DU56
Location: Nirranda South
Australian Soil Classification: Vertic, Mottled-Subnatric, Brown SODOSOL
General Landscape Description: Mid slope of a gently undulating rise. Gilgai micro relief.
Site Description: Grazing paddock.
 DU56 Landscape |
Soil Profile Morphology:
Surface Soil
| O | 0-4 cm | Organic mat: |
 DU56 Profile |
| A1 | 4-12 cm | Very dark greyish brown (10YR3/2); sandy clay loam (spongy); weak coarse blocky parting to medium blocky structure; rusty root channel mottling; firm consistence dry; pH 5.9; clear change to: | |
| A2 | 12-20 cm | Light yellowish brown (10YR6/4) with dark greyish brown (10YR4/2) mottles; sandy clay loam; weak coarse blocky, parting to weak medium blocky structure; firm consistence dry; pH 6.6; sharp change to: | |
| Subsoil | |||
| B21 | 20-30 cm | Dark greyish brown (2.5Y4/2) with few yellowish brown (10YR5/8) mottles; medium heavy clay; moderate to strong coarse prismatic parting to moderate to strong coarse blocky structure; strong consistence dry; pH 7.1; clear change to: NOTE: Subsoil variability - B21 can also be 10YR3/2, light clay (fine sandy). | |
| B22 | 30-60 cm | Dark greyish brown (2.5Y4/2) with many yellowish brown (10YR5/6) mottles; light medium clay; strong consistence dry; contains few manganese stains in patches; pH 7.4; clear change to: | |
| B23 | 60-100 cm | Olive brown (2.5Y4/4) with many yellowish brown (10YR5/6) mottles; heavy clay; strong medium lenticular parting to fine lenticular structure; weak consistence dry; pH 7.2; clear change to: | |
| B24 | 100-140 cm | Yellowish brown (10YR5/6) with many greyish brown (2.5Y5/2) and few red (2.5YR5/6) mottles; medium heavy clay; strong coarse lenticular, parting to strong fine lenticular structure; weak consistence dry; contains very many ferruginous sub-rounded nodules (2-15 mm in size); pH 7.8. | |
Soil profile variability.
Key Profile Features:
- Soil profile variability associated with gilgai micro relief.
Soil Profile Characteristics:
 | pH | Salinity Rating | ||
Surface (A1 horizon) | Moderately Acid | Low | Non Sodic | None1 |
Subsoil (B21 horizon) | Slightly Alkaline | Very Low | Sodic | Slight2 |
Deeper Subsoil (at 100-140 cm) | Slightly Alkaline | Low | Sodic | None |
| | The surface soil is moderately acid. The subsoil is slightly alkaline. | | The salinity rating in the surface is low, the subsoil is very low to low. | | The surface is non sodic. The subsoil is sodic. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | NaCl % | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
O | 0-4 | | | | | | | | |
A1 | 4-12 | 5.9 | 5.3 | 0.17 | | 6.7 | 1.6 | 0.54 | 0.99 |
A2 | 12-20 | 6.6 | 5.8 | 0.09 | | 5.6 | 1.3 | 0.37 | 0.65 |
B21 | 20-30 | 7.1 | 6.5 | 0.16 | <0.01 | 6.7 | 1.9 | 0.7 | 1.4 |
B22 | 30-60 | 7.4 | 6.8 | 0.28 | 0.02 | 7.8 | 2.2 | 0.6 | 2.1 |
B23 | 60-100 | 7.2 | 6.9 | 0.45 | 0.05 | | | | |
B24 | 100-140 | 7.8 | 7.3 | 0.22 | 0.02 | | | | |
B25 | 140+ | 8 | 7.5 | 0.43 | 0.05 | | | | |
Horizon | Horizon Depth (cm) | Ammonium Nitrogen mg/kg | Nitrate Nitrogen mg/kg | Phosporus mg/kg | Exchangeable Acidity meq/100g | Bulk Density kg/L | Wilting Point pF4.2 |
O | 0-4 | | | | | | |
A1 | 4-12 | 7.7 | 2.7 | 29 | 13 | 1.1 | 13.3 |
A2 | 12-20 | 2.4 | 0.30 | 5 | 6.6 | 1.4 | 7.2 |
B21 | 20-30 | 2.1 | <0.25 | <1 | | | 15.2 |
B22 | 30-60 | | | | | | |
B23 | 60-100 | | | | | | |
B24 | 100-140 | | | | | | |
B25 | 140+ | | | | | | |
Profile Described By: Mark Imhof and Siegfried Engleitner (December 2003)
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