CFTT12
| Site: Delburn | Location: APP species/seedlot trial VRV146 |
| Aust. Soil Class.: Acidic, Mesotrophic, Brown DERMOSOL | Great Soil Group: yellow earth |
| Tech. Class: 112-5-50/4-1-1-32 | Site Description: 8% simple slope to west |
| Geology: Mid-Tertiary sediments, probably includes colluvium from basalt | APP Mapping Unit: Silver Creek |
CFTT12 Landscape
Soil Profile Morphology:
Surface Soil
| A11 | 0 – 15 cm | Brown (7.5YR5/4) with slightly darker worm casts; clay loam; strong coarse granular structure; firm consistence moist; pH 5.1; clear and smooth transition to: |  CFTT12 Profile |
| A12 | 15 – 60 cm | Strong brown (7.5YR5/6); light clay; moderate coarse granular structure; firm consistence moist; pH 5.2; diffuse and smooth transition to: | |
| Subsoil | |||
| B21 | 60 – 100 cm | Yellowish brown (10YR5/4), few, medium, distinct, yellowish brown (10YR5/8) mottles; light clay; moderate coarse granular structure; firm consistence moist; diffuse and smooth transition to: | |
| B22 | 100 – 160 cm | Yellowish brown (10YR5/4), common, coarse, prominent, red (2.5YR4/6) mottles, light clay; moderate granular structure (less than 20 mm); firm consistence moist. | |
Key Profile Features:
- Lack of strong texture contrast between surface (A) horizons and subsoil (B21) horizons.
 | pH | Salinity Rating | ||
Surface (A1 horizon) | Strongly Acid | Very Low | Non-Sodic | None |
Subsoil (B21 horizon) | Strongly Acid | Very Low | Non-Sodic | None |
 The soil profile is strongly acid throughout. |  The level of soluble salts is very low throughout the soil profile. |  |  The clay content increases gradually with depth down the profile. |
Horizon | Horizon Depth | pH (water) | pH CaCl2 | EC 1:5 | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
Meq/100g | |||||||||
A11 | 0-15 | 5.1 | 4.4 | 0.08 | | 0.85 | 1.6 | 0.16 | 0.31 |
A12 | 15-60 | 5.2 | 4.5 | 0.06 | | 0.54 | 1.9 | 0.07 | 0.24 |
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) % |
A11 | 0-15 | 250 | 19 | 32.7 | 13.3 | 2.7 | 30.3 | 27 | 30.5 |
A12 | 15-60 | 150 | 11 | 31.1 | 13.6 | 1.2 | 30.2 | 27 | 38.5 |
Management Considerations:
- The soil profile is strongly acid throughout. Availability of some trace elements (eg. copper, molybdenum) may be low as a result. Aluminium toxicity can also be a problem in strongly acid soils. The levels measured at this site are quite high (especially in the A11 horizon) and may restrict the growth of aluminium sensitive species.
- The level of exchangeable cations is quite low throughout the profile (and dominated by magnesium). Some nutrient deficiencies may occur.
- No physical impeding layer evident to 2 metres depth.
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