ALRA66

Colluvial slopes leading to Mt William Creek		Site Code	ALRA66	Parapanic, Humosesquic, Aeric Podosol
		Location	Long Gully Road, Pomonal
		Landform	Scarp-footslope
		Geology	Grampians colluvium
		Element	Hillslope
		Slope	5%
		Aspect	North
Horizon	Depth (cm)	Description
A11	0–10	Very dark grey (7.5YR2.5/1); loamy sand; massive (structureless); very weak consistence when moderately moist; many fine roots; pH 5.5; clear and wavy boundary to:
A12	10–30	Dark greyish brown (7.5YR4/1); loamy sand; massive (structureless); very weak consistence when dry; common very fine roots; pH 5.0; clear and smooth boundary to:
A2	30–55	Pinkish grey (7.5YR6/2); sporadically bleached (7.5YR7/1 dry); loamy sand; massive (structureless); very weak consistence when dry; common very fine roots; pH 5.5; abrupt and tongued boundary to:
Bhs	55–95	Olive yellow (2.5Y6/6); "coffee rock layer"; massive (structureless); very firm consistence when dry; moderately cemented discontinuous massive orstein pan; common very fine roots; pH 6.0; clear and wavy boundary to:
B2	95–120+	Light brownish grey (10YR6/2) with many very coarse prominent brownish yellow mottles; medium clay; massive (structureless); very firm consistence when dry; common prominent slickensides; common very fine roots; pH 6.5.
Management considerations
A horizon has been leached, particularly subsurface soil High permeability and water drainage capacity through the A horizon Coffee rock formed at the boundary of the A and B horizons from the accumulated deposits of organic matter and sesquioxides Many fine roots are observed to the top of the B horizon where the orstein pan "coffee rock" provides an impediment to root growth (especially perennial and annual grasses) Old former tree roots penetrating the B horizon give effect of horizon tonguing Lateral flow of water along the top of the B horizon is evident Strongly acidic profile, low nutrient statuswith a low base nutrient status

Site ALRA66	Sample depth cm	pH		EC dS/m	NaCl %	Organic Carbon %	Ex Ca cmol-/kg	Ex Mg cmol-/kg	Ex K cmol-/kg	Ex Na cmol-/kg	Ex Al cmol-/kg	Ex acidity cmol-/kg	FC -30^okPa	PWP -1500^okPa	KS %	FS %	Z %	C %
Horizon	Sample depth cm	H₂O	CaCl₂	EC dS/m	NaCl %	Organic Carbon %	Ex Ca cmol-/kg	Ex Mg cmol-/kg	Ex K cmol-/kg	Ex Na cmol-/kg	Ex Al cmol-/kg	Ex acidity cmol-/kg	FC -30^okPa	PWP -1500^okPa	KS %	FS %	Z %	C %
A11	0-10	5.5	4.9	0.05	NA	3.5	5.3	0.75	0.22	0.1	<10	7.1	4.5	5.7	44.3	43.6	5.0	1.5
A12	10-30	4.3	3.9	<0.05	NA	0.99	0.48	0.07	0.07	<0.05	33	3.7	4.3	1.1	45.2	46.8	4.0	2.5
A2	30-55	4.3	4	<0.05	NA	NA	0.19	<0.05	0.05	<0.05	19	1.6	7.4	0.7	45.2	47	5.5	2.5
Bhs	55-95	5.6	5.2	<0.05	NA	NA	0.55	0.12	0.06	0.07	19	8.5	21.3	2.4	37.1	49.1	6.5	2.5
B2	95-120+	5.3	4.5	<0.05	NA	NA	0.8	3.4	0.44	0.12	150	NA	22.1	12.1	25.1	37.7	5.0	31.5

Note: NA=not assessed

Site ALRA66	Sample depth cm	pH		EC dS/m	TSS %	P (Olsen) (mg/kg)	Total N &	Organic Carbon %	Organic matter %
Horizon		H₂O	CaCl₂
Bulk sample	0–10	5.3	4.7	0.05	0.02	29	0.16	3.1	5.9

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