TOPCROP13
Location: Lubeck
Australian Soil Classification: Vertic (& Hypercalcic), Mottled-Mesonatric, Grey SODOSOL
General Landscape Description: Gently undulating plain.
Site Description: Base of slope. Cropping paddock.
Geology: Quaternary (Woorinen Formation) deposits overlying Tertiary (Parilla Sandstone).
 TOPCROP13 Landscape |
Soil Profile Morphology:
Surface Soil
| A1 | 0-12 cm | Dark grey (10YR4/1); heavy sandy clay loam; moderate coarse to medium sub-angular blocky structure; worms present; weak consistence moist; pH 6.4; sharp change to: |
 TOPCROP13 Profile |
| Subsoil |  | | |
| B21 | 12-30 cm | Pale brown (10YR6/3) with brown (7.5YR4/4) mottles; some surface soil material present; medium heavy clay; moderate coarse to medium sub-angular blocky structure; lenticular structure in patches; many slickensides present; weak to firm consistence moist; pH 8.4; clear and wavy change to: | |
| B22 | 30-65 cm | Pale brown (10YR6/3) with light brown (7.5YR6/4) in some areas, and light brown (7.5YR6/4) with pale brown (10YR6/3) in other areas; medium heavy clay; many slickensides present; strong cracking evident; sandy along vertical crack faces; firm consistence moist; very few (2%) fine earth carbonates; slightly calcareous; pH 9.3; gradual and wavy change to: | |
| B23k | 65-90 cm | Light brownish grey (10YR6/2) with strong brown (7.5YR5/6) mottles; medium clay; strong coarse to medium sub-angular blocky structure; fine earth carbonates common (5-20%); firm consistence moist; pH 9.4; gradual and wavy change to: | |
| B24k | 90-115 cm | Light yellowish brown (10YR6/4) with faint reddish yellow (7.5YR6/6) mottles; medium heavy clay; firm consistence moist; few (5-10%) coarse (5-15 mm) ferruginous nodules; few (5-10%) semi-hard fine-earth carbonates in tongues; pH 6.2: | |
| B25 | 115-140 cm | Light yellowish brown (10YR6/4) with yellowish red (5YR5/8) and light grey (10YR7/1) mottles; heavy clay; strong coarse to medium sub-angular blocky structure; few (10%) dark manganese stains with some ferruginous nodules; very firm consistence moist; pH 8.9. |
Soil Profile Characteristics:
| - | pH | Salinity | ||
Surface (A1 horizon) | Slightly Acid | Moderate | Non Sodic | None |
Subsoil (B21 horizon) | Moderately Alkaline | Moderate | Strongly Sodic | Strong1 |
Deeper Subsoil (at 1 metre) | Very Strongly Alkaline | Extremely Saline | Strongly Sodic | Slight2 |
| The surface soil is slightly acid. The upper subsoil is moderately alkaline becoming very strongly alkaline with depth. | | The salinity rating is moderate in the surface and upper subsoil. The deeper subsoil has an extremely high saline rating. | | The surface is non-sodic. The subsoil is strongly sodic. | | The boron levels increase in the subsoil. | | The clay content increases markedly at the surface / subsoil boundary. |
Chemical and Physical Analysis:
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | Sodium Chloride % | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
A1 | 0-12 | 6.4 | 6.1 | 0.42 | <0.01 | 7.5 | 3.1 | 0.4 | 0.2 |
B21 | 12-30 | 8.4 | 7.5 | 0.36 | 0.01 | 7.7 | 13 | 0.6 | 5 |
B22 | 30-65 | 9.3 | 8.7 | 1 | 0.13 | 5.4 | 15 | 0.7 | 9.1 |
B23k | 65-90 | 9.4 | 8.7 | 1.1 | 0.18 | 5.1 | 15 | 0.7 | 10 |
B24k | 90-115 | 9.2 | 8.6 | 1.3 | 0.21 | 4.9 | 17 | 0.8 | 11 |
B25 | 115-140 | 8.9 | 8.3 | 1.2 | 0.2 | 4 | 16 | 0.7 | 11 |
Horizon | Horizon Depth (cm) | Boron mg/kg | 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) % |
A1 | 0-12 | 1.7 | 15 | 0.11 | 23.8 | 9.5 | 29 | 36 | 4 | 25 |
B21 | 12-30 | 3.5 | 0.32 | | 34.8 | 16.1 | 22 | 26 | 7 | 39 |
B22 | 30-65 | 9.2 | <0.3 | | 39.9 | 19.4 | 22 | 24 | 11 | 38 |
B23k | 65-90 | 7.3 | <0.3 | | 40.6 | 18.1 | 19 | 19 | 7 | 37 |
B24k | 90-115 | 7.8 | <0.3 | | 42.9 | 20.1 | | | | |
B25 | 115-140 | | <0.3 | | | | 20 | 25 | 5 | 45 |
NOTES: Gypsum applied to paddock.
Profile Described By: Mark Imhof (July 2007).
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