Victorian Resources Online (archived)
MM548
| Site: MM548 | Land Unit: Glenthompson Granites |
| Aust. Soil Class.: Ferric, Mottled-Subnatric, Brown SODOSOL (confidence level 2) | |
| General Land Unit Description: This land unit comprises a small area of Cambrian granites south of Glenthompson. The soils tend to have a strong texture contrast with a sodic subsoil. There are many ferromangaiferous nodules above the clay, which is common to many soils in the study area. The mottled subsoil and the bleached A2 horizon indicate that the soil is imperfectly drained. This feature, together with the ferric horizon, would be the major restriction for land use. |
Site Description:
| Geology: Cambrian granite | Landform pattern: Gently undulating plain |
| Position in landscape: Low crest | Internal drainage: Imperfectly drained |
| A1 | 0-25 cm | Very dark greyish brown (10YR3/2) sandy loam, very weak consistence, a few fine segregations, pH 5.3. Clear transition to: |
| A2 | 25-40 cm | Brown (10YR5/3) sandy loam, conspicuously bleached light grey (10YR7/2), many ferromanganiferous nodules. Sharp transition to: |
| Subsoil | ||
| B21 | 40-55 cm | Yellowish brown (10YR5/4) medium heavy clay, red (2.5YR4/6) mottles, strong blocky structure (5-10 mm), pH 7. Transition to: |
| B22 | 55+ cm | Yellowish brown (10YR5/4), medium heavy clay, red (2.5YR4/6) mottles, strong blocky structure (5-10 mm), pH 7. |
Key profile features:
- Strongly acidic topsoil
- Bleached A2 horizon
- Strong texture contrast between topsoil and subsoil
- Many ferromanganiferious nodules in A2 horizon
- Topsoil dispersive when worked when wet
- Top of the subsoil dispersive when worked when wet
- Deeper subsoil strongly sodic
