Build the canonical Lixisol fixture — make_lixisol

Synthetic Mediterranean / sub-tropical Lixisol on weathered calcareous parent material: argic horizon at Bt1 with low-activity clay (CEC/clay ~ 20) but high base saturation (BS ~ 70%) thanks to carbonate-buffered weathering. By construction:

argic: PASSES on Bt1.
lixisol: PASSES (CEC low, BS high).
acrisol, alisol, luvisol: FAIL.

Usage

make_lixisol_canonical()

Value

A PedonRecord.