Location: Cressy
Australian Soil Classification: Melanic, Hypercalcic, Black VERTOSOL (or DERMOSOL) (Clayey)
General Landscape Description: Lunette
Site Description: Crest.
Land Use: Pasture prior to forming into raised beds for cropping. Southern Farming Systems (SFS) trial site.
Geology: Quaternary aeolian deposits: sand, clay, calcareous sand
SFS21 Landscape |
Surface Soil | SFS21 Profile | ||
A11 | 0-10 cm | Black (10YR2/1); self mulching suface condition; light clay; fine crumb structure; pH 6.3; clear change to: | |
A12 | 10-30 cm | Black (10YR2/1); light clay; rough peds; fine to medium polyhedral structure; strong consistence; pH 6.3; clear change to: | |
Subsoil | |||
B21 | 30-60 cm | Very dark grey (7.5YR3/1); light medium clay; moderate coarse polyhedral, parting to strong fine polyhedral structure; pH 7.3; clear change to: | |
B22k | 60-130+ cm | Light brownish grey (2.5Y6/2); light medium clay; apedal; very common fine pores; some larger root channels infilled with A and B horizon material; highly calcareous; pH 8.5. |
pH | Salinity Rating | |||
Surface (A1 horizon) | Slightly Acid | Low | Non-Sodic | None |
Subsoil (B21 horizon) | Slightly Alkaline | Very Low | Non-Sodic | None1 |
Deeper Subsoil (at 75-85 cm) | Moderately Alkaline | Low | Non-Sodic | None |
The pH in the surface is slightly acid. The pH in the subsoil is slightly alkaline, becoming moderately alkaline with depth. | The salinity rating is low to very low throughout the profile. | The clay content increases sharply at the surface / subsoil interface. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC dS/m | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
A1 | 0-10 | 6.3 | 5.9 | 0.30 | 0.04 | 11.0 | 5.5 | 2.3 | 0.3 |
A12 | 10-30 | 6.3 | 5.7 | 0.09 | 12.0 | 8.0 | 2.6 | 0.27 | |
B21 | 30-60 | 7.3 | 6.8 | 0.19 | 18.0 | 16.0 | 2.6 | 0.41 | |
B22k | 60-130+ | 8.5 | 8.0 | 0.26 | 24.0 | 15.0 | 1.4 | 0.48 |
Horizon | Horizon Depth (cm) | Exchangeable Aluminium mg/kg | Exchangeable Acidity meq/100g | Oxidisable 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 | 0-10 | 11 | 4.2 | 0.4 | 36.3 | 20.9 | 12 | 19 | 16 | 45 | |
A12 | 10-30 | <10 | 8.7 | 33.2 | 20.6 | 16 | 17 | 13 | 48 | ||
B21 | 30-60 | 48.6 | 31.4 | 5 | 8 | 7 | 72 | ||||
B22k | 60-130+ | 39.3 | 25.2 | 3 | 7 | 9 | 43 |