Location: Werribee
Australian Soil Classification: Calcic, Subnatric, Red SODOSOL (medium to thick surface horizons)
Northcote Factual Key: Dr 2.13
Great Soil Group: red-brown earth
Previous Soil Type (Skene 1954): Werribee Loam
Map Unit (Maher and Martin, 1979) : 10b
General Landscape Description: Level plain (with prior streams).
Site Description: Grazing paddock.
Geology: Quaternary alluvial (prior stream) and aeolian deposits.
Soil Pit WP1 Landscape |
Surface Soil | Soil Pit PPW4 Profile | ||
A1 | 0-12 cm | Brown (7.5YR4/4); fine sandy clay loam; weak coarse subangular blocky structure; very firm consistence (dry); pH 5.8; clear change to: | |
A21 | 12-20 cm | Brown (7.5YR4/6); heavy fine sandy clay loam; strong consistence (dry); macropores present; pH 6.7; clear change to: | |
A22 | 20-30cm | Brown (7.5YR4/6); heavy fine sandy clay loam; massive; strong consistence (dry); pH 7.2; abrupt change to: | |
Subsoil | |||
B21 | 30-40 cm | Dark red (2.5YR4/8); medium clay; medium very coarse prismatic, parting to strong very coarse to coarse angular blocky structure; strong consistence (dry); few roots evident; pH 7.1; clear change to: | |
B22 | 40-60 cm | Dark red (2.5YR4/6); medium clay; medium very coarse prismatic, parting to strong coarse to medium angular, further parting to strong fine subangular blocky structure; few manganese flecks (5%); pH 7.5:; abrupt change to: | |
2B21 | 60-75 cm | Strong brown (7.5YR5/6 & 5/8); light clay (fine sandy); medium coarse blocky structure; pH 7.8: | |
2B22k | 75-100 cm | Brown (7.5YR5/4); light clay (fine sandy); few (2-5%) coarse (6-20 mm) tubular calcareous segregations with some patches of fine-earth carbonates; pH 8.3: | |
2B23 | 100-130 cm | Brown (7.5YR5/4); light clay; pH 8.2: | |
2B24 | 130-150 cm | Brown (7.5YR4/4); light medium clay; strong coarse blocky structure; pH 8.1. |
pH | Salinity Rating | |||
Surface (A1 horizon) | Moderately Acid | Very Low | Non-Sodic | None |
Subsoil (B21 horizon) | Slightly Alkaline | Very Low | Sodic | Slight-Moderate1 |
Deeper subsoil (at 130-150 cm) | Moderately Alkaline | Low | Sodic | None1 |
1 complete dispersion after remoulding |
Horizon | Horizon Depth (cm) | pH (water) | pH CaCl2 | EC dS/m | NaCl % | Exchangeable Cations | 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) | |||
Ca | Mg | K | Na | ||||||||||||||
meq/100g | |||||||||||||||||
A1 | 0-12 | 5.7 | 5.5 | 0.19 | 5.1 | 3.9 | 0.39 | 0.36 | <10 | 7.1 | 33.6 | 10.5 | 19 | 36 | 19 | 16 | |
A21 | 12-20 | 6.7 | 6.3 | 0.11 | 3.5 | 2.8 | 0.12 | 0.38 | 3.7 | 27.7 | 5.4 | 16 | 43 | 21 | 16 | ||
A22 | 20-30 | 7.2 | 6.8 | 0.12 | 2.8 | 2.4 | 0.10 | 0.56 | 2.7 | 19.7 | 5.9 | 15 | 42 | 23 | 20 | ||
B21 | 30-40 | 7.1 | 6.4 | 0.15 | 5.9 | 7.4 | 0.34 | 1.6 | 7.2 | 34.7 | 18.1 | 3 | 26 | 21 | 48 | ||
B22 | 40-60 | 7.5 | 6.8 | 0.19 | 5.7 | 7.9 | 0.35 | 1.6 | 4.3 | 33.3 | 15.1 | 3 | 36 | 18 | 40 | ||
2B21 | 60-75 | 7.8 | 7.3 | 0.26 | 0.05 | 4.9 | 6.2 | 0.3 | 1.2 | 29.1 | 11.2 | 7 | 31 | 27 | 30 | ||
2B22k | 75-100 | 8.3 | 7.9 | 0.33 | 0.05 | 7.2 | 7.0 | 0.4 | 1.4 | 27.8 | 12.5 | 4 | 28 | 33 | 32 | ||
2B23 | 100-130 | 8.2 | 7.5 | 0.2 | 5.1 | 5.1 | 0.55 | 1.5 | |||||||||
2B24 | 130-150 | 8.1 | 7.4 | 0.21 | 5.3 | 6.6 | 0.39 | 1.7 |