Build the canonical Gleysol fixture — make_gleysol

Synthetic Gleysol from a high-water-table floodplain: A with low chroma but no explicit redox features (so gleyic test is anchored on Bg); Bg with diagnostic redoximorphic features (35% by volume) within the upper 50 cm. By construction:

gleyic_properties: PASSES on Bg.
argic, ferralic, mollic, cambic, plinthic, spodic, calcic, gypsic, salic: FAIL.

Usage

make_gleysol_canonical()

Value

A PedonRecord.