Victorian Resources Online (archived)
MM240
| Site: MM240 | Land Unit: Terang Sedimentary |
| Aust. Soil Class.: Ferric, Mottled-Subnatric, Brown SODOSOL (confidence level 2) | |
 | General Land Unit Description: The unit consists of gently undulating plains on Tertiary sediments, predominantly in the Mortlake– Terang area. The dominant soil type is a Brown Chromosol, either with a mottled subsoil (MM474) or a bleached A2 horizon and a ferric horizon (MM472). There are minor occurrences of Ferric Brown Sodosols which is represented by this site. |
Site Description:
| Geology: Tertiary sedimentary | Landform pattern: Level to gently undulating plains |
| Position in landscape: Flat | Internal drainage: Imperfectly drained |
| A1 | 0-15 cm | Dark brown (10YR3/3) fine sandy clay loam, hard-setting surface, apedal, weak consistence when dry, pH 5.0. Clear transition to: |
| A2 | 15-30 cm | Greyish brown (10YR5/2), sporadically bleached (10YR7/2) when dry, ferromanganiferous nodules are abundant, weak consistence when dry, pH 5.9. Sharp transition to: |
| Subsoil | ||
| B21 | 30-110 cm | Yellowish brown (10YR5/6) medium clay, red mottles, strong blocky structure (10-20 mm), firm consistence when moist, pH 6.3. Gradual transition to: |
| B22 | 110+ cm | Yellowish brown (10YR5/6), red mottles, strong blocky structure, coarse fragments (200-600 mm), very firm consistence when moist, pH(water) 7.3. |
Key profile features:
- Strongly acidic topsoil
- Strong texture contrast between topsoil and subsoil
- Sodic subsoil
- Many ferromanganiferous nodules
