Location: Mirranatwa
Australian Soil Classification: Bleached-Mottled, Eutrophic, Brown CHROMOSOL (thick surface horizon)
General Landscape Description: Rolling low hills - dissected Tertiary peneplain
Site Description: Grazing paddock – never limed. Paired catchment experimental site.
WCSS09 Landscape
Soil Profile Morphology:
Surface Soil
A1 | 0-17 cm | Very dark greyish brown (10YR3/2); loam; weak coarse to medium blocky, parting to moderate coarse to medium granular structure; very weak to weak consistence, dry; pH 5.8; clear change to: | WCSS09 Profile | Soil pit 2-3 m depth | |
A2 | 17-50 cm | Pale brown (10YR6/3), conspicuously bleached (10YR 7/1 dry); light fine sandy clay loam; massive ; firm (dry) consistence; fine to coarse macropores common; pH 6.1; clear change to: | |||
Subsoil | |||||
B21 | 50-90 cm | Yellowish brown (10YR5/6) with yellowish red (5YR 5/6) mottles and brown 10YR 4/3 cutans; medium clay; weak coarse prismatic, parting to strong coarse subangular blocky (dark faces), further parting to strong medium to fine polyhedral structure; shiny-faced peds; very firm to strong consistence (dry); few (2%) soft (2-3 mm) manganiferous segregations and ferromanganiferous nodules (2-3 mm size); surface material down cracks to 100 cm; pH 6.7; gradual change to: | |||
B22 | 90-130 cm | Yellowish brown (10YR5/6) with greyish brown (10YR5/2), grey (10YR6/1) and red (2.5YR4/6) mottles; heavy clay; weak medium prismatic, parting to strong medium to fine subangular blocky structure; shiny-faced peds; very firm to strong consistence (dry); pH 6.4; gradual change to: | |||
B23 | 130-150+ cm | Grey (10YR6/1) with brownish yellow (10YR6/8) and red (2.5YR5/6) mottles; medium clay; strong coarse to medium subangular blocky structure; very few (<1%) ferromanganiferous nodules; pH 6.6. |
- | pH | Salinity | ||
Surface Soil (A1 horizon) | Moderately Acid | Very Low | Non-Sodic | None |
Subsoil (50-90 cm) | Slightly Acid | Very Low | Non-Sodic | None |
Deeper Subsoil (130-150 cm) | Slightly Acid | Low | Non-Sodic | None |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | Organic Carbon % | Exchangeable Aluminium ppm | 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 | 0-17 | 5.8 | 5.2 | 0.09 | 3.2 | 11 | 10 | 3.4 | 1.6 | 0.23 | 0.14 | 14 | 36 | 17 | 16 | 22.2 | 8 |
A2 | 17-50 | 6.1 | 5.1 | <0.05 | 4 | 1.5 | 1.1 | 0.22 | <0.05 | 16 | 49 | 16 | 14 | 18.3 | 4.4 | ||
B21 | 50-90 | 6.7 | 6.0 | 0.15 | 7.8 | 4.3 | 7 | 1.3 | 0.13 | 4 | 54 | 6 | 70 | 41.4 | 23.1 | ||
B22 | 90-130 | 6.4 | 6.0 | 0.36 | 6.6 | 3.2 | 7.2 | 0.94 | 0.08 | 4 | 15 | 9 | 66 | 41.7 | 23 | ||
B23 | 130-150+ | 6.6 | 6.1 | 0.45 | 5.5 | 2.3 | 6.4 | 1.3 | 0.07 | 9 | 26 | 11 | 52 | 58.9 | 18.3 | ||
300 | 5.7 | 5.4 | 0.83 |