LWA10
| Australian Soil Classification: Vertic & (Bleached-Ferric), Red CHROMOSOL |
Soil Profile Morphology:
Surface Soil
| Ap | 0-6 cm | Brown (7.5YR4/2); heavy sandy loam; moist consistence; pH 5.6; clear change to: |  LWA10 Profile |
A12 | 6-15 cm | Brown (7.5YR4/3); light sandy clay loam; pH 4.6; clear change to: | |
A21 | 15-25 cm | Brown (7.5YR4/4); firm to very firm consistence (dry); very many (50 - 90%) ferro-manganiferous concretions (2 – 8 mm); pH 4.7; gradual change to: | |
A22 | 25-45 cm | Brown (7.5YR5/4) with pink (7.5YR8/3) mottles; very many (80%) ferro-manganiferous concretions; pH 5.5; clear change to: | |
Subsoil |  | | |
| B2 | 45-65 cm | Yellowish red (5YR4/6) with light reddish brown (2.5YR6/4) and reddish brown (2.5YR4/6) mottles; medium clay; moderate coarse (50-100 mm) prismatic, parting to strong medium to fine (5-20 mm) polyhedral structure; firm to very firm consistence (dry); pH 5.9; clear change to: | |
2B2 | 65-80 cm | Brown (10YR5/3) with strong brown (7.5YR5/8) and white (10YR8/1) mottles; light clay (fine sandy); strong consistence (dry); many (40%) ferro-manganiferous nodules (2-5m); slight manganese staining; pH 6.6; clear change to: | |
3B2 | 80-105 cm | Light yellowish brown (2.5Y6/3) with strong brown (7.5YR5/8), greyish brown (2.5Y5/2) and yellowish red (5YR4/6) mottles; heavy clay; strong coarse (50-100 mm) prismatic, parting to strong coarse (20-50 mm), further parting to coarse (20-50 mm) lenticular structure; firm to strong consistence (dry); shiny ped faces; manganese staining common (20%); pH 8.1; gradual change to: | |
4B2 | 105-130+ cm | Light yellowish brown (2.5Y6/3) with yellowish red (5YR5/6) mottles; medium clay; moderate fine (10-20 mm) prismatic structure; firm to very firm consistence (moist); few (5%) manganese staining; few (2%) ferro-manganiferous nodules (5-10 mm); pH 8.6. |
Key Profile Features:
- Strong texture contrast between surface (A) horizons and subsoil (B2) horizon.
Soil Profile Characteristics:
| pH | Salinity Rating | Sodicity | Dispersion |
Surface (A1 horizon) | Moderately Acid | Low | | None1 |
Subsoil (B2 horizon) | Moderately Acid | Very Low | | None |
Deeper subsoil (at 105-130+ cm) | Strongly Alkaline | Very Low | | Strong |
| 1 Slight dispersion after remoulding | ||||
 |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | NaCl % | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
Ap | 0-6 | 5.6 | 5.4 | 0.29 | 3.0 | | | | |
A12 | 6-15 | 4.6 | 4.3 | 0.17 | 1.9 | 1.3 | 0.53 | 0.86 | 0.19 |
A21 | 15-25 | 4.7 | 4.3 | 0.13 | | 0.68 | 0.36 | 0.71 | 0.21 |
A22 | 25-45 | 5.5 | 5.1 | 0.12 | | 1.6 | 0.68 | 0.58 | 0.29 |
B2 | 45-65 | 5.9 | 5.2 | 0.19 | | 3.9 | 6.5 | 1.4 | 1.8 |
B3 | 65-80 | 6.6 | 5.6 | 0.10 | | 1.6 | 3.6 | 0.70 | 1.5 |
B4 | 80-105 | 8.1 | 6.8 | 0.23 | | 5.8 | 13 | 2.3 | 6.8 |
B5 | 105-130+ | 8.6 | 7.6 | 0.18 | | 4.9 | 11 | 1.6 | 5.5 |
Horizon | Horizon Depth (cm) | Ex Al mg/kg | Ex Ac meq/100g | Field 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) |
Ap | 0-6 | | | 24.3 | 7.2 | 22 | 42 | 16 | 16 |
A12 | 6-15 | | | 22.6 | 6.2 | 24 | 42 | 11 | 19 |
A21 | 15-25 | | | 19.7 | 6.2 | 31 | 39 | 12 | 16 |
A22 | 25-45 | | | 20.3 | 7.6 | 35 | 34 | 12 | 18 |
B2 | 45-65 | | | 51.9 | 28.2 | 3 | 11 | 7 | 79 |
B3 | 65-80 | | | 28.1 | 10.6 | 13 | 39 | 16 | 29 |
B4 | 80-105 | | | 55.8 | 31.5 | 3 | 7 | 4 | 84 |
B5 | 105-130+ | | | 38.5 | 20.6 | 12 | 26 | 7 | 51 |
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