Location: Murrayville Landcare Group. | Australian Soil Classification: Epibasic, Petrocalcic, Lithocalcic, CALCAROSOL |
General Landscape Description: Low rise on a gently undulating plain. | Geology: Quaternary (Woorinen Formation) deposits. |
A11 | 0-10 cm | Dark greyish brown (7.5YR3/4); sandy loam; non-calcareous; pH 7.8: | MP49 Profile |
A12 | 10-20 cm | Reddish brown (5YR5/8); sandy clay loam; very firm consistence dry; contains many (40%) soft calcareous segregations and calcrete fragments formed insitu; moderately calcareous; pH 8.2: | |
Subsoil | |||
C | 20-45 cm | Calcrete Layer: | |
2B21 | 45-70 cm | Lightish red-brown (2.5YR5/8); light clay (fine sandy); contains many (50%) soft calcareous segregations with calcrete fragments are common (20%); highly calcareous; many macropores; pH 9.6: | |
2B22 | 70-100 cm | Light medium clay (sandy); soft calcareous segregations are common (20%); highly calcareous; pH 9.8: | |
2B23 | 100+ cm | Medium clay (fine sandy); contains a few (2-5%) soft manganiferous segregations; moderately calcareous; pH 9.4. |
pH | Salinity Rating | |||
Surface (A11 horizon) | Slightly alkaline | Low | Non-sodic | None |
Sub-surface (A12 horizon) | Moderately alkaline | Low | Non-sodic | None1 |
Deeper Subsoil (at 0.45 m) | Very strongly alkaline | Very high | Sodic | None2 |
The soil profile becomes increasingly alkaline with depth. | The level of soluble salts increases with depth. | The soil profile becomes increasingly sodic with depth. | The clay content gradually increases with depth. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | NaCl % | Total Nitrogen % | Organic Carbon % | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||||
meq/100g | |||||||||||
A11 | 0-10 | 7.8 | 7.1 | 0.19 | 0.12 | 1.5 | 6.5 | 2.1 | 1.4 | 0.09 | |
A12 | 10-20 | 8.2 | 7.6 | 0.17 | 11 | 3.5 | 1 | 0.19 | |||
2B21 | 45-70 | 9.6 | 8.9 | 1.1 | 0.2 | 5.6 | 8.3 | 0.7 | 2.1 | ||
2B22 | 70-100 | 9.8 | 9 | 0.97 | 0.18 | ||||||
2B23 | 100+ | 9.4 | 8.6 | 1.4 | 0.28 | 1.1 | 11 | 1.8 | 5.1 |
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) |
A11 | 0-10 | 11 | 5 | 39 | 45 | 4 | 12 | ||
A12 | 10-20 | 14 | 6 | 34 | 42 | 5 | 18 | ||
2B21 | 45-70 | <5 | 20 | 28 | 7 | 13 | |||
2B22 | 70-100 | - | |||||||
2B23 | 100+ | <5 | 20 | 38 | 13 | 27 |