Build the canonical Alisol fixture

Synthetic humid-tropical Alisol on weathered shale: argic horizon at Bt1 with high-activity clay (CEC/clay ~ 34) AND high Al saturation (Al sat ~ 70%); the canonical "young weathering on a 2:1 clay parent that has not yet released enough Al into the precipitate-stabilised pool". By construction:

• argic: PASSES on Bt1.

• alisol: PASSES (CEC high, Al sat high).

• acrisol, lixisol, luvisol: FAIL.

Usage

make_alisol_canonical()

Value

A PedonRecord.