General Land Unit Description:
This site is situated on the level surface of the Dundas Tablelands. Red gums are the dominant vegetation. The dominant soil type is a Brown Chromosol, commonly with a ferric horizon which, in some cases, may be cemented (petroferric). The soil is developed over a highly weathered mottled zone. The mottled zone, sometimes referred to as ‘tiger mottling’, is thought to be the result of fluctuating watertables which occurred mainly in the Tertiary period.
![]() Site GL164 Landscape |
Site Description:
Slope: 0-1%
Geology: Tertiary marine sandstone.
Landform Pattern: Level plain.
Position in Landscape: Flat.
Internal Drainage: Moderately well drained.
Soil Profile Morphology:
Surface Soil
A1 | 0-25 cm | Very dark grey (7.5YR3/1) sandy loam; weak medium blocky structure; weak consistence (dry); very few medium angular ferruginised nodules (6-20 mm); pH 6.5; clear and wavy change to: | ![]() Site GL164 Profile |
A2 | 25-40 cm | Dark yellowish brown (10YR4/4) fine sandy clay loam; weak to massive medium blocky structure, firm consistence (moist); many medium to coarse ferruginous and manganiferous nodules; pH 4.7; clear and wavy change to: | |
Subsoil | |||
B2 | 40-60 cm | Dark yellowish brown (10YR4/6) light medium clay (sandy); weak fine blocky structure; firm consistence (moist); many coarse ferruginous and manganiferous nodules; pH 5.5; clear and wavy change to: | |
BC | 60-85 cm | Mainly buckshot; ferruginous and manganiferous nodules are abundant; moderately cemented discontinuous; ferricrete pan; abrupt and wavy change to: | |
C | 85-150 cm | ![]() |
pH | Salinity Rating | |||
Surface (A1 horizon) | Slightly Acid | Low | Non-Sodic | None |
Subsoil (40-60 cm) | Strongly Acid | Low | Non-Sodic | None |
![]() | ![]() | ![]() | ![]() |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | Exchangeable Aluminium mg/kg | Exchangeable Acidity meq/100g | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||||
meq/100g | ||||||||||
A1 | 0-25 | 6.5 | 6.0 | 0.11 | ![]() | 7.8 | 8.1 | 2.2 | 0.42 | 0.38 |
A2 | 25-40 | 4.7 | 4.0 | 0.08 | 220 | 11 | 0.54 | 1.7 | 0.12 | 0.4 |
B21 | 40-60 | 5.5 | 4.6 | 0.08 | 53 | 9.8 | 1.4 | 4.0 | 0.16 | 0.68 |
Horizon | Horizon Depth (cm) | 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) |
A1 | 0-25 | 20 | 9 | 14 | 54 | 9 | 17 |
A2 | 25-40 | 20 | 9 | 13 | 47 | 8 | 30 |
B21 | 40-60 | 27 | 15 | 10 | 35 | 8 | 47 |
Profile Described By: Natalie Baxter, Nathan Robinson, Grant Boyle and Mark Imhof (October 2001).