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Appendix 8

Corrections to the ASC since publication (erratum)

Latest update: 4 December 2024. Pages refer to printed publication.

Please note that these changes have been included in the online version.

Anthroposols

Lower categories subheading, first sentence. Eight suborders, not seven.

Arenosols key

Text "that do not soften when moist" added to end of point 4 in two places - pages 13 and 19

Colour classes

Footnote to figure 3.   In some regions, especially southh-western Western Australia, common usage is for the colour yellow to be asigned for hues yellower than 5YR, value 5 and chroma 3 or greater. This is an acceptable variation in the ASC.

Vertosols, page 117

Replaced B2 horizon with solum in the Suborders section of key
i.e. The dominant colour class in the major part of the upper 0.5 m of the solum (or the major part of the entire solum if it is less than 0.5 m thick) is:

Glossary, page 127

Table for Clear or Abrupt textural horizon Right column, bottom box. 40 changed to 45.

Glossary, page 145

Under section "Sulfuric materials" Replace the two dots points (incorrectly copied in from second edition) with these three dot points:

  • mottles and coatings with accumulations of jarosite (hue of 2.5Y or yellower and chroma of about 6 or more) or other iron and aluminium sulfate or hydroxysulfate minerals such as natrojarosite, schwertmannite, sideronatrite, tamarugite, etc.
  • 0.05% or more by weight of water-soluble sulfate
  • underlying sulfidic material.

    • Glossary, page 146

    Under heading Transitional Horizons The text "master" has been deleted (two occurrences)

    Weighted average

    The term weighted average (referred to in pages 13 and 19) has been added to the glossary (p148) and defined as follows:

    The weighted average over a given depth is calculated by, for each layer or horizon, multiplying the value of the feature being averaged by the proportion that layer or horizon contributes to the given depth, and adding these values together.

    For example, if the given depth being classified is 100 cm, and this depth has three layers with coarse fragments as follows:

  • layer 1, depth 0-10 cm, 0% coarse fragments;
  • layer 2, depth 10-80 cm, 5% coarse fragments;
  • layer 3, depth 80-100 cm, 20% coarse fragments;

    • the weighted average for coarse fragments over the 100 cm is (0.1 x 0) + (0.7 x 5) + (0.2 x 20) = 7.5%.