SFS16
Location: PVI Hamilton
Australian Soil Classification: Haplic, Self-mulching, Black VERTOSOL
Northcote Factual Key: Ug 5.16
Great Soil Group: Possibly Wiesenboden.
Geology: Alluvium overlying Tertiary/ Quaternary basalt Newer Volcanics.
General Landscape Description: Drained swamp.
Soil Mapping Unit: Buckley Clay.
Site Description: Level plain (part of a former swamp).
 Site SFS16 Landscape |
Soil Profile Morphology:
Surface Soil
| Ap | 0-20 cm | Very dark grey (10YR3/1); heavy clay; strongly pedal; self mulching surface, polyhedral (2-20 mm) structure; clear change to: |  Site SFS16 Profile |
| Subsoil | |||
| B21t | 20-60/70 cm | Very dark grey (10YR3/1); heavy clay; strong coarse prismatic structure; slickensides at ped bases; clear change to: | |
| B22ss | 60/70-100/110 cm | Grey (5Y5/1) with common (20%) fine to medium yellowish brown (10YR5/6) mottles; heavy clay; prominent slickensides becoming larger (>30 cm) at depth; gradual change to: | |
| B23ss | 110+ cm | Pale olive (5Y6/4) with common fine yellowish brown (10YR5/6) mottles; heavy clay; prominent slickensides. | |
 | |  Subsoil Ped | |
Key Profile Features:
- Clay texture throughout soil profile
- Significant cracking when profile is dry.
- Prominent slickensides in subsoil.
pH | Salinity Rating | |||
Surface (A1 horizon) | Strongly Acid | Low | Non Sodic | None |
Subsoil (B21 horizon) | Moderately Acid | Low | Non Sodic | None 1 |
Deeper Subsoil (at 130+ cm) | Slightly Alkaline | Low | Sodic | None 1 |
 |  |  |  |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | NaCI % | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
Ap | 0-10 | 6.0 | 5.3 | 0.23 | | 16 | 18 | 0.68 | 1.5 |
B21 | 10-50 | 6.6 | 5.6 | 0.16 | | 15 | 21 | 0.84 | 2.2 |
B22 | 50-90 | 7.5 | 6.8 | 0.41 | 0.07 | 15 | 26 | 0.7 | 4.4 |
B23 | 90-130 | 7.6 | 7.1 | 0.81 | 0.14 | 13 | 25 | 0.9 | 4.8 |
Horizon | Horizon Depth (cm) | Exchangeable Aluminium mg/kg | Exchangeable Acidity meq/100g | Field Capacity pF2.5 | Wilting Point pF4.2 | Coarse Sand (0.2- 2.0 mm) | Fine Sand (0.02- 0.2 mm) | Silt (0.002- 0.02 mm) | Clay (<0.002 mm) |
Ap | 0-10 | 11 | 21 | 56 | 36 | 2 | 10 | 14 | 63 |
B21 | 10-50 | | 16 | 59 | 33 | 1 | 9 | 18 | 67 |
B22 | 50-90 | | | 58 | 40 | 1 | 8 | 12 | 75 |
B23 | 90-130 | | | 1 | 7 | 10 | 74 |
Management Considerations:
Whole Profile
- Plant available water capacity (PAWC) is considered to be high (estimated at 167 mm) in the upper 100 cm of this soil profile.
Profile Described By: Richard MacEwan, 7 December 1999.
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