Location: Portarlington, Bellarine Peninsula
Australian Soil Classification: Endocalcareous-Endohypersodic, Self-Mulching, Black VERTOSOL
General Landscape Description: Mid slope within low hills.
Geology: Palaeogene Older Volcanics: extrusive tholeiitic and minor alkaline basalts.
CLRA6 Landscape. Low hills near Portarlington
Soil Profile Morphology:
Surface Soil
A11 | 0–10 cm | Very dark grey (10YR3/1); sapric light clay; few (6–20 mm) subrounded quartz gravels; moderate coarse and medium and strong fine subangular blocky structure; rough ped fabric; very firm consistence (dry); pH 7.0; smooth abrupt boundary to: | CLRA6 Profile | |||
A12 | 10–30 cm | Black (2.5/N); sapric medium clay; few (20–60 mm) angular basalt gravels; moderate medium polyhedral parting to strong fine polyhedral structure; rough ped fabric; strong consistence (dry); pH 7.0; smooth clear boundary to: | ||||
Subsoil | ||||||
B21 | 30–60 cm | Black (2.5/N); medium clay; very few (20–60 mm) angular basalt gravels; strong coarse prismatic parting to strong coarse and medium polyhedral structure; smooth ped fabric; few prominent slickenside cutans; strong consistence (dry); pH 7.5; wavy diffuse boundary to: | ||||
B22 | 60–80 cm | Black (10YR2.5/1); heavy clay; very few (20–60 mm) angular basalt gravels; strong coarse prismatic structure parting to strong coarse and medium polyhedral structure; smooth ped fabric; few prominent slickenside cutans; strong consistence (dry); pH 8.0; wavy diffuse boundary to: | ||||
BC | 80–100 cm | Dark greyish brown (2.5Y4/2) with few moderate distinct black mottles; light medium clay; few (6–20 mm) angular basalt gravels; strong medium polyhedral structure; smooth ped fabric; very few distinct slickenside cutans; strong consistence (dry); common large calcareous soft segregations; pH 8.5; wavy clear boundary to: | ||||
C | 100–150 cm | Dark greyish brown (2.5Y4/2); coarse sandy clay; common (20–60 mm) angular basalt gravels; apedal massive structure; earthy fabric; very few distinct slickenside cutans; strong consistence (dry); common very large calcareous soft segregations; pH 9.0. | ||||
Horizon | Sample Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||
meq/100g | ||||||||
A11 | 0–10 | 7.1 | 6.6 | 0.33 | 16 | 11 | 5.8 | 0.6 |
A12 | 10–30 | 7.3 | 6.6 | 0.2 | 23 | 14 | 4.4 | 1.2 |
B21 | 30–60 | 7.9 | 7.1 | 0.22 | 25 | 24 | 4 | 2.9 |
B22 | 60–80 | 8.5 | 7.6 | 0.25 | 23 | 29 | 2.6 | 4.6 |
BC | 80–100 | 9 | 8.3 | 0.52 | 22 | 43 | 1.3 | 12 |
C | 100–150 | 9.1 | 8.4 | 0.53 | 18 | 42 | 2.4 | 33 |
Horizon | Sample Depth (cm) | Sodium Chloride % | Exchangeable Acidity cmolc/kg | 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) |
A11 | 0–10 | <0.01 | 40.1 | 29.1 | 17.1 | 26 | 15 | 28 | |
A12 | 10–30 | 8.7 | 47.0 | 28.2 | 7.4 | 26.5 | 16.5 | 38.5 | |
B21 | 30–60 | 63.3 | 38.2 | 3 | 22.4 | 16.5 | 51.5 | ||
B22 | 60–80 | 67.5 | 38.3 | 2.5 | 20.6 | 16.5 | 51 | ||
BC | 80–100 | 0.01 | 6.7 | 33.1 | 9.5 | 36 | |||
C | 100–150 |