Petroferric contact helper (USDA, KST 13ed Ch 3, p 48)
Source:R/diagnostics-oxisols-usda.R
petroferric_contact_usda.RdIronstone-like layer with >50% Fe oxides, indurated. v0.8 proxy:
cementation_class in {strongly, indurated} AND
plinthite_pct >= 50 (Fe-rich) AND coarse_fragments_pct >= 50.
Arguments
- pedon
A
PedonRecord.- max_top_cm
Default 125.