Locaton: Lara
Australian Soil Classification: Episodic-Endocalcareous, Self-Mulching, Black VERTOSOL
General Landscape Description: Alluvial plain.
Site Description: Flat below monocline.
Geology: Quaternary Basalt (Lovely Banks Monocline)
SW101 Landscape |
Soil Profile Morphology:
A1 | 0-10 cm | Very dark grey (5YR3/1 moist); light medium clay; self-mulching surface condition; fine structure; rough faced peds; pH 6.9; clear and smooth change to: | SW101 Profile - Note: Surface stripped from soil profile. |
Subsoil | |||
B21t | 10-30/40 cm | Very dark grey (5YR3/1 moist); medium clay; strong polyhedral structure; prominent small slickensides; pH 8.5; clear and wavy change to: | |
B22ss | 30/40-65/75 cm | Dark reddish brown (5YR3/2 moist); prismatic, polyhedral and lenticular structure; frequent large (>300 mm) slickensides; pH 9.2; abrupt to clear and wavy change to: | |
B23kss | 65/75+ cm | Dark greyish brown (2.5Y4/2 moist) or grey (2.5Y5/1); light clay; very large slickensides (up to 1 m); abundant large patches of whitish soft carbonate. |
pH | Salinity Rating | |||
Surface (A1 horizon) | Slightly Acid | Low | Strongly Sodic | None1 |
Subsoil (B21 horizon) | Moderately Alkaline | High | Strongly Sodic | Strong-Complete |
Deeper Subsoil (at 40-60 cm) | Very Strongly Alkaline | Very High | Strongly Sodic | Strong-Complete |
1 Complete dispersion after remoulding. |
The surface is slightly acid. The subsoil is moderately alkaline becoming very strongly alkaline at depth. | Salinity rating is low in the surface. The upper subsoil is high becoming very high in the deeper subsoil. | The profile is strongly sodic throughout. | The clay content is high throughout the profile. |
Horizon | Sample Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | NaCl % | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
A1 | 0-10 | 6.9 | 5.9 | 0.28 | 0.03 | 7.8 | 8.8 | 0.7 | 4 |
B21ss | 15-30 | 8.5 | 7.8 | 0.92 | 0.15 | 11 | 15 | 1 | 16 |
B22ss | 40-60 | 9.2 | 8.6 | 1 | 0.20 | 8.7 | 14 | 1 | 17 |
Horizon | Sample Depth (cm) | Exchangeable Acidity meq/100g | Organic Carbon % | Nitrogen % | Field Capacity 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 | 0-10 | 12 | 2.5 | 0.24 | 42.1 | 23.4 | 6 | 24 | 21 | 41 |
B21ss | 15-30 | 74.2 | 36.7 | 3 | 11 | 23 | 55 | |||
B22ss | 40-60 | 61.4 | 34.3 | 5 | 22 | 36 | 33 |