Group: Birchip Cropping Group. | Location: Curyo. |
Australian Soil Classification: Hypercalcic, Mesonatric, Red SODOSOL. | |
General Landscape Description: Low rise (possibly a lunette) on a plain within the Culgoa Land System (Rowan and Downes, 1963). |
A1 | 0-10 cm | Dark brown (7.5YR4/4); light sandy clay loam; massive and hardsetting; firm consistence dry; pH 8.6; sharp change to: | Site MP26 Profile |
A2 | 10-20 cm | Brown (7.5YR4/6); light sandy loam; massive; weak to firm consistence dry; thin bleached layer occurs at the interface with the subsoil; pH 8.4; sharp change to: | |
Subsoil | |||
B21 | 20-40 cm | Yellowish red (5YR5/8); light medium clay (sandy); moderate coarse to very coarse prismatic structure; pH 9.6: | |
B22 | 40-60 cm | Reddish yellow (5YR6/8); medium clay; moderate coarse prismatic structure; very firm consistence dry; pH 8.9; gradual change to: | |
B23k | 60-160 cm | Reddish yellow (7.5YR6/6); light medium clay; moderate medium prismatic structure; strong consistence dry; contains many (20-30%) fine earth carbonate segregations, hard carbonate nodules and some ironstone fragments common (10-20%); pH 9.8; gradual change to: | |
B31 | 160 cm+ | Reddish yellow (7.5YR6/6); medium heavy clay; strong medium prismatic structure (smooth-faced peds); strong consistence dry; contains a zone of soft manganese segregations at 160-165 cm; pH 6.8. |
pH | Salinity Rating | |||
Surface (A1 horizon) | strongly alkaline | very low | non-sodic | none |
Subsoil (B21 horizon) | extremely alkaline | low | strongly sodic | strong |
Deeper subsoil (at 1 m) | extremely alkaline | medium-high | very strongly sodic | slight-moderate |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | 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 | 8.6 | 7.9 | 0.09 | 14.6 | 2.7 | 1.9 | 0.3 | 23 | 8 | 36 | 31 | 4 | 23 | |
A2 | 10-20 | 8.4 | 7.9 | <0.05 | 5.9 | 1.2 | 0.2 | 0.5 | 15 | 3 | |||||
B21 | 20-40 | 9.6 | 8.6 | 0.34 | <0.05 | 5.8 | 10.3 | 0.8 | 5.2 | 37 | 16 | 32 | 26 | 2 | 36 |
B22 | 40-60 | 8.9 | 7.6 | 0.08 | 6.8 | 5.4 | 0.5 | 2.2 | 28 | 12 | |||||
B23k | 60-160 | 9.8 | 8.9 | 0.92 | 0.12 | 2.6 | 8 | 0.9 | 9.1 | 38 | 16 | ||||
B31 | 160+ | 6.8 | 6.4 | 1.38 | 0.25 | 3.4 | 8.7 | 0.8 | 5.7 |