OTR413
Australian Soil Classification: Melacic, Pipey, Aeric PODOSOL
Northcote Factual Key: Uc2.34
General Landscape Description: Dissected Coastal Plain
Site Description: Flat Slope: 1%
Native Vegetation: Tall Wet Scrub; Woolly Tea-Tree
Geology: Quaternary Lacustrine/Alluvium
Soil Profile Morphology:
Surface Soil
| A11 | 0-7 cm | Black (10YR2/1); fine sandy loam; strong fine crumb structure; pH 5.7; clear boundary to: |  |
| A12 | 7-25 cm | Black (10YR2/1); fine sandy loam, silty; strong medium blocky structure; pH 6.6; clear and tongued boundary to: | |
| A2 | 25-45 cm | Grey (10YR5/1), with faint yellowish brown (10YR5/4) mottles; loam, fine sandy; apedal massive structure; pH 7.1; clear boundary to: | |
| Subsoil | |||
| B21 | 45-68 cm | Light brownish grey (10YR6/2), with yellowish brown (10YR5/4) and (10YR5/8) mottles; loam fine sandy, silty; apedal massive structure; pH 7.2; abrupt boundary to: | |
| B22 | 68 + cm | Grey (2.5Y5/1 and 2.5Y6/1), with yellowish brown (10YR5/8) mottles; fine sand, silty; apedal massive structure; pH 7.2. | |
| | | |
Soil Profile Characteristics:
| Salinity Rating | ||
Surface (A1 horizon) | Moderately Acid | Low | Non-Sodic |
Subsoil (B21 horizon) | Slightly Alkaline | Low | Non-Sodic |
Deeper Subsoil (at 120 cm) | Slightly Alkaline | Low | Non-Sodic |
|
| The surface is moderately acid. The subsoil is slightly alkaline. | | The salinity rating in this profile is low. | | This profile in non-sodic. | | The clay content is low in the surface and decreases with depth. |
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 | |||||||||||||||
A11 | 0-7 | 5.7 | 0.10 | 0.097 | 12.0 | 1.02 | 76 | 440 | 28.5 | 9.2 | 1.1 | 1.1 | 39.9 | 6.44 | 46.0 |
A12 | 7-12 | 5.9 | 0.07 | 0.071 | 5.8 | 0.61 | 46 | 220 | 22.7 | 6.9 | 0.6 | 0.8 | 31.1 | 4.24 | 35.3 |
A12 | 12-25 | 6.6 | 0.04 | 0.045 | 3.5 | 0.35 | 21 | 140 | 18.6 | 5.1 | 0.4 | 0.6 | 24.7 | 0.51 | 25.3 |
A2 | 25-45 | 7.1 | 0.03 | 0.034 | 0.9 | 0.091 | | 100 | | | | | | | |
B21 | 45-60 | 7.2 | 0.04 | 0.042 | 0.3 | 0.033 | 5 | 100 | 5.3 | 2.3 | 0.3 | 0.1 | 8.0 | | 7.4 |
B21 | 60-68 | 7.4 | 0.04 | 0.038 | 0.5 | 0.060 | | 160 | | | | | | | |
B22 | 68+ | 7.2 | 0.04 | 0.045 | 0.3 | 0.027 | 4 | 100 | 3.3 | 1.7 | 0.2 | 0.1 | 5.3 | 0.11 | 5.4 |
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) |
A11 | 0-7 | | 6 | 50 | 8 | 25 |
A12 | 7-12 | | 8 | 61 | 7 | 15 |
A12 | 12-25 | tr. | 2 | 72 | 6 | 13 |
A2 | 25-45 | tr. | | | | |
B21 | 45-60 | | 1 | 86 | 5 | 7 |
B21 | 60-68 | | | | | |
B22 | 68+ | | 1 | 92 | 4 | 3 |
Profile Described By: Frank Gibbons, 13th January 1965.
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