|Location: Walpeup.||Australian Soil Classification: Epibasic, Argic, Calcic CALCAROSOL (very deep sandy profile).|
|Northcote Factual Key: Uc 3.31.||Geology: Quaternary aeolian deposits.|
|General Landscape Description: East-West dune.|
|A1||0-15 cm||Brown (7.5YR5/4); loamy sand; structureless (single grain); weak consistence dry; non calcareous; pH 7.8; abrupt and wavy change to:||
|A2||15-35 cm||Strong brown (7.5YR5/8) with sporadically bleached reddish yellow (7.5YR7/6d) layers; loamy sand; massive; weak consistence dry; contains very few (< 2%) fine-earth carbonates; pH 8.2; sharp and irregular change to:|
|B21||35-55 cm||Reddish yellow (7.5YR6/7); clayey sand; massive; firm consistence dry; very few (< 2%) fine-earth carbonates; pH 8.5; sharp and smooth change to:|
|B22||55-80 cm||Reddish yellow (7.5YR6/8) and yellowish red (5YR5/8) in bands; clayey sand; massive; firm consistence dry; fine-earth carbonates common (10 %); pH 8.9; sharp and irregular change to: |
|B23k||80-100 cm||Reddish yellow (7.5YR6/6) with occasional reddish yellow (7.5YR6/8) bands; sand; massive; fine-earth carbonates common (10 - 20%); pH 9.3; sharp and irregular change to:|
|B24||100+ cm||Layers of yellowish red (5YR5/8) clayey sand and reddish yellow (7.5YR6/8) sand; massive; weak consistence dry; few (2 - 10%) fine-earth carbonates; pH 9.1.|
The surface soil is slightly alkaline.
The upper subsoil is moderately alkaline,
becoming very strongly alkaline with depth.
The level of soluble salts is extremely low throughout the profile.
The profile is non-sodic throughout.
The clay content is low in this profile and increases in the subsoil.