold or option (see Details).

min_p_mehlich3

Numeric threshold or option (see Details).