Location: Benambra (East of township)
Australian Soil Classification: Eutrophic, Subnatric, Black SODOSOL
Map Unit: Benambra (Component 1)
Previous Site Name: EG211
General Landscape Description: Almost level plain
Land Use: Lucerne
Native Vegetation: Montane grassland
Geology: Pleistocene to recent alluvial deposits
Photo taken from pit looking towards the north-east. The narrow present flood plain of
Morass Creek is in the middle ground
Surface soil | |||
A1 | 0 – 25 cm | Very dark greyish brown (10YR3/2); clay loam; strong medium (10 -20 mm) granular structure; weak consistence dry; pH 5.0; abrupt change to: | |
Subsoil | |||
B21 | 25 – 55 cm | Very dark greyish brown (10YR3/2); medium clay; coarse (20 – 50 mm) strong columnar structure; strong consistence dry; pH 6.5; diffuse change to: | |
B22 | 55 – 90 cm | Very dark greyish brown (10YR3/2) mottled with yellowish brown (10YR5/4); medium clay; coarse (20 – 50 mm) moderate prismatic structure; strong consistence dry; pH 7.8; diffuse change to: | |
B23 | 90 – 115 cm | Greyish brown (10YR5/2) and yellowish brown (10YR5/6) with distinct very dark greyish brown (10YR3/2) mottles; medium clay; moderate coarse (20 – 50 mm) prismatic structure; very firm consistence dry; pH 8.2. |
- | pH | Salinity | ||
Surface soil (A1 horizon) | Strongly Acid | Low | Non-sodic | None |
Subsoil (B21 horizon) | Slightly Alkaline | Very low | Sodic | None1 |
Deeper subsoil 90-115 cm | Moderately Alkaline | Low | Strongly Aodic | Slight1 |
Horizon | Horizon Depth (cm) | pH (water) | 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 | 0-25 | 5.0 | 0.17 | 4.0 | 0.32 | 17 | 11.0 | 7.0 | 3.7 | 0.52 | 0.24 | 9 | 33 | 24 | 23 | 35.9 | 12.9 |
B21 | 25-55 | 6.5 | 0.06 | 1.1 | 0.08 | 7.4 | 6.0 | 6.9 | 0.2 | 1.3 | 11 | 29 | 19 | 36 | 30.9 | 15.9 | |
B22 | 55-90 | 7.8 | 0.09 | 0.66 | 6.2 | 7.3 | 0.25 | 2.2 | 3 | 27 | 23 | 41 | 38.9 | 18.9 | |||
B23 | 90-115 | 8.2 | 0.16 | 0.39 | 6.1 | 6.4 | 0.16 | 3.3 | 12 | 36 | 17 | 34 | 33.4 | 16.2 |