Pendergast (Symbol: Pt)

EG108

Geology
Colluvium from Triassic granites, volcanic plugs and dykes.

Landform
Undulating to low hills. Slope gradients are generally less than 10% with a relief of 9 -30 m.

Soils and landforms of the Omeo/Benambra and Tambo Valley region - soil-landform unit Pendergast landform
Pendergast map unit: gentle cleared slopes in the right middle ground; Morass map unit: level plain in the foreground;
Macfarlane map unit: steep hills in the background.

Soils
These soils have mostly developed on colluvium derived from the granites. It is not possible to give a definite description of these soils as they vary from gravels overlying gravelly sands to clay loams overlying clays.

Land use
Most of the cleared land is used for grazing.

Site EG108

Location: Omeo south	Geo. Ref. 0557479E 5887924N
Australian soil classification: Eutrophic, Mottled-Subnatric, Brown SODOSOL	Sodic brown texture contrast soil
General landscape description: Undulating low hills
Geology: Palaeozoic granite
Site Description: Convex lower slope, 2 % slope to North
Land use: Grazing on annual pasture
Native vegetation: Montane grassy woodland
Mapping unit: Omeo (Component 1)

Soils and landforms of the Omeo/Benambra and Tambo Valley region - soil-landform unit Pendergast EG108 landscape

Insert on side Pendergast C3 profile on right hand side

Soils and landforms of the Omeo/Benambra and Tambo Valley region - soil-landform unit Pendergast soils

Photo: Gravelly colluvium overlying decomposing granite.

Soil profile morphology

Surface soil
A11	0 – 20 cm	Dark reddish grey (5YR4/2); sandy loam; moderate polyhedral structure; weak consistence moist; slight (2 – 10%) amounts of fine gravel (2 – 6 mm); gradual change to:
Subsoil
B1	20 – 40 cm	Reddish brown (5YR4/4), sandy clay loam; moderate prismatic structure; firm moderately moist; slight (2 – 10%) amounts of fine gravel (2 – 6 mm); gradual change to:
B2	40 – 70+ cm	Reddish brown (2.5YR4/4); sandy light clay ; moderate prismatic structure; firm moderately moist; moderate (20 – 50%) amounts of fine gravel (2 – 6 mm).
Key profile features The soil has reddish colours throughout, indicating excellent internal drainage.

Soil profile characteristics

Horizon	Depth cm	Field texture	pH water	pH CaCl₂	EC dS/m	Coarse sand %	Fine sand %	Silt %	Clay %	Field cap. % w/w	Wilt. point % w/w	PAW* water % w/w

B1	20-40	SL	6.3	5.6	0.05	29	34	19	18	24.2	7.2
B2	40-70	SLC	6.3	5.6	0.05	24	28	14	33	25.4	10.2

Depth	Org C#	Total N	Free Fe₂O₃ % w/w	Exch. Al	Exchangeable cations meq/100 g							Ca:Mg	Na %
cm	%	%		ppm	Ca	Mg	K	Na	Total	H	CEC

20-40					4.3	1.1	0.27	0.06	5.8	5.1	10.9	3.9
40-70					4.3	2.1	0.43	0.1	7.2	6.1	13.3	2.0

# Organic carbon

Comment

This soil is amongst the less gravelly soils on this map unit.

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