Australian Soil Classification: Endocalcareous, Self-Mulching, Black VERTOSOL
General Landscape Description: Low rise on an undulating plain.
Site Description: Southern edge of Gnarwarre Farming Systems trial site raised bed cropping.
Geology: Quaternary Basalt - Newer Volcanics
Map Unit: Gnarwarre A soil (Adcock, 1998).
SFS2 Landscape. Also shows the Map Units within the Gnarwarre SFS trial site.
Soil Profile Morphology:
|Ap||0-20cm||Black (10YR2/1); self-mulching and cracking surface condition; light medium clay; strongly pedal; pH 6.0; clear change to:|
|B21g||20-50/70 cm||Black (10YR2/1) with abundant coarse dark greyish brown (2.5Y4/2) mottles as well as few fine to medium dark red (2.5YR4/8) and strong brown (7.5YR5/8) mottles; heavy clay; strong angular blocky and lenticular structure, parting to coarse polyhedral, parting to fine polyhedral structure; medium macropores common; shiny faced peds; pH 7.4; clear and wavy boundary to:|
|B22gss||50/70 –90 cm||Black (10YR2/1) with many coarse dark greyish brown (2.5Y4/2) mottles (increasing with size and abundance with depth); heavy clay; prominent slickensides; medium macropores common; pH 8.2; clear boundary to:|
|B23k||90+cm||Abundant calcium carbonate; highly calcareous; rounded dense basalt floaters; Field pH 9.5/10.|
|The pH in the surface is moderately acid. The pH in the subsoil is slightly alkaline becoming moderately alkaline with depth.||The salinity rating is low throughout the profile.||The clay content is moderate throughout the profile.|
Oxidisable Organic Carbon