Property: Rutherglen Research Institute.
Paddock Number: PTD 2 (native grass).
Australian Soil Classification: Endohypersodic, Epipedal, Yellow VERTOSOL.
Northcote Factual Key: Ug 5.35.
Great Soil Group: Brown Clay.
General Landscape Description: This soil type resembles Type D which occurs on the puff component of gilgai microrelief. Red grass (Bothriochloa macra) commonly grows on the puff bank component of gilgai microrelief.
Soil Mapping Unit: Unit 2.
Site NE37b Landscape |
Soil Profile Morphology: | |||
Surface Soil | |||
A1 | 0-10 cm | Brown (10YR4/3); light clay; rusty root channel mottling present; moderate medium polyhedral structure; contains very few (< 2%) manganese nodules (5-10 mm size); pH 5.9: | Site NE37b Profile |
Subsoil | |||
B21 | 10-25 cm | Brownish yellow (10YR6/6) with strong brown (7.5YR5/8) diffuse mottles; light medium clay; moderate medium polyhedral, parting to strong fine polyhedral structure; contains very few (1-2 %) ferromanganiferous nodules (2-5 mm size) [with many (up to 25%) ferromanganiferous and manganiferous nodules and a trace (< 2%) amount of quartz (2-4 mm size) gravel on the flanks of the puffs]; pH 6.3; clear change to: | |
B22 | 25-90 cm | Light brown (10YR6/3) with reddish yellow (10YR7/6) and dark red (2.5YR4/8) mottles; medium clay; moderate very coarse prismatic, parting to moderate coarse blocky structure; contains very few (2 %) ferromanganiferous nodules (2-4 mm size); pH 6.3; wavy change to: | |
B23 | 90-120 cm | Light brownish grey (10YR6/2) with brownish yellow (10YR6/8) mottles; heavy clay; rigid consistence dry; contains a few (5-10 %) manganese stains and very few (2 %) ferromanganiferous nodules; pH 7.9: | |
B24 | 120 cm+ | Greyish brown (10YR5/2); heavy clay. |
The surface horizon is moderately acid. The upper subsoil is slightly acid and the deeper subsoil becomes alkaline. | The surface soil is non-sodic. The upper subsoil is sodic and the deep subsoil is strongly sodic. | ||
Soluble salt levels are very low in the top metre of the soil profile. Levels become low at depths greater than 1 metre. | The clay content is high in the surface soil and increases 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 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 | 5.9 | 4.8 | <0.05 | 4.7 | 3.3 | 0.83 | 0.3 | 56 | 28 | 12 | 9 | 37 | 17 | 35 |
B21 | 10-25 | 6.3 | 4.9 | <0.05 | 8.1 | 7.2 | 0.72 | 1.1 | 35 | 21 | 5 | 20 | 11 | 65 | |
B22 | 25-90 | 6.3 | 4.7 | 0.05 | 7.4 | 8.5 | 0.52 | 1.8 | 38 | 24 | 4 | 17 | 10 | 70 | |
B23 | 90-120 | 7.9 | 6.8 | 0.3 | 8.4 | 12 | 0.3 | 4 |