HUME212
Location: Benambra
Australian Soil Classification: Mottled-Sodic, Calcic, Black CHROMOSOL
Map Unit: Benambra (Component 4)
Previous Site Name: HUME212
General Landscape Description: Low lunette
Site Description: Road reserve
Geology: Quaternary alluvial/aeolian deposits
Soil Profile Morphology:
| Surface soil |  | | |
| A11 | 0-7 cm | Black (10YR2/1); fine sandy clay loam; moderate medium to coarse angular blocky structure; pH 5.5; clear smooth boundary to: | |
| A12 | 7-15 cm | Black (10YR2/1); fine sandy light clay; moderate medium to coarse angular blocky structure; pH 6.2; clear smooth boundary to: | |
Subsoil | | | |
| B21 | 15-30cm | Mottled black and dark yellowish brown; heavy clay; strong fine angular blocky structure; occasional coarse carbonate concretions; pH 8.6; clear smooth boundary to: | |
| B22 | 30-60 cm | Mottled black and dark yellowish brown; heavy clay; strong 1-5 cm blocky peds arranged in columns; occasional coarse carbonate concretions; pH 8.6; clear smooth boundary to: | |
| B23 | 60-100 cm + | Mottled olive and black; heavy clay; strong fine to medium subangular blocky peds weakly arranged in columns; calcium carbonate concretions up to coarse in size are common – decreasing below 100 cm; pH 8.4. | |
Soil Profile Characteristics:
- | pH | Salinity | |
Surface soil (A1 horizon) | Moderately Acid | Very Low | Non-sodic |
Subsoil (B21 horizon) | Strongly Alkaline | Medium | Non-sodic |
Deeper subsoil 90-115cm | Moderately Alkaline | High | Sodic |
Chemical and Physical Analysis:
Horizon | Horizon Depth (cm) | pH (water) | EC dS/m | Organic Carbon % | Total Nitrogen % | 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) % | |||
Ca | Mg | K | Na | ||||||||||
meq/100g | |||||||||||||
A1 | 0-7 | 5.5 | 0.09 | 3.5 | 0.32 | 8.8 | 5.0 | 2.1 | 0.3 | 11 | 36 | 17 | 27 |
B21 | 15-30 | 6.2 | 0.06 | 1.3 | 0.12 | 8.3 | 10.5 | 2.5 | 0.8 | 6 | 22 | 6 | 58 |
B22 | 30-60 | 8.6 | 0.80 | 0.2 | 0.04 | 10.2 | 20.2 | 2.2 | 1.3 | | | | |
B23 | 60-110 | 8.4 | 1.20 | | | 9.1 | 21.7 | 1.9 | 3.8 | 1 | 11 | 9 | 74 |
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