LS18
Location: Woorak.
Australian Soil Classification: Calcic, Mottled-Subnatric, Red SODOSOL
General Landscape Description: Hills
Site Description: Crest of a hill slope.
Native Vegetation: Yellow gum.
 LS18 Landscape |
Soil Profile Morphology (south facing pit face):
Surface Soil
| A11 | 0-10 cm | Very dark greyish brown (10YR3/2); soft surface condition; loam; moderate coarse blocky structure; weak consistence dry; pH 5.9; changes to: |  LS18s Profile - south facing |
| A12 | 10-20 cm | Dark brown (10YR3/3); fine sandy clay loam; moderate medium blocky structure; firm consistence dry; pH 7.4; clear change to: | |
| Subsoil |  | | |
| B21 | 20-40 cm | Dark reddish brown (5YR3/3); medium heavy clay; strong fine-medium blocky structure; strong consistence dry; contains a few soft carbonate segregations; slightly calcareous; pH 8.8; changes to: | |
| B22 | 40-60 cm | Reddish brown (5YR4/3), with yellowish red (5YR5/6) mottles; medium clay; moderate medium blocky structure; strong consistence dry; contains a few soft carbonate segregations; slightly calcareous; pH 8.8; changes to: | |
| B23k | 60-110 cm | Pink (7.5YR7/4) with reddish yellow (5YR6/6) mottles; medium heavy clay; strong medium prismatic, parting to strong medium blocky structure; strong consistence dry; common pockets of soft carbonate segregations present; highly calcareous; pH 9.1; changes to: | |
| B24 | 110+ cm | Pink (7.5YR7/4) with yellowish red (5YR5/8) mottles; medium heavy clay (sandy); weaker structure than above; firm consistence moist; moderately calcareous; pH 9.4. | |
| | | |
 | NOTE: Some areas of the upper subsoil can be black (10YR3/2) with moderate to fine prismatic structure. |
| LS18w Profile - west facing | |
Soil Profile Characteristics:
| pH | Salinity | ||
Surface (A1 horizon) | Moderately Acid | Medium | Non-Sodic | None |
Subsoil (B21 horizon) | Strongly Alkaline | Low-Medium | Sodic | None1 |
Deeper Subsoil (60-110 cm) | Very Strongly Alkaline | High | Strongly Sodic | None1 |
| The surface is moderately acid. The upper subsoil is strongly alkaline becoming very strongly alkaline with depth. | | The salinity rating of the surface is medium. The upper subsoil is low to medium becoming high with depth. | | The surface is non-sodic. The upper subsoil is sodic and the deeper subsoil is strongly sodic. |
Chemical and Physical Analysis:
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | Na Cl % | Exchangeable Cations | Total Nitrogen % | Organic Carbon % | Field Capacity pF 2.5 | Wilting Point pF 4.2 | |||
Ca | Mg | K | Na | ||||||||||
meq/100g | |||||||||||||
A11 | 0-10 | 5.9 | 5.5 | 0.26 | <0.05 | 34.5 | 5..8 | 2.3 | 0.2 | 0.99 | 12.2 | 36.7 | 31.0 |
A12 | 10-20 | 7.4 | 6.8 | 0.2 | - | 13.4 | 4.9 | 2.5 | 0.9 | | | 16.9 | 42.0 |
B21 | 20-40 | 8.8 | 7.9 | 0.47 | - | 25.9 | 9.0 | 2.5 | 5.8 | | | 12.2 | 35.1 |
B22 | 40-60 | 8.8 | 8.1 | 0.96 | 0.17 | 17.6 | 12.1 | 1.5 | 9.1 | 0.14 | 1.8 | | |
B23 | 60-110 | 9.1 | 8.4 | 1.18 | 0.23 | 11.2 | 11.4 | 1.4 | 8.9 | 0.09 | 1.1 | | |
B24 | 110 | 9.4 | 8.6 | 0.96 | 0.15 | 7.7 | 11.1 | 1.2 | 9.6 | | | | |
Profile Described By: Mark Imhof, David Rees, Sonia Thompson (May 1994).
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