Victorian Resources Online (archived)
Site SW65
| Location: Simpson. | Australian Soil Classification: Reticulate, Mesotrophic, Brown CHROMOSOL. |
| General Landscape Description: Gently undulating plain (plateau). | Site Description: Flat plain above a gentle slope. Landuse is dairy pasture. |
| Geology: Hanson Plain Sand. |
Soil Profile Morphology:
Surface Soil
| Ap | 0-15 cm | Very dark greyish brown (10YR3/2 moist), dark greyish brown (10YR4/2 dry); loamy fine sand; apedal; very weak consistence; pH 5.3; diffuse change to: |  Site SW65 profile. |
| Subsoil | |||
| B1 | 15-40 cm | Dark yellowish brown (10YR4/6 moist), yellowish brown (10YR5/8 dry); clay loam; moderate root channels; firm consistence; pH 5.7; clear change to: | |
| B21 | 40-65 cm | Dark yellowish brown (10YR4/6 moist), yellowish brown (10YR5/8 dry); sandy clay loam; moderately pedal; diffuse change to: | |
| B22 | 65-100 cm | Dark yellowish brown (10YR4/6 moist and dry); medium to heavy clay; slight, strong brown (7.5YR4/6 moist) mottling; very friable; very firm consistence; pH 5.8; gradual change to: | |
| BC | 100 cm+ | Grey (N6/1 moist); and dusky red (7.5R3/4 moist), red (10R4/8 moist) and yellowish brown (10YR5/8 moist) reticulate mottling "Tiger Mottles"; medium to heavy clay. | |
Notes:
- A further profile was photographed 200 m east of SW65 . This had similar overall characteristics but also had very strongly cemented, ferruginised coarse sand at 1.5 m plus.
- A2 or B1 horizons are an irregular feature of this soil.
Key Profile Features:
- Strong texture contrast between upper horizons and subsoil (B21) horizon.
Key Profile Characteristics:
pH | Salinity Rating | |||
Surface (A1 horizon) | Strongly Acid | Very Low | Non-Sodic | None |
Subsoil (25-45 horizon) | Moderately Acid | Very Low | Non-Sodic | None |
Deeper subsoil (65-100 cm) | Moderately Acid | Very Low | Non-Sodic | None |
 |
Horizon | Horizon Depth (cm) | pH (water) | pH CaCl2 | EC 1:5 | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||
meq/100g | ||||||||
A1 | 0-10 | 5.3 | 4.7 | 0.12 | 2.8 | 0.3 | 0.19 | 0.1 |
B1 | 15-40 | 5.7 | 5.1 | 0.06 | 1.9 | 1.4 | 0.1 | 0.11 |
B22 | 65-100 | 5.8 | 5.3 | 0.07 | 1.6 | 6.4 | 0.15 | 0.55 |
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 | 0-10 | 39 | 11 | 19 | 7 | 24 | 47 | 14 | 9 |
B1 | 15-40 | <10 | 5.7 | 20 | 9 | 20 | 42 | 12 | 26 |
B22 | 65-100 | <10 | 9.1 | 34 | 23 | 10 | 20 | 5. | 63 |
Profile Described By: Mark Imhof and Richard MacEwan, April 1999.
