Sombric horizon (WRB 2022): subsurface accumulation of humus that qualified neither as spodic nor as a true mollic-like horizon (low-base-saturation cool tropical highlands). v0.3.3 detects via designation pattern + OC criteria (BS < 50, OC > 0.6, depth > 25 cm).

Usage

sombric(
  pedon,
  min_thickness = 15,
  min_oc = 0.6,
  max_bs = 50,
  min_top_cm = 25,
  min_oc_increase = 0.1
)

Arguments

pedon: A PedonRecord.
min_thickness: Numeric threshold or option (see Details).
min_oc: Numeric threshold or option (see Details).
max_bs: Numeric threshold or option (see Details).
min_top_cm: Numeric threshold or option (see Details).
min_oc_increase: Numeric threshold or option (see Details).