Test for gleyic redoximorphic features within top 50 cm

Two evidence paths (any qualifies):

1. Mottle percent (primary): explicit redoximorphic_features_pct >= min_redox_pct (default 5\ is the v0.2 path.

2. Gleyic Munsell hue (v0.9.61, secondary): the horizon Munsell hue matches gleyic patterns (N / 5GY / 10G / 5BG / 10B etc.) AND chroma <= 2. Used when mottle percent is not reported. Common in BDsolos exports where surveyors fill matiz/valor/croma but leave mottle quantity empty.

Either path qualifies. If neither is determinable for any candidate layer (mottle pct AND hue both NA), returns NA. If both are determinable but neither passes, returns FALSE.

Usage

test_gleyic_features(
  h,
  max_top_cm = 50,
  min_redox_pct = 5,
  candidate_layers = NULL,
  max_chroma = 2
)

Arguments

h

Numeric threshold or option (see Details).

max_top_cm

Numeric threshold or option (see Details).

min_redox_pct

Numeric threshold or option (see Details).

candidate_layers

Numeric threshold or option (see Details).

max_chroma

Numeric threshold; gleyic-hue path requires munsell_chroma_moist <= max_chroma (default 2).