Histosols Order qualifier (USDA, KST 13ed, Ch 2, p 7)

Organic soils not meeting the Gelisols requirements (no permafrost within 100 cm). The KST defines Histosols as soils with organic soil materials that meet specific thickness/depth criteria (Ch 2, pp 7-9; see also Ch 3 organic soil materials).

Usage

histosol_qualifying_usda(pedon)

Arguments

pedon

A PedonRecord.

Value

A DiagnosticResult.

Details

Implementation: pass when cumulative organic-layer thickness (designation H or O) within 0-100 cm >= 40 cm AND no permafrost within 100 cm.

References

Soil Survey Staff (2022), KST 13ed, Ch. 2, pp 7-9.