OTR428
Australian Soil Classification: Acidic-Mottled, Dystrophic, Brown DERMOSOL
Northcote Factual Key: Gn3.21
General Landscape Description: Hills
Site Description: Mid Slope
Geology: Kl: Cretaceous fluvial sediments; felspathic sandstone, siltstone, mudstone (Eumeralla Formation)
Soil Profile Morphology:
Surface Soil
| 02 | -1 - 0 cm | Very dark brown (10YR2/2); loam; strong very fine crumb structure; pH 4.6; abrupt smooth change to: |  |
| A1 | 0-15 cm | Very dark greyish brown (10YR3/2); clay loam; moderate subangular blocky structure; a few sandstone gravel; pH 4.4; abrupt change to: | |
| A3 | 15-30 cm | Dark greyish brown (10YR4/2); clay loam; moderate fine subangular blocky structure; a few sandstone gravel; pH 4.5; gradual change to: | |
| Subsoil | |||
| B2 | 30-90 cm | Dark yellowish brown (10YR4/4), with a few pale brown (10YR6/3) mottles; medium clay; moderate medium subangular blocky structure; common fine to coarse sandstone gravel; pH 4.7; diffuse change to: | |
| C | 90+ cm | Dark yellowish brown (10YR4/8), with common greyish brown (10YR5/2) mottles; sandy loam; weak subangular blocky structure; many fine to very coarse sandstone gravel; pH 4.8. | |
| | | |
Soil Profile Characteristics:
| Salinity Rating | ||
Surface (A1 horizon) | Very Strongly Acid | Low | Non-Sodic |
Subsoil (B2 horizon) | Very Strongly Acid | Low | Non-Sodic |
Deeper Subsoil (at 120 cm) | Very Strongly Acid | Low | Non-Sodic |
|
| This profile is very strongly acid. | | This profile has a low salinity rating. | | This profile is non-sodic | | The clay content is moderate. |
Horizon | Horizon Depth (cm) | pH (water) | EC dS/m | Cl % | Organic Carbon % | Total N % | P ppm | K ppm | Exchangeable Cations | Total Bases cmolc/kg | Ex Ac cmolc/kg | CEC cmolc/kg | |||
Ca | Mg | K | Na | ||||||||||||
cmolc/kg | |||||||||||||||
O2 | -1-0 | 4.6 | 0.30 | 0.025 | 1.7 | 0.82 | 33 | 540 | 11.5 | 6.0 | 1.3 | 0.4 | 19.2 | 11.6 | 30.8 |
A1 | 0 - 8 | 4.4 | 0.16 | 0.011 | 9.9 | 0.55 | 13 | 280 | 3.1 | 2.7 | 0.7 | 0.2 | 6.7 | 14.3 | 21.0 |
A1 | 8 - 15 | 4.5 | 0.09 | 0.008 | 6.1 | 0.32 | 10 | 220 | 0.9 | 1.3 | 0.5 | 0.1 | 2.8 | 13.5 | 16.3 |
A3 | 15 - 30 | 4.5 | 0.09 | 0.006 | 3.2 | 0.17 | 5 | 120 | 0.4 | 0.5 | 0.3 | 0.06 | 1.26 | 11.74 | 13.0 |
B2 | 30 - 60 | 4.7 | 0.05 | 0.004 | 1.1 | 0.075 | | | 0.3 | 0.5 | 0.3 | 0.09 | 0.89 | 11.91 | 12.8 |
C | 120 - 150 | 4.8 | 0.09 | 0.010 | 0.3 | 0.023 | | | 0.3 | 0.5 | 0.1 | 0.3 | 1.2 | 10.9 | 12.1 |
Horizon | Horizon Depth (cm) | Gravel % | Coarse Sand (0.2-2.0 mm) | Fine Sand (0.02-0.2 mm) | Silt (0.002-0.02 mm) | Clay (<0.002 mm) |
O2 | -1-0 | 8 | 4 | 10 | 18 | 24 |
A1 | 0 - 8 | <1 | 6 | 34 | 24 | 26 |
A1 | 8 - 15 | 0 | 7 | 36 | 27 | 24 |
A3 | 15 - 30 | <1 | 7 | 38 | 24 | 27 |
B2 | 30 - 60 | <1 | 7 | 38 | 21 | 34 |
C | 120 - 150 | 0 | 7 | 64 | 16 | 13 |
Profile Described By: Frank Gibbons.
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