Australian Soil Classification: Vertic (& Calcic), Mottled-Mesonatric, SODOSOL
General Landscape Description: Gently undulating coastal plain with very low relief.
Site Description: Simple slope (1-2%) with southerly aspect.
Land Use: Pasture / crop rotations. Southern Farming Systems (SFS) trial site.
Geology: Neogene sediments (Hanson Plain Sand).
Soil Profile Morphology:
|Ap||0-10 cm||Dark brown (10YR3/3); loamy sand; apedal structure; loose with some weak fragments; pH 6.0; abrupt change to:|
|A2(e)||10-20/35 cm||Dark yellowish brown (10YR4/4), pale brown (10YR6/3 dry) and light yellowish brown (10YR6/4) conspicuously bleached (10YR7/3 dry) ; sandy loam; few coarse buckshot/ferruginous gravel in thicker zones of A2; apedal structure; firm consistence dry; pH 5.7; sharp and wavy change to:|
NOTE: Horizon is of variable thickness. It is more bleached where it is thicker and closer to the A2/B21 boundary.
|B21t||20/35-65 cm||Brown (10YR4/3) ped faces with yellowish brown (10YR5/6) matrix with dark yellowish brown (10YR4/6) mottles; medium clay; coarse prismatic (some peds tending to have domed tops), parting to coarse (20 mm) angular blocky, polyhedral as well as lenticular structure; smooth faced peds; pH 7.2; gradual or diffuse change to:|
|B22t||65-95 cm||Dark yellowish brown (10YR4/6) matrix and yellowish red (5YR4/6) ped surfaces; medium clay; angular blocky and lenticular structure; many vertic features; pH 8.7; clear change to:|
|B23ss||95-120+ cm||Strong brown (7.5YR5/8) matrix with yellowish red (5YR4/6) ped surfaces/infill; light clay; contains soft yellow (10YR7/6) calcium carbonate; visible effervescence; pH 9.3.|
NOTE: Thick vertical lenticular peds in the subsoil.
Part of a lenticular ped found within the subsoil.
A fragment from the deeper subsoil B23k, note the calcium carbonate.
(at 95-120 cm)
Very Strongly Alkaline
|The pH in the surface is moderately acid. The pH in the upper subsoil is near neutral becoming very strongly alkaline with depth.||
||The surface is non sodic. The subsoil is strongly sodic.||The clay content in the surface is low and sharply increases at the surface / subsoil interface.|
Oxidisable Organic Carbon