Mapsheet: ST. ARNAUD | Aust. Soil Geology: Tertiary (Miocene) period river gravel deposits.Class.: Ferric, Eutrophic, Red CHROMOSOL |
Northcote Factual Key: Dr 2.22 | Geology: Tertiary (Miocene) period river gravel deposits. |
General Landscape Description: Midslope of rise. Original vegetation included Grey Box (Eucalyptus microcarpa). This site is located approximately 4 km east of Kooreh. |
Soil Site LP 40 Landscape |
A11 | 0-10 cm | Dark reddish brown (5YR3/4); heavy sandy loam; hardsetting surface condition when dry; weak medium blocky structure; firm consistence dry; ironstone nodules common (15%) with a few (5%) quartz fragments; pH 5.5; clear and wavy change to: | Soil Site LP40 Profile |
A12 | 10-40 cm | Dark red (2.5YR3/6); clayey (coarse) sand; firm to very firm consistence dry; contains very many (60%) quartz fragments and ironstone nodules are common (20%); pH 6.2; clear and wavy change to: | |
Subsoil | |||
B21 | 40-55 cm | Dark red (2.5YR4/8); medium clay; strong fine-medium polyhedral structure; strong consistence dry; contains few (5%) quartz fragments and few (5%) ferruginous nodules; pH 7.0; clear change to: | |
B22 | 55-80 cm | Brownish yellow (10YR6/8) with red (2.5YR4/8) mottles; medium clay; strong medium polyhedral structure; very firm consistence dry; pH 7.3; clear change to: | |
C | 80 cm + | Rounded quartz gravels (variably cemented). |
pH | Salinity Rating | |||
Surface (A1 horizon) | strongly acid | very low | non-sodic | none |
Subsoil (40 - 55 cm) | neutral | very low | non-sodic | none |
Deeper subsoil (55 - 80 cm) | slightly alkaline | very low | non-sodic | none |
Horizon | Horizon Depth | pH (water) | pH CaCl2 | EC 1:5 | NaCl | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
Meq/100g | |||||||||
A11 | 0-10 | 5.5 | 4.8 | 0.12 | 3.5 | 0.9 | 1 | <0.1 | |
A12 | 10-40 | 6.2 | 5.2 | <0.05 | 2.9 | 1 | 0.5 | 0.1 | |
B21 | 40-5 | 7 | 6.1 | 0.05 | 6.2 | 3.3 | 0.4 | 0.3 | |
B22 | 55-80 | 7.3 | 6.3 | <0.05 | 6.3 | 4.5 | 0.2 | 0.4 |
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) |
A11 | 0-10 | 15 | 7.9 | ||||||
A12 | 10-40 | 10.3 | 6.3 | ||||||
B21 | 40-5 | 25.7 | 19.3 | ||||||
B22 | 55-80 |