WLRA144

Level plain, strong texture contrast soil		Site Code	WLRA144	Vertic, Subnatric, Brown Sodosol
		Location	Six Mile Creek, Joel South, western Victoria
		Landform	Level plain
		Geology	Quaternary recent alluvium: fluvial gravel, sand, silt
		Element	Plain
		Slope	1%
		Aspect	West
Horizon	Depth (cm)	Description
A1	0–10	Dark greyish brown (10YR4/2); sandy clay loam; weak very fine subangular blocky structure; rough ped-fabric; weak dry consistence; water repellent; pH 5.5; abrupt and smooth boundary to:
A2	10–50	Conspicuously bleached pale brown; common medium to coarse ferruginous nodules; clear and irregular boundary to:
B1	10–30	Strong brown (7.5YR4/6) light clay with very few fine faint pale brown mottles; weak fine subangular blocky structure; rough ped-fabric; firm dry consistence; pH 5.75; clear and irregular boundary to:
B21	30/50–60	Yellowish brown (10YR5/6) with few fine distinct orange and pale brown mottles; heavy clay; moderate fine angular blocky structure; smooth ped-fabric; strong moderately moist consistence; pH 7.0; gradual and smooth boundary to:
B22	60–105	Light olive brown (2.5Y5/4); heavy clay; weak coarse subangular blocky structure; rough ped-fabric; strong moderately moist consistence; few fine to coarse calcareous nodules and soft segregation patches, very few fine manganiferous fragments and nodules; pH 7.5; diffuse and smooth boundary to:
B23	105–140+	Brownish yellow (10YR6/6); medium clay; weak medium subangular blocky structure; rough ped-fabric; strong moderately moist consistence; few coarse to very coarse calcareous soft segregation patches; pH 8.75.
Management considerations
Strong texture contrast profile, slightly sodic subsoil, possible uniform clay soil (vertosol) in association Intermittent deeper subsurface horizon is leached (bleached) with restrictive interface with subsoil (Note less clay than above and below). Few nutrients available Local soil variation; gilgai with intermittent bleached horizon. Rooting depth is variable Strongly acidic surface and subsurface soil, acidic upper subsoil and alkaline deeper subsoil Clay percentage decreasing at depth. Carbonate at depth Deep subsoil is highly to very highly dispersive. Limited (preferably no) exposure necessary to remain stable. May be slightly saline with depth. Surface soil is only slightly dispersive Landscape position (ie. plain). Limited site drainage

Site WLRA144	Sample depth cm	pH		EC dS/m	NaCl %	Ex Ca cmol-/kg	Ex Mg cmol-/kg	Ex K cmol-/kg	Ex Na cmol-/kg	Ex Al mg/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 %	Ex Ca cmol-/kg	Ex Mg cmol-/kg	Ex K cmol-/kg	Ex Na cmol-/kg	Ex Al mg/kg	Ex acidity cmol-/kg	FC -30^okPa	PWP -1500^okPa	KS %	FS %	Z %	C %
A1	0–10	5	4.4	0.12	NA	2.9	1.1	0.47	0.15	30	NA	27.4	8.9	9.4	50.4	6.5	31
A2	10–50	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
B1	10–30	5.3	4.6	0.1	NA	3.6	4.5	0.49	0.37	36	NA	34.9	16.5	4.2	36.8	8	46.5
B21	30/50–60	5.8	5	0.13	NA	5.4	9.7	0.64	1.1	16	NA	41.1	24.7	2.2	21.3	12	59
B22	60–105	7.8	6.9	0.14	NA	6.5	12	0.58	2	NA	NA	37	21	1.1	25.4	20	50.5
B23	105–140+	8.6	8.1	0.3	<0.01	7.7	13	0.6	2.6	NA	NA	34.2	20.1	1.4	33.1	15.5	45.5

Note: NA=not assessed

Page top