Victorian Resources Online (archived)
PVI 8
| Site: PVI 8 | Land Unit: Monivae Basalt |
| Aust. Soil Class.: Melanic (& Ferric-Sodic), Eutrophic, Brown CHROMOSOL (thick, moderately gravelly, 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: Upper slope of rise | Internal drainage: Moderately well drained |
| A1 | 0-20 cm | Very dark greyish brown (10YR3/2), fine sandy clay loam, moderate coarse blocky, parting to moderate medium blocky structure, firm consistence (dry), many (25%) ferruginous nodules (2 - 5 mm), pH 5.5. Clear change to: |  |
| A2 | 20-35 cm | Brown (10YR4/3), light clay, firm consistence (dry), many (40%) ferruginous nodules (2-5 mm), common (20%) weathered basalt fragments (8-30 mm), pH 6.0. Clear change to: | |
| Subsoil | |||
| B21 | 35-50 cm | Yellowish brown (10YR5/4 and 10YR5/8), with strong brown (7.5YR5/6) mottles, medium clay, moderate to strong medium to fine polyhedral structure, strong consistence (dry), few (2-5%) iron nodules (2-5 mm), pH 6.6. Gradual change to: | |
| B22 | 50-80 cm | Brownish yellow (10YR6/6) with dark red (2.5YR3/6) mottles, light clay, moderate to strong medium to fine polyhedral structure, strong consistence (dry), very few (1%) ferruginous and nodules (2 mm) and manganese stains, pH 6.7. Gradual change to: | |
| B23 | 80-120 cm | Yellowish brown (10YR5/4) with strong brown (7.5YR5/6) light yellowish brown (10YR6/4) and dark red (2.5YR4/6) mottles, light clay, moderate to strong medium blocky structure, very firm consistence (dry), manganese stains, some weathered basalt, pH 6.7. Gradual change to: | |
| BC | 120+ cm | Light grey (10YR7/1) with brownish yellow (10YR6/8) and dark red (2.5YR4/8) mottles, light clay, strong consistence (moist), with weathered ferruginous basalt, pH 6.7. |
Key Profile Features
- Strong texture contrast between surface (A) horizons and subsoil (B21) horizon
- Large amount of ferruginous nodules in surface (A) horizons
pH | Salinity Rating | Sodicity | Dispersion | |
Surface soil (A1 horizon) | Strongly Acid | Low | Non-Sodic | None |
Upper subsoil (35-50 cm) | Slightly Acid | Low | Non-Sodic | None |
Deeper subsoil (at 80-120 cm) | Slightly Acid | Low | 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 | 0-20 | 5.5 | 4.8 | 0.10 | 6.4 | 2.2 | 0.33 | 0.36 | 13 | 11 | 36.0 | 15.7 | 13.0 | 29.7 | 17.5 | 30.5 | |
A2 | 20-35 | 6.0 | 5.2 | 0.07 | 5.3 | 3.1 | 0.20 | 0.37 | <10 | 12 | 26.4 | 15.5 | 30.0 | 18.8 | 13.0 | 34.5 | |
B21 | 35-50 | 6.6 | 6.0 | 0.07 | 4.5 | 6.4 | 0.15 | 0.53 | 11 | 37.6 | 27.0 | 7.0 | 12.4 | 10.5 | 68.5 | ||
B22 | 50-80 | 6.7 | 6.2 | 0.08 | 3.8 | 6.7 | 0.12 | 0.90 | 42.0 | 27.3 | 9.9 | 11.8 | 10.5 | 65.5 | |||
B23 | 80-120 | 6.7 | 6.2 | 0.09 | 3.3 | 7.0 | 0.11 | 1.4 | 43.7 | 31.5 | 4.5 | 9.6 | 11.0 | 73.5 | |||
BC | 120+ | 6.7 | 6.3 | 0.14 | 2.1 | 6.3 | 0.07 | 1.8 | |||||||||
