Location: Simpson | Australian Soil Classification: Humose-Acidic, Dystrophic, Grey DERMOSOL |
General Landscape Description: Grazing paddock (dairy). | Mapping Unit: Simpson/Tomahawk Creek Land System (Pitt, 1981). |
Site Description: Gently undulating plain. | Geology: Tertiary - Moorabool Viaduct Formation. |
Site SW22 landscape |
O | 0-5 cm | Organic mat: | Site SW22 profile photo |
A1 | 5-25 cm | Black (10YR2/1); loam; moderate coarse blocky; weak consistence moist; pH 4.5; clear change to: | |
A2 | 25-45 cm | Very dark grey (10YR3/1); fine sandy loam; moderate coarse polyhedral structure; weak to firm consistence dry; pH 4.5; gradual change to: | |
Subsoil | |||
B1 | 45-80 cm | Dark brown (7.5YR3/2); light fine sandy clay loam; weak very coarse prismatic, parting to weak to moderate coarse blocky structure; firm consistence dry; pH 4.8; gradual change to: | |
B2 | 80+ cm | Brown (7.5YR5/2) with strong brown (7.5YR5/8) mottles; fine sandy clay loam; weak very coarse prismatic, parting to weak to moderate coarse blocky structure; firm to very firm consistence dry; pH 4.9. | |
pH | Salinity Rating | |||
Surface (A1 horizon) | Very Strongly Acid | Very Low | Non-Sodic | None |
Subsoil (B21 horizon) | Very Strongly Acid | Very Low | Non-Sodic | None |
Horizon | Horizon Depth (cm) | pH (water) | pH CaCl2 | EC 1:5 | Exchangeable Cations | |||
Ca | Mg | K | Na | |||||
meq/100g | ||||||||
A1 | 5-25 | 4.5 | 3.8 | 0.14 | 6.5 | 0.6 | 0.1 | 0.1 |
A2 | 25-45 | 4.5 | 3.8 | 0.08 | 1.1 | 0.2 | 0.05 | 0.05 |
B1 | 45-80 | 4.8 | 4.3 | 0.06 | 0.2 | 0.05 | 0.05 | 0.05 |
B21 | 80+ | 4.9 | 4.2 | <0.05 | 0.1 | 0.2 | 0.05 | 0.05 |
Horizon | Horizon Depth (cm) | 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 | 5-25 | 30 | 21 | 19 | 42 | 12 | 10 |
A2 | 25-45 | 18 | 9 | 17 | 50 | 19 | 9 |
B1 | 45-80 | 16 | 5 | 19 | 50 | 17 | 10 |
B21 | 80+ | 16 | 5 | 19 | 48 | 20 | 15 |