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Lithic contact within X cm of the surface (USDA Subgroup helper)

Source: R/diagnostics-gelisols-usda.R
lithic_contact_usda.Rd

Pass when a horizon designation matches an R contact within max_top_cm. Default 50 cm (Subgroup-level depth bound). For Gelisols organic soil materials (Folistels), the depth is 50 cm; for Fibristels/Hemistels/Sapristels and other Gelisols, it is 100 cm (KST 13ed, p 46).

Usage

lithic_contact_usda(pedon, max_top_cm = 50)

Arguments

pedon

A PedonRecord.

max_top_cm

Default 50 cm.

Value

A DiagnosticResult.

References

Soil Survey Staff (2022), KST 13ed, Ch. 3, p 45; Ch. 9 various Subgroups.