SW36
Location: Irrewillipe
Australian Soil Classification: Melacic-Mottled, Eutrophic, Black DERMOSOL
Map Unit: Map Unit 125 (Maher and Martin, 1987).
General Landscape Description: Level plain.
Site Description: Grazing paddock (dairy).
Geology: Tertiary - Moorabool Viaduct Formation.
 SW36 Landscape |
Soil Profile Morphology:
Surface Soil
| A11 | 0-20 cm | Very dark grey (10YR3/1); clay loam (veryfine sandy); rusty root channel mottling; moderate fine blocky structure; weak consistence dry; pH 5.0: |  SW36 Profile |
| A12 | 20-30 cm | Very dark greyish brown (10YR3/2); clay loam; rusty root channel mottling; moderate medium blocky, parting to fine blocky structure; very firm consistence dry; contains very few (1%) ferruginous nodules (2-5 mm in size); pH 5.3; gradual change to: | |
| Subsoil |  | | |
| B1 | 30-50 cm | Dark greyish brown (10YR3/2) with a few faint yellowish brown (10YR5/8) mottles; rusty root channel mottling; light clay; moderate coarse polyhedral, parting to moderate medium polyhedral structure; firm consistence moist; contains very few (1%) ferruginous nodules (2-5 mm in size); pH 5.6: | |
| B21 | 50-60 cm | Very dark grey (10YR3/2) with a few faint yellowish brown (10YR5/6) mottles; light medium clay; strong coarse prismatic, parting to moderate coarse blocky and strong fine blocky structure; strong consistence dry; pH 5.3: | |
| B22 | 60-100 cm | Very dark grey (10YR3/1); medium clay; strong coarse prismatic, parting to strong medium prismatic and strong coarse blocky structure; strong consistence dry; pH 5.3. |
Soil Profile Characteristics:
| pH | Salinity Rating | ||
Surface (A11 horizon) | Strongly Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | Strongly Acid | Low | Non-Sodic | None |
Deeper subsoil (at 1 m) | Strongly Acid | Low-Moderate | Non-Sodic | None |
 The whole profile is strongly acid throughout. |  The salinity rating is low for the surface and upper subsoil. At 80 cm depth the salinity increases to low to moderate. |  The clay content increases gradually with depth. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC (dS/m) | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||
meq/100g | ||||||||
A11 | 0-20 | 5 | 4.4 | 0.14 | 4.3 | 1.5 | 0.2 | 0.1 |
A12 | 20-30 | 5.3 | 4.5 | 0.08 | 4 | 1.7 | <0.1 | 0.1 |
B1 | 30-50 | 5.6 | 4.7 | 0.07 | 4.1 | 2.5 | <0.1 | 0.2 |
B21 | 50-60 | 5.3 | 4.6 | 0.2 | 3.4 | 3.2 | <0.1 | 0.5 |
B22 | 60-100 | 5.3 | 4.7 | 0.35 | 3.6 | 4.5 | <0.1 | 0.6 |
Horizon | Horizon Depth (cm) | Acidity meq/100g | Oxidisable Organic Carbon % | Total Nitrogen % | 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) |
A11 | 0-20 | | 4.0 | 0.3 | 33.2 | 14.1 | 7 | 39 | 21 | 25 |
A12 | 20-30 | | 2.3 | 0.15 | 29.6 | 11.5 | 7 | 41 | 19 | 28 |
B1 | 30-50 | 8.3 | | | 28.1 | 11.6 | 7 | 40 | 19 | 31 |
B21 | 50-60 | 11.0 | | | 33 | 17.6 | 6 | 31 | 16 | 44 |
B22 | 60-100 | | | | 34.5 | 19.1 | 6 | 29 | 14 | 50 |
© State of Victoria (Agriculture Victoria) 1996 - .
This work, Victorian Resources Online, is licensed under a Creative Commons Attribution 4.0 licence. You are free to re-use the work under that licence, on the condition that you credit the State of Victoria (Agriculture Victoria) as author, indicate if changes were made and comply with the other licence terms.
The licence does not apply to ‘branding’ or some ‘images or photographs’ that may be owned by third parties. We ask you to seek prior approval to use images using the VRO feedback form. Access to higher quality images can also be provided on request.
This page was last updated on .