Location: Omeo West
Australian Soil Classification: Bleached, Eutrophic, Red Chromosol
Map Unit: Minor map unit A
Previous Site Name: EG59
General Landscape Description: Alluvial terrace
Site description: Alluvial terrace, Simple slope, gradient unspecified
Land Use: Grazing on annual pasture
Native Vegetation: Montane grassy woodland
Geology: Pleistocene (Neogene) alluvium and colluvium.
Alluvial terrace near where soil samples were taken. The Livingston Fault formed the steep hills in the background.
No soil pit photo available, but the deep profile exposed in the first photo serves as an indication.
Surface soil | ||
A1 | 0 – 10 cm | Dark brown (10YR4/3); fine sandy loam; weak polyhedral structure; pH 5.3; clear change to: |
A2 | 10 - 20 cm | Pinkish grey (7.5YR6/3); conspicuously bleached (7.5YR7/2d); fine sandy loam; apedal; very firm consistence, dry; pH 5.4; clear change to: |
Subsoil | ||
B21 | 20 – 40 cm | Reddish brown (5YR4/4); medium clay; strong angular blocky structure; strong consistence dry; common (10 – 20%) medium (6 – 20 mm) rounded pebbles; pH 5.5; clear change to: |
B22 | 40 – 60+ cm | Reddish brown (5YR4/4); medium clay; weak angular blocky structure; strong consistence dry; common abundant medium (6 – 20 mm) and large (20 – 60 mm) pebbles. |
- | pH | Salinity | ||
Surface soil (A1 horizon) | Strongly Acid | Very Low | Non-sodic | None# |
Subsoil (B1 horizon) | Strongly Acid | Very Low | Non-sodic | None# |
Deeper subsoil (70 -110 cm) | Strongly Acid | Very Low | Non-sodic | None* |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | Organic Carbon % | Total Nitrogen % | Exchangeable Aluminium ppm | Exchangeable Acididty meq/100g | Exchangeable Cations | Coarse Sand (0.2-2.0 mm) % | Fine Sand (0.02-0.2 mm) % | Silt (0.002-0.02 mm) % | Clay (<0.002 mm) % | Field Capacity % w/w | Wilting point % w/w | |||
Ca | Mg | K | Na | |||||||||||||||
meq/100g | ||||||||||||||||||
A1 | 0-10 | 5.3 | 4.6 | 0.09 | 2.1 | 0.14 | 4.6 | 8.3 | 2.4 | 2.0 | 0.73 | 0.1 | 24 | 38 | 14 | 22 | 21.6 | 8.0 |
A2 | 10-20 | 5.4 | 4.7 | 0.05 | 13 | 4.5 | 1.4 | 0.91 | 0.35 | 0.06 | 23 | 46 | 18 | 13 | 18.3 | 4.4 | ||
B21 | 20-40 | 5.5 | 4.8 | 0.11 | 35 | 12.0 | 6.2 | 6.5 | 0.95 | 0.36 | 9 | 14 | 6 | 66 | 35.1 | 21.0 |