WLRA148

Lucerne on an alluvial plain		Site Code	WLRA148	Calcic, Mottled-Subnatric, Grey Sodosol
		Location	Landsborough Road, Joel, western Victoria
		Landform	Alluvial plain
		Geology	Quaternary recent alluvium: fluvial gravel, sand, silt
		Element	Plain
		Slope	<1%
		Aspect	East
Horizon	Depth (cm)	Description
A1	0–15	Brown (10YR5/3); sandy loam; strong fine subangular blocky, parting to fine to very fine granular structure; rough-ped fabric; weak dry consistence; common medium to coarse and fine to very fine roots; slightly water repellent; pH 6.0; abrupt and smooth boundary to:
A2	15–45	Light brownish grey (10YR6/2); conspicuously bleached very pale brown (10YR8/2); silty loam; massive (structureless); firm dry consistence; common medium to coarse roots, few fine to very fine roots; pH 7.0; abrupt and irregular boundary to:
B21	45–70	Dark greyish brown (10YR4/2) with many medium distinct (5YR4/6) mottles; medium heavy clay; strong medium prismatic, parting to fine subangular blocky structure; smooth and rough ped-fabric; very strong dry consistence; few distinct mangans; common medium to coarse and common fine to very fine roots; pH 7.5; clear and smooth boundary to:
B22	70–110	Yellowish brown (10YR5/8); light clay; massive (structureless); very firm dry consistence; few medium to coarse calcareous nodules and soft segregation patches; common medium to coarse and few fine to very fine roots; pH 9.0; gradual and smooth boundary to:
B3	110–140+	Yellowish brown (10YR5/6); silty clay loam; massive (structureless); very firm dry consistence; few medium to coarse calcareous nodules and soft segregation patches; common medium to coarse and few fine to very fine roots; pH 9.0.

Management considerations
Texture contrast profile, occasionally gradational; sodic subsoil Subsurface horizon is leached (bleached). Fewer nutrients available Slightly acidic surface and subsurface soil and alkaline subsoil Note high fine sand content throughout Less clay with deeper subsoil and higher proportion of magnesium to calcium at depth Red mottling of upper subsoil; some minor drainage restrictions. Carbonate at depth. Subsoil is highly dispersive. Limited (preferably no) exposure required to remain stable. Slight salinity potential at depth. Surface and subsurface soil is only slightly dispersive Landscape position, alluvial plain. Water shedding potential is low

Site WLRA148	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	0–15	5.6	5	0.11	NA	4.4	1	0.93	0.09	<10	NA	29.8	6.9	2.6	56.2	12.5	27.5
A2	15–45	5.8	5.2	0.05	NA	1.4	0.79	0.09	0.16	<10	NA	18.8	3.7	2	63	13	17.5
B21	45–70	7.8	7	0.18	NA	3.7	6.4	0.82	1.8	NA	NA	27.6	14.4	0.4	36.9	22	35.5
B22	70–110	8.8	8.2	0.25	NA	2	5.1	0.46	1.6	NA	NA	NA	NA	NA	NA	NA	NA
B3	110–140+	8.7	8.2	0.4	0.08	1.4	5.4	0.5	1.2	NA	NA	24.7	7.4	0.2	69.6	11.5	15.5

Note: NA=not assessed

Page top