Victorian Resources Online (archived)
SW43
Location: Laang
Australian Soil Classification: Bleached-Vertic, Eutrophic, Brown KUROSOL
General Landscape Description: Gently undulating plain.
Site Description: Grazing paddock (dairy).
Mapping Unit: Unit 40 (Maher and Martin, 1987).
Geology: Quaternary - Newer volcanics (basalt).
 SW43 Landscape |
Soil Profile Morphology:
Surface Soil
| A1 | 0-15 cm | Very dark greyish brown (10YR3/2); very fine sandy clay loam; moderate medium blocky, parting to moderate to strong fine polyhedral structure; weak structure moist; contains very few (2%) ferruginous nodules (2-4 mm in size); pH 5.4; clear change to: |  SW43 Profile |
| A21 | 15-30 cm | Brown (10YR5/3), conspicuously bleached; fine sandy clay loam; weak to firm consistence moist; contains a few (5%) ferruginous nodules (2-10 mm in size); pH 5.5; clear change to: | |
| A22 | 30-45 cm | Pale brown (10YR6/3), conspicuously bleached; fine sandy clay loam (heavy); moderate coarse polyhedral, parting to medium polyhedral structure; strong consistence, dry; contains a common (20%) amount of ferruginous nodules (2-5 mm in size); pH 5.8; clear change to: | |
| Subsoil | |||
| B21 | 45-60 cm | Yellowish brown (10YR5/4) with a few (10%) strong brown (7.5YR5/6) and brownish yellow (10YR6/6) mottles; mediumclay; moderate medium polyhedral, parting to strong fine polyhedral structure; weak consistence moist; pH 5.4; gradual change to: | |
| B22 | 60-80 cm | Yellowish brown (10YR5/4) with common (15%) strong brown (7.5YR5/6) mottles; medium heavy clay; strong medium polyhedral, parting to strong fine polyhedral structure; strong consistence, dry; some basalt fragments in patches; pH 5.5; clear change to: | |
| B23 | 80+ cm | Greyish brown (2.5Y5/2) with many (20%) yellowish brown (10YR5/8) mottles; medium clay; strong fine to very fine polyhedral structure; strong consistence, dry; pH 5.7. |
Key Profile Features:
- Strong texture contrast between surface (A) horizon and subsoil (B21) horizon.
Soil Profile Characteristics:
pH | Salinity Rating | Sodicity | Dispersion | |
Surface (A1 horizon) | Strongly Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | Strongly Acid | Very Low | Non-Sodic | None |
Deeper subsoil (at 80+ cm) | Moderately Acid | Very Low | Sodic | None |
 The surface and upper sub-soil is strongly acid. The subsoil becomes moderately acid at 80 cm depth. |  The salinity rating is low-very low throughout the soil profile. |  The clay content increases markedly at 45 cm depth. |
Chemical and Physical Analysis:
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | Organic Carbon % | Total Nitrogen % | Exchangeable Acididty meq/100g | Exchangeable Cations | Coarse Sand (0.2-2.0 mm) % | Fine Sand (0.02-0.2 mm) % | Silt (0.002-0.02 mm) % | Clay (<0.002 mm) % | Field Capacity % w/w | Wilting Point % w/w | |||
Ca | Mg | K | Na | ||||||||||||||
meq/100g | |||||||||||||||||
A1 | 0-15 | 5.4 | 4.7 | 0.12 | 7.1 | 0.56 | 5.5 | 1 | 0.3 | 0.1 | 9 | 32 | 29 | 16 | 43.2 | 16.4 | |
A21 | 15-30 | 5.5 | 4.8 | 0.9 | 1.7 | 1.5 | 0.1 | 0.05 | 9 | 34 | 32 | 23 | 30.8 | 10.5 | |||
A22 | 30-45 | 5.8 | 4.8 | 0.06 | 1.5 | 2.4 | 0.1 | 0.1 | 7 | 35 | 30 | 26 | 28.1 | 10.9 | |||
B21 | 45-60 | 5.4 | 4.8 | 0.11 | 12 | 2.5 | 7.5 | 0.2 | 0.6 | 3 | 15 | 15 | 64 | 45.3 | 27.9 | ||
B22 | 60-80 | 5.5 | 4.8 | 0.12 | 2.7 | 9.4 | 0.1 | 0.9 | 1 | 10 | 13 | 73 | 51 | 32.3 | |||
B23 | 80+ | 5.7 | 5.0 | 0.12 | 2.3 | 8 | 0.1 | 1.1 | 3 | 16 | 15 | 65 | 44.7 | 27 | |||
Profile Described By: Mark Imhof and Austin Brown (August 1998).
