Location: Walpeup | Australian Soil Classification: Epibasic, Pedal, Hypercalcic CALCAROSOL |
General Landscape Description: Swale between east-west dunes | Site Description: Landcare delivery site |
Geology: Quaternary aeolian deposits (Woorinen Formation) |
LWA3 Landscape |
A11 | 0-6 cm | Dark brown (7.5YR3/4); loamy sand; loose; pH 7.5; clear change to: | LWA3 Profile |
A12 | 6-10 cm | Brown (7.5YR384); loamy sand; loose; weak consistence (dry); pH 6.8; clear change to: | |
A13 | 10-14 cm | Dark brown (7.5YR3/4); sandy loam (clayey); firm to very firm consistence (dry); some compaction; pH 7.2; sharp change to: | |
A2 | 14-28 cm | Reddish brown (5YR4/4); sandy loam (clayey); firm to very firm consistence (dry); hard surface; pH 7.8; slightly calcareous; abrupt change to: | |
Subsoil | |||
B1 | 28-35 cm | Yellowish red (5YR4/6); sandy clay loam; weak to moderate coarse to medium (10-50 mm) blocky; macropores present; pH 8.7; gradual change to: | |
B21 | 35-50 cm | Red (2.5YR4/6); light clay (sandy); weak coarse (50-100 mm) prismatic, parting to moderate to strong coarse (20-50 mm), and moderate to strong medium to fine (5-20 mm) subangular blocky structure; firm consistence (slightly moist); pH 9.3; gradual change to: | |
B22 | 50-65 cm | Yellowish red (5YR4/6); light clay (sandy); moderate strong to medium (10-50 mm) subangular blocky structure; strong consistence (dry); few (5%) soft carbonate nodules; pH 9.5; gradual change to: | |
B23k | 65-100 cm | Yellowish red (5YR5/6); light medium clay (sandy); weak to moderate strong to medium (10-50 mm), parting to moderate fine (5-10 mm) subangular blocky structure; very many (40%) fine earth carbonates and carbonate/silica nodules (5-20 cm); pH 9.8; gradual change to; | |
B24k | 100-140+ cm | Weak to moderate coarse (20-50 mm) subangular blocky, parting to weak to moderate medium to fine (5-20 mm) subangular blocky structure; many (20%) fine-earth carbonates and semi-hard calcareous nodules; pH 9.8. |
Key Profile Features:
pH | Salinity Rating | |||
Surface (Ap horizon) | Slightly alkaline | Low | Non-sodic | None |
Subsoil (B21 horizon) | Very strongly alkaline | Medium | Strongly sodic | Moderate1 |
Deeper subsoil (at cm) | Extremely alkaline | High | Strongly sodic | Complete |
Horizon | Horizon Depth | pH (water) | pH CaCl2 | EC 1:5 | Org. Carbon mg/kg | Exchangeable Cations | |||
Ca | Mg | K | Na | ||||||
Meq/100g | |||||||||
A11 | 0-6 | 7.5 | 7.2 | 0.18 | 0.77 | 4.2 | 1.2 | 1.1 | 0.2 |
A12 | 6-10 | 6.8 | 6.4 | 0.08 | 0.43 | 3.9 | 1.1 | 1.1 | 0.2 |
A13 | 10-14 | 7.2 | 6.7 | 0.08 | 0.38 | 5.4 | 1.5 | 1.3 | 0.2 |
A2 | 14-28 | 7.8 | 7.2 | 0.07 | 4.6 | 1.2 | 0.8 | 0.2 | |
B1 | 28-35 | 8.7 | 7.6 | 0.10 | 8.0 | 4.5 | 0.9 | 1.9 | |
B21 | 35-50 | 9.3 | 8.5 | 0.42 | 7.1 | 9.6 | 1.3 | 6.0 | |
B22 | 50-65 | 9.5 | 8.7 | 0.49 | |||||
B23K | 65-100 | 9.8 | 8.9 | 0.63 | |||||
B24K | 100-140 | 9.8 | 8.8 | 0.67 |
Horizon | Horizon Depth | Boron mg/kg | Field pF2.5 g/100g | Wilting Point pF4.2 g/100g | Coarse Sand (0.2-2.0mm) % | Fine Sand (0.02-0.2mm) % | Silt (0.002-0.02mm) % | Clay (<0.002mm) % |
A11 | 0-6 | 0.9 | 8.6 | 2.4 | 55 | 34 | 5 | 6 |
A12 | 6-10 | 0.7 | 9.7 | 2.3 | 50 | 38 | 6 | 6 |
A13 | 10-14 | 0.9 | 11.6 | 3.3 | 51 | 33 | 7 | 8 |
A2 | 14-28 | 1.2 | 16.6 | 3.2 | 47 | 36 | 8 | 9 |
B1 | 28-35 | 1.6 | 21.6 | 7.6 | 43 | 25 | 9 | 20 |
B21 | 35-50 | 5.5 | 36.3 | 17.8 | 31 | 20 | 13 | 32 |
B22 | 50-65 | 11.0 | 37.4 | 18.3 | 32 | 18 | 11 | 31 |
B23K | 65-100 | 19.0 | 35.2 | 19.3 | ||||
B24K | 100-140 | < 0.3 |