PPW1
| Location: Rockbank | Australian Soil Classification: Vertic (& Calcic), Mesonatric, Red SODOSOL |
| General Landscape Description: Edge of plain, approximately 1,100 m east of Mt Kororoit summit. | Land Use: Grazing |
 PPW1-3 Landscape |
Soil Profile Morphology:
Surface Soil
| A1 | 0-12 cm | Yellowish red (5YR4/6); fine sandy clay loam; moderate coarse to medium blocky structure; weak consistence (wet); few dark flecks of manganese (2-5%); pH 5.7; abrupt change to: |  PPW1 Profile |
| Subsoil | |||
| B21 | 12-25 cm | Yellowish red (5YR5/8); light clay; moderate to strong coarse blocky structure; weak consistence (moist); pH 6.6; clear change to: | |
| B22 | 25-50 cm | Yellowish red (5YR5/6); medium heavy clay; strong coarse blocky, parting to moderate to strong medium polyhedral structure; very firm consistence (moist); very few spots of manganese (0-2%); slickensides present; pH 8.4; gradual change to: | |
| B23 | 50-80 cm | Yellowish red (5YR4/6); heavy clay; strong coarse blocky, parting to medium polyhedral structure; very firm consistence (slightly moist); very few dark spots manganese (0-2%); slickensides present; roots to 60 cm; roots move along slickensides; pH 9.4; gradual and wavy change to: | |
| B24k | 80-120 cm | Light brown (7.5YR6/4) with dark red (2.5YR4/6) mottles; conspicuously bleached; medium clay; moderate to strong medium polyhedral structure; firm consistence (moist); few soft to semi hard dark spots of manganese (1-2 mm); roots stop at carbonate layer; some lenticular structure in patches; pH 9.5; gradual and wavy change to: | |
| B25k | 120+ cm | Brown (7.5YR5/4) with dark red (2.5YR4/8) mottles; light medium clay; strong coarse blocky, parting to medium polyhedral structure; firm consistence (wet); few soft to semi hard dark spots of manganese (1-2 mm); pH 9.6: | |
Key Profile Features:
Soil Profile Characteristics:
 | pH | Salinity Rating | ||
Surface (A1 horizon) | Moderately Acid | | Sodic | |
Subsoil (B21 horizon) | Slightly Acid | | Strongly Acid | |
Deeper subsoil (at 120+ cm) | Very Strongly Alkaline | | Strongly Acid | |
 |
Horizon | Horizon Depth | pH (water) | pH CaCl2 | EC 1:5 | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
Meq/100g | |||||||||
A1 | 0-12 | 5.7 | 4.9 | 0.10 | | 5.5 | 3.0 | 2.4 | 0.79 |
B21 | 12-25 | 6.6 | 5.6 | 0.14 | | 4.3 | 6.7 | 1.4 | 3.1 |
B22 | 25-50 | 8.4 | 7.8 | 0.38 | 0.03 | 5.5 | 15 | 2.6 | 8.1 |
B23 | 50-80 | 9.4 | 8.7 | 0.87 | 0.09 | 4.9 | 19 | 2.7 | 12 |
B24k | 80-120 | 9.5 | 8.8 | 1.2 | 0.15 | 4.7 | 16 | 2.2 | 12 |
B25k | 120+ | 9.6 | 9.2 | 1.1 | 0.06 | 4.6 | 18 | 2.1 | 13 |
Horizon | Horizon Depth | Ex Al mg/kg | Ex Ac meq/100g | Field pF2.5 g/100g | 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 | 0-12 | <10 | | 14.8 | 25.0 | 6 | 32 | 19 | 34 |
B21 | 12-25 | | | 21.1 | 31.1 | 3 | 24 | 12 | 56 |
B22 | 25-50 | | | 27.9 | 47.2 | 2 | 17 | 16 | 65 |
B23 | 50-80 | | | 29.8 | 48.0 | 3 | 18 | 14 | 60 |
B24k | 80-120 | | | 25.4 | 42.9 | 3 | 12 | 11 | 52 |
B25k | 120+ | | | | | | | | |
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