Agency Code: 501 Project Code: NYA Site Code: 0058
Described by: Heather Percy Date: 16/05/1995

Observation type: auger boring Category: full description
Lab Analyses: Limited chemical and physical analyses.

Location: MGA94 Zone: 50  602991 mE  6277468 mN Elevation (m): 330  Map sheet:  Nyabing 100K
Location notes: Wallacup Road reserve.
Site notes: 
Disturbance: Complete clearing; past cultivation.

Landform
Landform pattern: rises	Slope:  2 %
Relief/modal slope: gently undulating rises
Landform element: hillslope
Morphological type: mid-slope	Slope curvature: convex slope
Pattern Relief:  rises	Microrelief: 15 m

Surface and Hydrological Properties
Rock outcrop: 0 %  
Surface coarse fragments: few angular gravel sized quartz; no stones and boulder sized
Physical properties: Hardsetting; ; cracking; ; moderate profile permeability; deep soil

Geology/parent material
Soil parent material: dolerite
Possibly formed on weathered dolerite; regional geology mapped as colluvium and minor alluvium (Qc)
Geology: unconsolidated material (unidentified)

Vegetation
Type:  grassland; Surrounded by:  grassland
Notes: Range of grass species.

Land use
Site: Not used. Surrounds: Cropping (may include grazing in rotation).

Visible erosion, assessed flooding and salinity
no flooding, no ponding, no salinity.

Current Classification
WA Soil Group: (1999) Hard cracking clay, grey
Australian Soil Classification: (2002) Episodic-Endocalcareous Epipedal Grey Vertosol
ASC confidence: very high
Soil Series: Beynon (provisional)
Map Unit: 250Ny_3

Other Classifications
Northcote PPF: Ug5.28

Soil Profile Description

Horizon | Depth (cm) | Description
A1 | 0-10 | Dark grey (7.5YR 4/1 moist) light medium clay; no mottles; weak moderately moist consistence; rough-ped fabric; pedal, moderate, 20-50 mm, subangular blocky structure; many distinct other cutans Organic and  slickensides; no segregations segregations; no coarse fragments; moderate permeability, slow dispersion, slow slaking, non-calcareous; many fine roots; pH 8 (Raupach and Tucker); abrupt, smooth boundary.
B1 | 10-30 | Light brownish grey (2.5Y 6/2 moist) medium clay; no mottles; strong dry consistence; smooth-ped fabric; pedal, strong, 20-50 mm, polyhedral structure; no segregations segregations; 5% angular quartz fine gravel sized coarse fragments; moderate permeability, slow dispersion, slow slaking, non-calcareous; many fine roots; pH 9.5 (Raupach and Tucker); gradual boundary.
B2 | 30-45 | Grey (2.5Y 5/1 moist) medium heavy clay; few medium faint very dark grey (2.5Y 3/1 moist)  redox mottles; strong dry consistence; smooth-ped fabric; pedal, strong structure; few faint slickensides organic; no segregations segregations; no coarse fragments; moderate permeability, slow dispersion, slow slaking, non-calcareous; common fine roots; pH 9.5 (Raupach and Tucker); gradual boundary.
B3 | 45-75 | Grey (2.5Y 5/1 moist) medium clay; many coarse distinct very dark grey (2.5Y 3/1 moist)  redox mottles; very firm dry consistence; smooth-ped fabric; pedal, strong structure; no segregations segregations; no coarse fragments; moderate permeability, slow dispersion, rapid slaking, slightly calcareous; common fine roots; pH 9.5 (Raupach and Tucker); diffuse boundary.
C | 75-100+ | Grey (2.5Y 5/1 moist) light medium clay; common medium faint grey (2.5Y 5/1 moist)  redox mottles; firm dry consistence; smooth-ped fabric; pedal, strong structure; no segregations segregations; no coarse fragments; moderate permeability, slow dispersion, rapid slaking, slightly calcareous; pH 9.5 (Raupach and Tucker); notes: Below 90cm becomes less mottled..

Lab Results (501 NYA 0058)

Basic Chemistry

Sample | Horizon | Match | Depth | pH_w | pH_CaCl2 | EC
A | 1 | A | 0-10 | 7.5 | 6.6 | 17

Exchangeable Cations

Sample | Horizon | Match | Depth | CEC | Exch_Ca | Exch_Na | Exch_K | Exch_Mg | Sum_Exch | ESP | CaMgR_Exch | Exch_cats% | Base_stat
A | 1 | A | 0-10 | 16 (1) | 6.39 (1) | 1.37 (1) | 0.54 (1) | 8.89 (1) | 17.19 (1) | 9 (2) | 0.72 (1) | 107 (2) | 39.98 (2)

Particle Size Analysis

Sample | Horizon | Match | Depth | gt2mm | sand | silt | clay
A | 1 | A | 0-10 | 0.73 | 52 | 5 | 43