Victorian Resources Online (archived)
PVI 3
| Site: PVI 3 | Land Unit: Monivae Basalt |
| Aust. Soil Class.: Ferric, Eutrophic, Brown CHROMOSOL (thick, clay loamy surface) (confidence level 1) | |
 | General Land Unit Description: The level to gently undulating basalt plains between Branxholm and Glenthompson consist of an association of Vertic or Ferric Brown Chromosols and Ferric Brown Sodosols. The Chromosols typically occur on the upper slopes and crests of very slight rises that may have scattered surface boulders, and Sodosols on the lower slopes and depressions. Sodosols or Vertosols, occasionally with a sporadic bleached subsurface horizon, are usually found in open depressions or drainage lines. |
Site Description:
| Geology: Quaternary basalt | Landform pattern: Level to gently undulating plain |
| Position in landscape: Midslope of low rise | Internal drainage: Moderately well drained |
| A1 | 0-15 cm | Dark brown (10YR3/3), very fine sandy clay loam, weak coarse blocky structure, weak consistence (dry), pH 5.6. Clear change to: |  |
| A21 | 15-30 cm | Dark brown (10YR3/3), sporadically bleached, very fine sandy clay loam, firm consistence (dry), many (40%) ferruginous nodules, pH 6.3. Clear change to: | |
| A22 | 30-40 cm | Clay loam (very fine sandy), massive, very firm consistence (dry), very many (60%) ferruginous nodules, pH 6.6. Clear change to: | |
| Subsoil | |||
| B21 | 40-65 cm | Yellowish brown (10YR5/6) with many (40%) brownish yellow (10YR6/8) and yellowish red (5YR5/8) mottles, light medium clay, weak medium prismatic, parting to strong coarse to medium blocky structure, strong consistence (dry), very many (60%) ferruginous nodules (2-10 mm), few (5%) ferruginous basalt fragments (5-8 mm), some manganese staining, pH 6.8. Gradual change to: | |
| B22 | 65-120 cm | Yellowish brown (10YR5/4) with many (40%) strong brown (7.5YR5/8) and yellowish red (5YR5/8) mottles, light medium clay, weak medium prismatic, parting to strong coarse to medium to fine blocky structure, few (5%) ferruginous basalt fragments, strong consistence (dry), pH 6.5. Gradual change to: | |
| B23 | 120+ cm | Yellowish brown (10YR5/4) with light grey (10YR7/1), reddish yellow (7.5YR6/8) and dark red (2.5YR4/8) mottles, medium heavy clay, firm consistence (moist), pH 6.5. |
Key Profile Features
- Strong texture contrast between surface (A) horizons and subsoil (B21) horizon
- Large amount of ferruginous nodules in subsurface (A2) horizon
pH | Salinity Rating | Sodicity | Dispersion | |
Surface soil (A1 horizon) | Moderately Acid | Low | Non-Sodic | None |
Upper subsoil (40-65 cm) | Slightly Acid | Low | Non-Sodic | None |
Deeper subsoil (at 120 cm) | Slightly Acid | Low | Non-Sodic | None |
Horizon | Horizon Depth | pH (water) | pH CaCl2 | EC dS/m | NaCl % | Exchangeable Cations | Ex Al mg/kg | Ex Ac meq/100g | Field pF2.5 | Wilting Point pF4.2 | Coarse Sand (0.02-0.2mm) | Fine Sand (0.02-0.2mm) | Silt (0.02-0.02mm) | Clay (<0.002mm) | |||
Ca | Mg | K | Na | ||||||||||||||
meq/100g | |||||||||||||||||
A1 | 0-15 | 5.6 | 4.3 | 0.07 | 4.8 | 2.4 | 0.14 | 0.27 | 12 | 35.1 | 13.1 | 4.3 | 39.6 | 25.5 | 25.0 | ||
A2 | 15-30 | 6.3 | 5.0 | 0.06 | 3.8 | 2.6 | 0.11 | 0.37 | <10 | 27.8 | 10.5 | 14.2 | 37.0 | 19.5 | 15.5 | ||
A22 | 30-40 | 6.6 | 5.4 | 0.07 | 4.9 | 3.9 | 0.13 | 0.52 | 27.4 | 13.0 | 20.2 | 28.2 | 14.5 | 33.5 | |||
B21 | 40-65 | 6.8 | 5.7 | 0.12 | 5.5 | 6.5 | 0.22 | 1.0 | 9.3 | 41.9 | 24.5 | 7.6 | 16.3 | 10.0 | 65.5 | ||
B22 | 65-120 | 6.5 | 5.8 | 0.14 | 5.2 | 7.2 | 0.20 | 1.3 | 9.9 | 46.6 | 27.0 | 7.4 | 15.6 | 9.0 | 66.5 | ||
B23 | 120+ | 6.5 | 6.2 | 0.17 | 3.9 | 6.9 | 0.14 | 1.5 | |||||||||
