Arenic texture (WRB 2022)

Tests whether the upper 100 cm is uniformly coarser than sandy loam (i.e., silt + 2 * clay < 30 in every layer). Diagnostic of Arenosols.

Usage

arenic_texture(pedon, max_top_cm = 100, engine = NULL)

Arguments

pedon

A PedonRecord.

max_top_cm

Maximum top depth (cm) of layers to be tested (default 100, per WRB 2022).

engine

One of "soilkey" (default; strict WRB sand threshold via test_coarse_texture_throughout) or "aqp" (LUCAS-friendly fallback: passes when sand >= 70\ reads getOption("soilKey.diagnostic_engine").

Value

A DiagnosticResult.

Details

Sub-test: test_coarse_texture_throughout.

v0.3 limitations: WRB 2022 Arenosol also requires that no other diagnostic horizon (argic, ferralic, etc.) is present, but those exclusions happen at the key level via canonical RSG order.

References

IUSS Working Group WRB (2022), Chapter 5, Arenosols.