PVI4
Location: PVI Hamilton.
Australian Soil Classification: Endocalcareous, Epipedal, Grey VERTOSOL (non-gravelly surface).
Northcote Factual Key: Ug 5.24
Great Soil Group: Grey Clay
Geology: Alluvium overlying Tertiary/Quaternary basalt.
General Landscape Description: Lower lying areas below rise.
Soil Mapping Unit: Buckley Clay.
Site Description: Grazing paddock.
 Site PVI4 Landscape |
Surface Soil
| A1 | 0-15 cm | Dark grey (10YR4/1); light medium clay; moderate coarse blocky structure; very strong consistence (dry); pH 5.7; rusty root channel mottling; surface cracks: |  Site PVI4 Profile |
| Subsoil | |||
| B21 | 15-80 cm | Dark grey (10YR4/1); heavy clay; weak to moderate very coarse prismatic, parting to moderate coarse lenticular structure; very strong consistence (moist); pH 7.4: | |
| B22 | 80-110 cm | Greyish brown (2.5Y5/2) with olive yellow (2.5Y6/6) mottles; heavy clay; lenticular structure; very firm consistence (moist); very few (2%) soft fine carbonate nodules ; pH 8.8: | |
| B23 | 110+ cm | Greyish brown (2.5Y5/2); heavy clay; lenticular structure; very firm consistence (moist); pH 8.6. | |
Key Profile Features:
- Clay texture throughout the soil profile.
- Surface cracking is evident in drier seasons.
- Prominent vertic features in the subsoil i.e. lenticular peds.
pH | Salinity Rating | |||
Surface Soil (A1 horizon) | Moderately Acid | Low | Non-Sodic | None1 |
Upper Subsoil (15 - 80 cm) | Slightly Alkaline | Low | Sodic | Strong |
Deeper Subsoil (at 110+ cm) | Strongly Alkaline | Medium-High | Sodic | Strong |
 |  |  |  |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | NaCI % | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
A1 | 0-15 | 5.7 | 4.2 | 0.06 | 6.9 | 6.3 | 0.25 | 0.71 | |
B21 | 15-80 | 7.4 | 5.8 | 0.06 | 9.6 | 12 | 0.34 | 2.1 | |
B22 | 80-110 | 8.8 | 7.7 | 0.27 | 0.03 | 9.0 | 14 | 0.3 | 4.0 |
B23 | 110+ | 8.6 | 8.1 | 0.84 | 0.13 |  | | | |
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) |
A1 | 0-15 | 18 | 16 | 44 | 24 | 2 | 31 | 24 | 37 |
B21 | 15-80 | | | 42 | 21 | 1 | 30 | 20 | 46 |
B22 | 80-110 | | | 45 | 23 | 1 | 28 | 25 | 46 |
B23 | 110+ | | | | | | | | |
Profile Described By: Mark Imhof, Paul Rampant (16/1/2001).
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