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Sideralic properties (WRB 2022 Ch 3.2.13)

Source: R/diagnostics-properties-wrb-v033.R
sideralic_properties.Rd

Mineral material with a relatively low CEC. WRB 2022 (3.2.13) requires BOTH:

  1. one or both of: clay >= 8% AND CEC/clay < 24 cmol_c/kg clay; OR bulk CEC < 2 cmol_c/kg soil;

  2. evidence of soil formation as defined in criterion 3 of the cambic horizon (test_cambic_soil_formation).

Both must be met by the SAME layer. Criterion 2 was added in v0.9.127 (previously only criterion 1 was enforced); where the soil-formation evidence cannot be assessed (no Munsell/clay/Fe/carbonate adjacency data) the result is NA rather than a false positive.

Usage

sideralic_properties(pedon, max_cec_per_clay = 24, max_bulk_cec = 2)

Arguments

pedon

A PedonRecord.

max_cec_per_clay

Numeric threshold or option (see Details).

max_bulk_cec

Numeric threshold or option (see Details).

Value

A DiagnosticResult recording whether the diagnostic is present, the qualifying layers, and the supporting evidence.