Example pedons for the soil forms of the South African classification

Small synthetic profiles written for the tests and examples, one per soil form of the South African soil classification of 1991 (named in lower case: "hutton", "clovelly" ...), each with one layer per diagnostic horizon or material of the form's sequence and the properties soilKey's tests read, and five special cases: "lichtenburg" (named by van Huyssteen 2020, outside the 1991 key: provisional), "lithosol" (an orthic A of 80 mm over unconsolidated material: no form, the land class rock and lithosols), "undecided" (an orthic A over a B whose hue is not recorded: Hutton or Clovelly undecided), "buried" (400 mm of aeolian sand over a Valsrivier: the buried soil keys) and "truncated" (a red apedal B at the surface over a dorbank: Garies, truncated). They are not real profiles.

Usage

make_za1991_example(form = "hutton", notation = FALSE, family = NULL)

Arguments

form

The form, in lower case, or a special case.

notation

Write the name of each horizon in diagnostic_za (the South African notation) besides the data (default FALSE).

family

Optional family code of the form ("Hu1200", or its four digits "1200"); NULL (default) for the first family.

Value

A PedonRecord.

Details

Since v0.9.359 each form example also holds the classes of one of its families: the first of the form by default (Hu1100 for Hutton), or the family named in family, made by changing the layer each family criterion reads (its colour, clay, cations, structure, carbonates, consistence) or adding the layer it reads (rock under the organic O, a podzolic layer under the yellow-brown apedal B of Constantia).

Examples

classify_za1991(make_za1991_example("clovelly"), on_missing = "silent")$name
#> [1] "Clovelly, Cv1100 Twyfelaar, sandy loam"
classify_za1991(make_za1991_example("hutton", family = "Hu2200"), on_missing = "silent")$name
#> [1] "Hutton, Hu2200 Suurbekom, sandy loam"