Location: Fernbank | Australian Soil Classification: Vertic (& Magnesic), Mottled-Subnatric, Brown SODOSOL (medium to thick sandy surface horizons) |
Great Soil Group: solodised solonetz | General Landscape Description: Undulating plain with low rises. |
Site Description: Grazing paddock. | Geology: Quaternary (Pleistocene) sediments. |
Mapping Unit: Fernbank |
Site GP83 Landscape |
A1 | 0-15 cm | Dark brown (10YR3/3); loamy sand; pH 4.9; clear change to: | Site GP83 Profile |
A2 | 15-30 cm | Light yellowish brown (10YR6/4) conspicuously bleached (10YR8/1 dry) mottles; sand; pH 5.1; sharp change to: | |
Subsoil | |||
B21 | 30-60 cm | Yellowish brown (10YR5/6) with brownish yellow (10YR6/8) and greyish brown (10YR5/2) mottles; medium heavy clay; strong very coarse columnar, parting to weak-moderate very coarse blocky and weak coarse polyhedral structure; strong consistence (dry); pH 6.3; gradual change to: | |
B22 | 60-100 cm | Brownish yellow (10YR6/6, 6/8); light medium clay (sandy); strong very coarse prismatic structure; isolated rounded quartz gravel (5 cm); isolated slickensides; pH 7.0; gradual change to: | |
B23 | 100-120+ cm | Yellowish brown (10YR5/6); medium clay (sandy); moderate coarse prismatic, parting to moderate coarse blocky structure; dark staining evident; contains few (10%) quartz grit; pH 7.3. |
Horizon | pH | Salinity Rating | ||
Surface (A1 horizon) | Very Strongly Acid | Very Low | Non-Sodic | None |
Subsoil (B21 horizon) | Slightly Acid | Low | Sodic | Strong |
Deeper subsoil (at 100-120+ cm) | Slightly Alkaline | Medium | Strongly Sodic | Slight - Moderate |
|
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | Exchangeable Aluminium mg/kg | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
A1 | 0-15 | 4.9 | 4.3 | 0.08 | 26 | 1.5 | 0.41 | 0.07 | 0.28 |
A2 | 15-30 | 5.1 | 4.5 | <0.05 | 13 | 0.35 | 0.10 | <0.05 | 0.21 |
B21 | 30-60 | 6.3 | 5.2 | 0.11 | 12 | 2.1 | 6.1 | 0.14 | 1.7 |
B22 | 60-100 | 7.0 | 6.1 | 0.16 | 0.98 | 7.3 | 0.13 | 2.6 | |
B23 | 100-120+ | 7.3 | 6.7 | 0.58 | 0.7 | 7.3 | 0.1 | 3.7 |
Horizon | Horizon Depth (cm) | Exchangeable Acidity meq/100g | 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) | Bulk Density Kg/L |
A1 | 0-15 | 7.7 | 11 | 4 | 50 | 32 | 9 | 4 | |
A2 | 15-30 | 1.1 | 7 | 1 | 50 | 37 | 8 | 2 | 1.5 |
B21 | 30-60 | 7.4 | 29 | 18 | 23 | 18 | 8 | 50 | 1.6 |
B22 | 60-100 | 28 | 24 | 21 | 9 | 48 | |||
B23 | 100-120+ | 17 | 15 | 9 | 30 | 18 | 42 |