Location: Glenormiston College.
Australian Soil Classification: Melanic, Eutrophic, Black FERROSOL
Northcote Factual Key: Gn3.42
Great Soil Group: no suitable group
Geology: Quaternary volcanic scoriaceous deposits derived from Mt. Noorat.
General Landscape Description: Lower slope below Mt. Noorat.
Site Description: Roadside reserve.
Site SW20 Landscape |
A1 | 0-25 cm | Dark brown (7.5YR3/2); heavy clay loam; strong medium polyhedral, parting to strong fine polyhedral structure; pH 6.2; gradual change to: | Site SW20 Profile |
Subsoil | |||
B1 | 25-65 cm | Dark brown (7.5YR3/2); heavy clay loam; strong medium polyhedral, parting to fine polyhedral structure; contains scattered inclusions; pH 6.7: | |
B21 | 65-95 cm | Dark brown (7.5YR3/2); light medium clay; strong coarse polyhedral, parting to fine polyhedral structure; at 80-90 cm depth there is occasional dark reddish brown (5YR3/3) piping; pH 7.2: | |
Note: Scoria accumulations occur between 50 and 100 cm depth. Redder variation on the other side of the pit. |
pH | Salinity Rating | |||
Surface (A1 horizon) | slightly acid | low | non-sodic | none |
Subsoil (B1 horizon) | slightly acid | very low | non-sodic | none 1 |
Deeper subsoil (at 80 cm) | slightly alkaline | very low | non-sodic | none 1 |
The profile is slightly acid becoming slightly alkaline at 80 cm depth. | The salinity rating is low to very low throughout the profile. | Clay content increases only slightly down the profile. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||
meq/100g | ||||||||
A1 | 0-25 | 6.2 | 5.6 | 0.12 | 13 | 6.7 | 2.5 | 0.47 |
B1 | 25-65 | 6.7 | 5.9 | 0.06 | 11 | 7.3 | 1.9 | 0.4 |
B21 | 65-95 | 7.2 | 6.1 | 0.05 | 11 | 9.4 | 0.63 | 0.89 |
Horizon | Horizon Depth (cm) | 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 | 0-25 | 24 | 10 | 18 | 24 | 36 |
B1 | 25-65 | 18 | 11 | 21 | 22 | 37 |
B21 | 65-95 | 20 | 12 | 21 | 20 | 37 |