Location: Athlone | Aust. Soil Class.: Bleached-Acidic, Eutrophic, Brown DERMOSOL |
Geology: Cretaceous sandstone. |
A1 | 0-8 cm | Very dark brown (10YR 3/2); very fine sandy clay loam; moderate to strong (3 mm) polyhedral structure; firm consistence (dry); pH 4.8; abrupt change to: | GP80 Profile |
A2 | 8-20 cm | Dark yellowish brown (10YR 4/4) conspicuously bleached (10YR 7/2 dry); fine sandy clay loam; weak (6 mm) blocky structure; very firm consistence (dry); pH 4.8; clear change to: | |
A22 | 20-40 cm | Dark yellowish brown (10YR 4/4); conspicuously bleached (10YR 7/2 dry) colour; very fine sandy clay loam; weak very coarse blocky structure; very firm consistence (dry); pH 5.0; clear change to: | |
Subsoil | |||
B1 | 45-60 cm | Yellowish brown (10YR 5/4) with yellowish brown (10YR 5/6) mottles (20%); clay loam; weak to moderate coarse blocky structure; firm consistence (dry); pH 5.1; clear change to: | |
B21 | 60-75 cm | Yellowish brown (10YR 5/4) with strong brown (10YR 5/8) mottles; sandy clay; medium coarse blocky parting to weak medium blocky structure; pH 5.2; clear change to: | |
C | 75 cm | Mottled rock. |
Key Profile Features:
pH | Salinity Rating | |||
Surface (A1 horizon) | Very Strongly Acid | Very Low | Non-Sodic | None |
Subsoil (B21 horizon) | Strongly Acid | Very Low | Non-Sodic | None |
Deeper Subsoil (at 60-75 cm) | Strongly Acid | Very Low | Non-Sodic | None |
Horizon | Horizon Depth | pH (water) | pH CaCl2 | EC 1:5 | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
Meq/100g | |||||||||
A1 | 0-8 | 4.8 | 4.2 | 0.13 | 6.0 | 3.0 | 0.49 | 0.26 | |
A21 | 8-20 | 4.8 | 4.1 | <0.05 | 3.2 | 2.5 | 0.25 | 0.14 | |
A22 | 20-40 | 5.0 | 4.1 | <0.05 | 1.7 | 2.7 | 0.25 | 0.17 | |
B1 | 40-60 | 5.1 | 4.2 | <0.05 | 1.8 | 4.5 | 0.26 | 0.29 | |
B21 | 60-75 | 5.2 | 4.6 | 0.06 | 3.5 | 7.9 | 0.37 | 0.61 |
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 | 0-8 | 170 | 23 | 42.7 | 13.2 | 2.8 | 29.2 | 32.5 | 22.5 |
A21 | 8-20 | 390 | 19 | 36.2 | 21.9 | 0.8 | 34.1 | 36.0 | 24.5 |
A22 | 20-40 | 490 | 16 | 33.1 | 11.9 | 0.7 | 35.0 | 36.5 | 24.0 |
B1 | 40-60 | 410 | 15 | 32.2 | 11.5 | 0.4 | 33.2 | 35.5 | 28.5 |
B21 | 60-75 | 510 | 20 | 38.9 | 13.6 | 0.3 | 27.3 | 30.5 | 38.5 |