Folistic epipedon (USDA Soil Taxonomy, 13th edition) — folistic_epipedon

A freely-drained surface organic horizon. Differs from the histic epipedon in that it is saturated for less than 30 days per year. Diagnostic for the Folists suborder of Histosols and the Folistels great group of Histels.

Usage

folistic_epipedon_usda(pedon, min_oc_pct = 12, min_thickness_cm = 15)

Arguments

pedon: A PedonRecord.
min_oc_pct: Minimum OC for organic soil material (default 12).
min_thickness_cm: Minimum thickness (default 15 cm).

Value

A DiagnosticResult.

Details

KST 13ed required characteristics (Ch. 3, pp 13-14):

Saturated < 30 days/year (and not artificially drained); AND
Organic soil material: 15+ cm thick (with Sphagnum-rich exception 20-60 cm) OR Ap with OC >= 8 percent.

References

Soil Survey Staff (2022), KST 13ed, Ch. 3, pp 13-14.