Property: Rutherglen Research Institute.
Paddock Number: 28
Australian Soil Classification: Bleached-Sodic, Eutrophic, Yellow DERMOSOL
Northcote Factual Key: Gn 4.6
Great Soil Group: No suitable group.
General Landscape Description: Higher area of plain.
Soil Mapping Unit: Rutherglen loam (brown phase).
Site NE39 Landscape |
A11 | 0-10 cm | Brown (10YR4/3); fine sandy clay loam; weak coarse blocky structure; weak consistence moist; pH 4.7; clear change to: | Site NE39 Profile |
A12 | 10-20 cm | Brown (7.5YR4/4); fine sandy clay loam; weak coarse blocky structure; contains a few (2-5%) manganese nodules (2-5 mm in size); pH 5.1; abrupt change to: | |
A2 | 20-35 cm | Very pale brown (10YR7/4) [with patches of yellow (10YR7/6)] conspicuously bleached (7.5YR8/2d); fine sandy clay loam; weak coarse blocky structure; very firm consistence dry; contains a few (5-10%) hard clay and ferromanganiferous nodules; pH 6.7; clear change to: | |
Subsoil | |||
B1 | 35-50 cm | Very pale brown (10YR7/4); fine sandy clay loam (becoming light clay with depth); weak coarse polyhedral structure; contains a few (2 - 5 %) hard clay and ferruginous nodules; pH 8.0; clear change to: | |
B21 | 50-70 cm | Brownish yellow (10YR6/6); medium clay; moderate coarse polyhedral structure; (manganese stains present); pH 8.0; gradual change to: | |
B22 | 70-90 cm | Very pale brown (10YR7/3) with brownish yellow (10YR6/6) mottles; medium clay; moderate coarse polyhedral, parting to moderate medium polyhedral structure; contains manganese stains; pH 8.0; clear change to: | |
B23 | 90-100 cm | Reddish yellow (7.5YR6/6); medium clay; moderate coarse polyhedral, parting to moderate medium polyhedral structure; contains very many (50%) manganese stains; pH 8.3; clear change to: | |
B3 | 100-160+ cm | Light yellowish brown (10YR6/4) with yellowish red (5YR5/8) mottles; light medium clay; moderate coarse polyhedral, parting to moderate medium polyhedral structure (shiny faced peds); firm consistence dry; pH 8.7. |
The surface (A1) horizons are very strongly acid to strongly acid. The subsurface (A2) horizon is slightly acid. The upper subsoil is moderately alkaline and the deeper subsoil becomes strongly alkaline. | The surface horizons are non-sodic. The upper subsoil is sodic and the deep subsoil is strongly sodic. Strong dispersion occurs in the B21(50-70 cm) and deeper horizons | ||
The level of soluble salts is very low throughout the soil profile. | The clay percentage increases gradually with depth in the upper subsoil. |
Horizon | Horizon Depth (cm) | pH (water) | pH (CaCl2) | EC 1:5 | Exchangeable Cations | Exchangeable Aluminium mg/kg | 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 | |||||||||||||||
A11 | 0-10 | 4.7 | 4.1 | 0.17 | 2.4 | 0.62 | 0.65 | 0.17 | 78 | 29 | 9 | 5 | 41 | 30 | 22 |
A12 | 10-20 | 5.1 | 4.3 | 0.08 | 3 | 0.62 | 0.37 | 0.14 | 37 | ||||||
A2 | 20-35 | 6.7 | 5.5 | <0.05 | 3.9 | 1.1 | 0.22 | 0.28 | 23 | 8 | 6 | 42 | 28 | 24 | |
B1 | 35-50 | 8 | 6.5 | <0.05 | 3.8 | 1.8 | 0.24 | 0.54 | 21 | 9 | 7 | 41 | 26 | 27 | |
B21 | 50-70 | 8 | 6.6 | 0.07 | 5.7 | 4.2 | 0.47 | 1.3 | 29 | 15 | 5 | 30 | 19 | 47 | |
B22 | 70-90 | 8 | 6.6 | 0.08 | 5.6 | 6.3 | 0.56 | 1.9 | 30 | 17 | |||||
B23 | 90-100 | 8.3 | 6.8 | 0.08 | 5.5 | 7.4 | 0.6 | 2.4 | |||||||
B3 | 100-160 | 8.7 | 7.2 | 0.11 | 6.2 | 9.8 | 0.71 | 3.4 |