SFS9a
See also SFS9b
Location: Woodhouse, Torino
General Landscape Description: Level plain with gilgai micro-relief.
Site Description: Depression or 'hollow' component of gilgai micro-relief
 SFS 9a |
Soil Profile Morphology:
| Surface Soil |  SFS 9a | ||
| A1 | 0-8/10 cm | Dark greyish brown (10YR4/2); loam; weak consistence; apedal; rusty root channels; pH 5.0; clear, wavy change to: | |
| A2 | 10-60 cm | Brown (10YR5/3 moist) with conspicuously bleached; clay loam, fine sandy; lower part of horizon (40-60 cm) has abundant (~90%) buckshot; pH 5.8; clear/abrupt change to: | |
| Subsoil | |||
| B21tc | 60-100 cm | Dark grey (10YR4/1 moist) with common (10-20%) brownish yellow (10YR6/8) and dark red (2.5R4/8) mottles; heavy clay; common (10-20%) buckshot; friable; fine polyhedral and lenticular peds; pH 7.0; gradual change to: | |
| B22 | 100 cm+ | Medium heavy clay; fine polyhedral and lenticular peds; with many yellow (30%) mottles with yellow mottles increase and red disappearing at depth. | |
Key Profile Features:
- Strong texture contrast between surface (A) horizon and subsoil (B21) horizon.
- Conspicuously bleached subsurface (A2) horizon.
Soil Profile Characteristics:
pH | Salinity Rating | |||
Surface (A1 horizon) | Strongly Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | Neutral | Low | Sodic | None |
 |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
A2 | 15-30 | 5.8 | 4.9 | 0.06 |  | 3.2 | 1.4 | 0.08 | 0.25 |
B21k | 65-85 | 7 | 7 | 0.13 | | 4 | 9.1 | 0.25 | 2.2 |
Horizon | Horizon Depth (cm) | Exchangeable Aluminium mg/kg | 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) |
A2 | 15-30 | <10 | 6.7 | 30.1 | 7.6 | 3.3 | 42.5 | 32 | 19 |
B21k | 65-85 | | | 40.7 | 26.7 | 8.7 | 11.7 | 7.5 | 67 |
Management Considerations:
Whole Profile
- Plant available water capacity (PAWC) is considered to be medium (estimated at 107 mm) in the upper 100 cm of this soil profile.
- Flat gently sloping side of broad depression. Pit excavated ~100 m west of NE gate into paddock. Duplex soil with buckshot gravel. SFS9a hollow and SFS9b is puff. Generally yellow clay in puff, ~30 cm to B, A2 full of buckshots. Greyer soil in hollow, ~ 60cm to B, buckshots only in lower 10 cm of A2 (generalization made on one pit). This site had more earthworms than we have seen at any other SFS site.
- Soil profile described by Richard MacEwan, May 1999.
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