GP81
| Location: Athlone | Aust. Soil Class.: Melacic, Dermosolic, Redoxic HYDROSOL |
| Site Description: Drainage line between rises. | Geology: Cretaceous sandstone. |
GP81 Landscape
Soil Profile Morphology:
Surface Soil
| O | 0-5 cm | Organic mat in pasture. |  GP81 Profile |
| A1 | 5-15 cm | Very dark greyish brown (10YR 3/2), light fine sandy clay loam; pH 5.0; clear change to: | |
| A21 | 15-30 cm | Greyish brown (10YR 5/2) with yellowish brown (10YR 5/6) mottles; light fine sandy clay loam; pH 5.0; gradual change to: | |
| A22 | 35-80 cm | Greyish brown (10YR 5/2) with yellowish brown (10YR 5/8) mottles; light fine sandy clay loam; pH 5.2; gradual change to: | |
| Subsoil | |||
| B21 | 80+ cm | Light brownish grey (10YR 6/2) with yellowish brown (10YR 5/8) mottles; fine sandy clay loam; medium coarse polyhedral parting to strong medium polyhedral structure; pH 5.3. | |
Key Profile Features:
- Soil profile is saturated for a number of months in most years.
 | pH | Salinity Rating | ||
Surface (A1 horizon) | Strongly Acid | High | Non-Sodic | None |
Subsoil (B21 horizon) | Strongly Acid | Low-Medium | Non-Sodic | None |
Horizon | Horizon Depth | pH (water) | pH CaCl2 | EC 1:5 | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
Meq/100g | |||||||||
A1 | 5-15 | 5.0 | 4.4 | 0.69 | | 2.5 | 1.8 | <0.1 | 0.6 |
A21 | 15-80 | 5.0 | 4.5 | 0.47 | | 1.1 | 1.2 | <0.1 | 0.4 |
A22 | 30-80 | 5.2 | 4.9 | 0.39 | | 1.0 | 1.2 | <0.1 | 0.3 |
B21 | 80+ | 5.3 | 4.6 | 0.34 | | 1.9 | 2.8 | 0.1 | 0.7 |
Horizon | Horizon Depth | Ex Al mg/kg | Ex Ac meq/100g | Field pF 2.5 | Wilting Point pF4.2 g/100g | Coarse Sand (0.2-2.0mm) % | Fine Sand (0.02-0.2mm) % | Silt (0.002-0.02mm) % | Clay (<0.002mm) % |
A1 | 5-15 | 47 | 14 | 32.2 | 21.9 | 2.6 | 45.4 | 37.0 | 10.5 |
A21 | 15-80 | 68 | 7.8 | 26.4 | 6.4 | 2.2 | 49.9 | 34.5 | 11.0 |
A22 | 30-80 | 77 | 7.5 | 27.9 | 5.9 | 1.4 | 49.7 | 34.5 | 11.5 |
B21 | 80+ | 21 | 7.3 | 28.0 | 15.5 | 1.0 | 32.4 | 40.5 | 25.0 |
Whole Profile
- The profile is likely to be saturated for a number of months in most years, which will restrict the growth of a number of species.
- The strongly acid profile indicates that manganese toxicity may occur – particularly in waterlogging conditions.
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