Location: Bushy Park. | Australian Soil Classification: Magnesic, Mottled-Mesonatric, Yellow SODOSOL |
Great Soil Group: solodic | Geology: Pleistocene sediments (quartz gravel probably derived from Carboniferous sediments in uplands). |
General Landscape Description: Gently undulating plain. | Mapping Unit: Briagolong |
Site Description: Grazing paddock. |
Site GP78 Landscape |
Surface Soil | Site GP78 Profile | ||
A1 | 0-10 cm | Dark brown (10YR3/3); fine sandy loam; weakly structured, very firm consistence dry; pH 5.1: | |
A2 | 10-25 cm | Brown (7.5YR5/4) bleached (7.5YR7/2); fine sandy loam; weak structure; very firm consistence dry; contains many (50%) quartz fragments (1-5 mm in size) and pebbles; pH 5.4; sharp change to: | |
Subsoil | |||
B21 | 25-50 cm | Brownish yellow (10YR6/6); medium clay; moderate coarse prismatic, parting to moderate coarse blocky structure; strong consistence dry; pH 6.7: | |
B22 | 50-80 cm | Light olive brown (2.5Y5/4) with strong brown (7.5YR5/6) mottles; medium clay; moderate coarse prismatic, parting to moderate coarse blocky structure; strong consistence dry; pH 7.7 | |
B23 | 80-130 cm | Yellowish brown (10YR5/6) with strong brown (7.5YR5/8) and grey (10YR6/1) mottles; light medium clay; moderate coarse prismatic parting to moderate coarse blocky structure; strong consistence dry; contains few (5-10%) manganese flecks; pH 8.0 | |
B24 | 130+ cm | Light grey (10YR7/1) with strong brown (7.5YR5/8) mottles; contains many (30%) rounded quartz pebbles (3-5 mm in size). Iron cemented river gravels occur from 150 cm depth |
pH | Salinity Rating | |||
Surface (A1 Horizon) | Strongly Acid | Moderate | Non-Sodic | --- |
Subsoil (B21 Horizon) | Slightly Acid | Very Low | Strongly Sodic | Complete |
Deeper Subsoil (at 1m) | Moderately Alkaline | Low | Strongly Sodic | Complete |
The soil profile becomes increasingly alkaline with depth. | The surface soil is non-sodic. The subsoil is strongly sodic throughout. | ||
The surface salinity rating is moderate. The subsoil rating is low. | The clay content increases significantly at the A/B horizon interface. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
meq/100g | |||||||||
A1 | 0-10 | 5.1 | 4.5 | 0.32 | 3.1 | 1.1 | 0.5 | 0.1 | |
A2 | 10-25 | 5.4 | 4.6 | 0.13 | 0.72 | 0.44 | 0.47 | 0.3 | |
B21 | 25-50 | 6.7 | 5.7 | 0.19 | 0.82 | 11 | 0.47 | 2.5 | |
B22 | 50-80 | 7.7 | 6.6 | 0.25 | 0.2 | 9.2 | 9.2 | 3.4 | |
B23 | 80-130 | 8 | 6.8 | 0.25 | 0.2 | 8.5 | 0.2 | 3.5 | |
B24 | 130+ |
Horizon | Horizon Depth (cm) | Exchangeable Aluminium mg/kg | Exchangeable Acidity meq/100g | 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 | <10 | 5.1 | 23 | 46 | 18 | 9 | ||
A2 | 10-25 | 11 | 2.6 | 27 | 48 | 17 | 7 | ||
B21 | 25-50 | 17.7 | 10 | 26 | 15 | 48 | |||
B22 | 50-80 | 14.7 | 8 | 29 | 19 | 42 | |||
B23 | 80-130 | ||||||||
B24 | 130+ |