Group: Birchip Cropping Group | |
Australian Soil Classification: Episodic-Epicalcareous, Self-mulching, Brown VERTOSOL | |
General Landscape Description: Level alluvial plain within the Tyrell Creek Land System (Rowan and Downes, 1963). |
Site MP24 Landscape |
A1 | 0-10 cm | Dark brown (10YR4/3); light clay; self-mulching surface condition, friable consistence dry; surface cracking evident; pH 7.9: | Site MP24 Profile |
Subsoil | |||
B21 | 10-30 cm | Dark brown (10YR4/3); medium clay (subplastic); moderate prismatic, parting to strong very fine blocky structure; pH 8.9: | |
B22k | 30-55 cm | Brown (10YR5/3); light medium clay; very coarse prismatic, parting to strong medium to fine blocky structure; very firm to strong consistence dry; contains few (2-10%) fine earth carbonates; pH 9.1; sharp change to: | |
B23 | 55-100 cm | Light yellowish brown (10YR6/4); light medium clay; structure similar to above; strong consistence dry; pH 9.0; gradual change to: | |
B24 | 100-180 cm | Light medium clay; with soft manganese segregations in the 160 -180 cm zone; pH 9.1. | |
pH | Salinity Rating | |||
Surface (A1 horizon) | slightly alkaline | very low | sodic | none1 |
Upper Subsoil (B21 horizon) | strongly alkaline | medium | strongly sodic | moderate |
Deeper subsoil (at 1 m) | very strongly alkaline | very high | very strongly sodic | none2 |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC ds/m | NaCI % | Exchangeable Cations | Field Capacity pF 2.5 | Wilting Point pF 4.2 | Coarse Sand (0.2 - 2.0 mm) | Fine Sand (0.02 -0.2 mm) | Silt (0.002 -0.02 mm) | Clay (<0.002 mm) | |||
Ca | Mg | K | Na | ||||||||||||
meq/100g | |||||||||||||||
A1 | 0-10 | 7.9 | 7 | 0.13 | 20.6 | 6.6 | 2.4 | 1.9 | 44 | 25 | 11 | 14 | 8 | 60 | |
B2 | 10-30 | 8.9 | 8 | 0.67 | 0.08 | 16.2 | 11.3 | 2.2 | 12.8 | 57 | 35 | 5 | 6 | 28 | 48 |
B22 | 30-55 | 9.1 | 8.6 | 2.5 | 0.47 | 8.6 | 12.4 | 2 | 22.7 | 59 | 35 | ||||
B23 | 55-100 | 9 | 8.6 | 3.78 | 0.76 | 7.7 | 12.8 | 1.7 | 23.9 | 53 | 26 | ||||
B24 | 100-180 | 9.1 | 8.7 | 2.7 | 0.54 | 7 | 12.2 | 1.4 | 22.3 |