Property: LP45 | Australian Soil Classification: Epicalcareous-Epihypersodic, Epipedal, Brown VERTOSOL |
Northcote Factual Key: Ug 5.2 | Great Soil Group: grey clay |
General Landscape Description: Old alluvial plain with Black Box (Eucalyptus largiflorens). Gilgai microrelief is present. |
LP45 Landscape |
A1 | 0-10 cm | Dark brown (10YR3/3); light medium clay; surface crusting; moderate coarse blocky structure; very firm consistence dry; pH 6.5; abrupt change to: | LP45 Profile |
Subsoil | |||
B21 | 10-20 cm | Dark greyish brown (10YR4/2); medium heavy clay; strong fine polyhedral structure; strong consistence dry; pH 8.0; clear change to: | |
B22 | 20-45 cm | Brown (10YR5/3) and yellowish brown (10YR5/4); medium clay; strong coarse blocky, parting to moderate medium polyhedral structure; firm consistence moist; pH 8.7; clear change to: | |
B23k | 45-65 cm | Light yellowish brown (10YR6/4); medium clay; strong coarse to medium polyhedral structure; contains few (10%) calcareous nodules; strong consistence moist; pH 9.0; gradual change to: | |
B31 | 65-100 cm | Pale brown (10YR6/3); medium clay; strong medium polyhedral, parting to strong fine polyhedral structure; contains a few (2-5%) calcareous nodules (with silica) and a few (<5%) gypsum crystals in pockets as well as manganese stains; very firm consistence moist; pH 8.1; gradual change to: | |
B32 | 100+ cm | Light yellowish brown (10YR6/4); medium clay; strong medium polyhedral structure; small slickensides present; strong consistence moist; pH 8.3. | |
Note: This soil corresponds partly to Kerang Clay as described by Skene (1971). |
pH | Salinity Rating | |||
Surface (A1 horizon) | slightly acid | low | nearly sodic | none1 |
Subsoil (B21 horizon) | moderately alkaline | very low | sodic | strong |
Deeper subsoil (1 m) | moderately alkaline | medium - high | strongly sodic | - |
1 Strong dispersion after remoulding. |
Horizon | Horizon Depth | pH (water) | EC 1:5 | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||
meq/100g | ||||||||
A1 | 1-10 | 6.5 | 0.13 | 8.2 | 4.4 | 1.1 | 0.7 | |
B21 | 1-20 | 8 | 0.16 | 11 | 8.2 | 1.5 | 3 | |
B22 | 20-45 | 8.7 | 0.38 | <0.05 | 11 | 9.1 | 1.3 | 5.5 |
B23K | 45-65 | 9 | 0.7 | 0.06 | 9.3 | 10 | 1.4 | 7.3 |
B31 | 65-100 | 8.1 | 2.65 | 0.12 | 10 | 9.3 | 1.5 | 9.3 |
B32 | 100+ | 8.3 | 2.4 | 0.17 | 8 | 13 | 1.4 | 11 |
Horizon | Horizon Depth | Ex Al mg/kg | Ex Ac meq/100g | Field pF2.5 | Wilting Point pF4.2 | Coarse Sand (0.2-2.0mm) | Fine Sand (0.02-0.2mm) | Silt (0.002-0.02mm) | Clay (<0.002mm) |
A1 | 1-10 | 26.3 | 17.2 | 7 | 30 | 15 | 45 | ||
B21 | 1-20 | 39.5 | 27.4 | 4 | 16 | 11 | 66 | ||
B22 | 20-45 | ||||||||
B23K | 45-65 | ||||||||
B31 | 65-100 | ||||||||
B32 | 100+ |