Your gateway to a wide range of natural resources information and associated maps

Victorian Resources Online

Site GN9

Location: Dookie
Australian Soil Classification: Haplic, Eutrophic, Red CHROMOSOL (thin gravelly surface; moderately deep profile).
General Landscape Description: Mid slope of hill (2-3 degrees slope) with a NW aspect.Soil Mapping Unit: Skeletal Soils (Downes 1949).
Soil Management Unit (Briggs 1995): 'Rocky Grazing Country'.Occurrence: Found on higher slopes and hill tops where topography and rocks limit cropping practices.
Site Description: Grazing paddock.
Native Vegetation: Yellow box (Eucalyptus melliodora) are predominantly found in this soil. Found downslope are White cypress pine/Murray pine (Callitris columellaris) and Sheoak (Allocasuarina stricta), while Grey box (Eucalyptus microcarpa) can be found on the heavier sites.

Photo: Site GN9 Landscape
Site GN9 Landscape


Soil Profile Morphology:

Surface Soil


A10-10 cmDark red (2.5YR3/6); heavy clay loam (fine sandy); hardsetting; moderate coarse polyhedral structure; very firm consistence (dry); few surface rocks (sandstone and quartz); pH 6.3; sharp change to:
Photo: Site GN9 Profile
Site GN9 Profile
Subsoil
B2110-50 cmDark red (2.5YR3/6); medium heavy clay; strong coarse to medium prismatic, parting to coarse blocky to fine blocky structure; strong consistence (dry); few (3%) coarse fragments of weathered parent rock (4 cm av. size); pH 6.8; sharp and wavy change to:

B2250-70 cmRed (2.5YR4/6); medium clay; firm consistence (moist); pH 7.6; many (20-25 %) coarse fragments of weathered parent rock (1 cm av. size); sharp and irregular change to:

C70+ cmWeathered rock with some clay veins.


Key Profile Features:
  • Strong texture contrast between surface (A1) and subsoil (B21) horizon
  • Identifying Characteristics - These soils generally have a rocky surface and are found on the hill tops and higher ground. Often too rocky to crop, they are suitable for grazing over wet winter months as they stay dry.

Soil Profile Characteristics:

pH
Salinity Rating
Surface soil
(A1 horizon)
Slightly Acid
Low
Non-Sodic
None
Upper subsoil
10 - 50 cm
Slightly Acid
Very Low
Non-Sodic
None
Deeper subsoil
(at 50 - 70 cm)
Slightly Alkaline
Very Low
Non-Sodic
None

Graph: Site GN9 pH levels
Graph: Site GN9 Salinity levels
Graph: Site GN9 Sodicity levels
Graph: Site GN9 Clay%

Horizon
Horizon
Depth

(cm)
pH
(water)
pH
(CaCl
2)
EC 1:5
Exchangeable Cations
Exch.
Al

mg/kg
Exch.
Acidity meq/100 g
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
(<0.00
2 mm)
Ca
Mg
K
Na
meq/100g
A1
0-10
6.3
5.7
0.14
8.5
6.6
1.4
<0.1
<10
2.7
28.3
17.3
13.4
27.9
13.5
39.0
B21
10-50
6.8
5.8
<0.05
9.3
11.9
0.5
0.1
<10
9.0
30.8
23.7
8.6
15.0
10.5
60.0
B22
50-70
7.9
6.6
<0.05
20.5
27.6
0.2
0.2
11
7.5


14.7
30.7
26.0
23.0
C
70+
















Management Considerations (Briggs 1995):

Favourable Characteristics
  • Drainage - The sloping topography and free-draining nature of the soil results in good drainage.
Limiting Features
  • Erosion - This soil has the potential to erode when there is insufficient ground cover and when the slope is quite steep.
  • Recharge Hazard - These soils are considered to be high recharge soils and high contributors to the groundwater levels lower in the landscape.
  • Workability/Trafficability - Cropping the rocky grazing country has proven difficult due to topography and rocky surfaces.
Cropping Considerations
  • This soil is not suited to cropping due to the topography and surface rock cover.

Pasture Considerations
  • The rocky grazing country provides good winter grazing, as generally the soils are drier than for the heavier soils. Pasture establishment is feasible by aerial sowing. This will provide ground cover and increase productivity of the area.
  • Current Possibilities - Phalaris (Australian Holdfast, Sirosa mix), cocksfoot (Porto), Trikkala, Goulburn, lucerne (depending on pH and terrain).

References:

Management Considerations based on booklet: ' Soil Management Units in the Dookie Land Management Group Area' - compiled by Suzanne Briggs. Agriculture Victoria,1995.

Downes R.G. (1949). 'Soil, Land-Use, and Erosion Survey around Dookie, Victoria' , Bulletin 243, CSIRO, Victoria.

Profile Described By: Mark Imhof, John Martin and Sonia Thompson (4/5/94).
Page top