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Build the canonical Chernozem fixture

Source: R/utils-fixtures.R
make_chernozem_canonical.Rd

Synthetic Ukrainian / Russian steppe Chernozem on loess: thick dark Ah, granular structure, secondary carbonates accumulating in the Bk. By construction:

  • mollic: PASSES on horizon Ah1 (moist value 2, chroma 1, dry value 3; SOC 4%; BS 89%; thickness 30 cm; strong granular structure).

  • argic: FAILS (essentially no clay differentiation; ratios all close to 1).

  • ferralic: FAILS (CEC/clay ~ 120 cmol_c/kg clay – high-activity 2:1 clay).

Usage

make_chernozem_canonical()

Value

A PedonRecord.