Test for electrical conductivity above threshold (per layer)

Default 15 dS/m (salic horizon, WRB 2022 Ch 3.1.20). The WRB salic horizon also accepts an alkaline alternate: EC \>= 8 dS/m if pH(H2O) \>= 8.5. Pass alkaline_min_dS_m = 8 and alkaline_min_pH = 8.5 to enable that path – a layer is then \"qualifying\" if it satisfies the primary OR the alkaline gate. The path field in each details entry records which gate carried the layer.

Usage

test_ec_concentration(
  h,
  min_dS_m = 15,
  alkaline_min_dS_m = NA_real_,
  alkaline_min_pH = 8.5,
  candidate_layers = NULL
)

Arguments

h

Horizons table.

min_dS_m

Primary EC threshold (default 15).

alkaline_min_dS_m

Optional alkaline-path EC threshold (default NA: alkaline path disabled).

alkaline_min_pH

Required pH(H2O) for the alkaline path (default 8.5; only used when alkaline_min_dS_m is set).

candidate_layers

Optional layer index restriction.