Murrungowar (Symbol: Mg)

Site 212 (Rees unpublished) | Site 215 (Rees unpublished)

Geology
Palaeozoic granites.

Landform
Rolling low hills. Elevation range in this report is 20 – 200 m, with slope gradients generally less than 20%.

Land use
Forestry, grazing, minor granite extraction (Orbost).

Native vegetation
Lowland forest and shrubby dry forest.

Soils
This map unit is of limited occurrence. In the context of this report it occurs around Orbost and Wangarabell. No pits or analyses were carried out on this soil.

Site 212 (Rees unpublished)

Location: About 24 km NNE of Orbost on the Bonang Highway	Geo. Ref. 0633600E 5836400N
Australian Soil Classification: Bleached-mottled, Eutrophic, Brown CHROMOSOL	Yellow texture contrast soil
General landscape description: Rolling low hills
Geology: Granite
Site description: Lower slope of a low hill, NW aspect 20% slope
Land use: Native forest
Native vegetation: Lowland forest
Mapping unit: Murrungowar

Soil profile morphology

Surface soil

Road cutting near Wangarabell. Geo. Ref.: 721500E 5859000N

0 – 6 cm

Brown (10YR4/3); light sandy loam; weak structure; clear change to:

6 – 45 cm

Light yellowish brown (2.5Y 6/4), conspicuously bleached (2.5Y8/2); loamy sand; massive abrupt change to:

Subsoil

45 – 70 cm

Light olive brown (2.5Y5/4), many orange and light grey mottles; gritty medium clay; moderate angular blocky structure; gravelly, clear boundary to:

70 – 1.4m

Weathered granite becoming hard rock.

Soil profile characteristics

Horizon	Depth	EC	pH water	pH CaCl₂	Exchangeable cations meq/100 g							Ca:Mg	ESP
	cm	dS/m			Ca	Mg	K	Na	Total	H	CEC
A1	0-6	<0.05	5.6	4.3	88	0.1	0.81	0.10	0.20	1.2	5.3	6.5	3
B2	45-70	<0.05	5.9	4.3	118	0.21	8.61	0.21	0.52	9.6	9.0	18.6	3

Sampled by auger

Site 215 (Rees unpublished)

Location: Tongi Creek	Geo. Ref. 682900E 5841900N
Australian Soil Classification: Bleached-Mottled, Eutrophic, Brown CHROMOSOL	Acidic brown texture contrast soil
General landscape description: Low hills
Geology: Granite
Site description: Upper slope
Land use: Forestry
Native vegetation: Lowland forest
Mapping unit: Murrungowar

Soil profile morphology

Surface soil
A1	0 – 40 cm	Dark gray (10YR4/1); sandy loam, weak to moderate subangular blocky structure; firm consistence dry, common subangular gravel; clear change to:
A2	40 – 80 cm	Brown (10YR5/3), conspicuously bleached (10YR7/2d); gravelly sandy loam; massive; weak consistence, very few ferruginous segregations; many subangular granitic gravel; clear change to:
Subsoil
B2	80 – 120 cm	Brown (10YR5/3), distinct to prominent yellow, red and grey mottles; sandy clay, moderate subangular blocky structure; very firm consistence, common subangular; gradual change to:
C	1.2 – 1.6+m	Weathered parent material

Soil profile characteristics

Horiz	Depth	EC	pH H₂O	pH CaCl₂	Org C %	Total N %	Exch Al ppm	Exchangeable cations cmol(+)/kg							Ca:Mg	ESP
	cm	dS/m			Org C %	Total N %	Exch Al ppm	Ca	Mg	K	Na	Total	H	CEC
A1	0-40	<0.05	5.5	4.5	1.13	<0.01	57	0.91	0.81	0.20	0.10	2.0	7.7	9.7	1.1	1
A2	40-80	<0.05	6.0	4.8	0.35	<0.01	25	0.50	0.50	0.10	0.10	1.2	3.5	4.7	1.0	2
B2	80-120	<0.05	5.8	4.4	0.27	<0.01	145	2.17	5.68	0.21	0.62	8.7	8.3	17.0	0.4	4

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