WIA5

Cropped plains near Coromby		Site Code	WIA5	Endocalcareous-Endohypersodic, Self-mulching, Red Vertosol
		Location	Coromby, western Victoria
		Landform	Plain
		Geology	Pliocene Parilla Sand: marine sand and silt
		Element	Plain
		Slope	0-1%

Horizon	Depth (cm)	Description
A1	0–10	Brown (10YR4/3); light clay; subplastic; cracking and self-mulching surface condition; weak coarse granular structure; weak consistence dry; pH 8.8; sharp and smooth boundary to:
B21	10–30	Reddish brown (5YR4/4); medium clay; plastic; strong very coarse prismatic structure; very strong consistence dry; sticky consistence wet; pH 9.1; clear and smooth boundary to:
B22k	30–65	Yellowish red (5YR4/5) with fine faint (7.5YR6/6) mottles; light clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; sticky consistence wet; few (2-10%) soft carbonate segregations; pH 9.3.
B23k	65–100	Yellowish red (5YR4/5) with faint (7.5YR6/6) mottles; heavy clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; sticky consistence wet; few (2-10 %) soft carbonate segregations; pH 9.1.
B24k	100–145	Yellowish red (5YR4/5) with fine faint (7.5YR6/6) mottles; heavy clay; subplastic; weak coarse subangular blocky structure; strong consistence dry; sticky consistence wet; few (2-10%) soft carbonate segregations; pH 8.9; gradual boundary to:
B31	145–180	Brown (7.5YR5/5); medium clay; weak coarse subangular blocky structure; pH 8.9; gradual boundary to:
B32	180–215	Strong brown (7.5YR5/6) with (10YR6/3) mottles; medium clay; weak coarse subangular blocky structure; pH 8.9.
Management considerations
Uniform cracking clay soil. Strongly alkaline soil. Self-mulching surface, friable. Subplastic (feels lighter than lab tests suggest). Red upper subsoil, indicating oxidation and little restriction to water and gas movement, despite clay content. Strongly calcareous in surface and upper subsoil, decreasing with depth. Subsoil sodic, becoming strongly sodic with depth. Magnesium also increases with depth. High salt content below 65 cm.

Site WIA5	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	8.8	NA	0.18	0.01	19.5	4	2.1	1	NA	1.2	25.8	14.7	25	22	8	44
B21	10–30	9.1	NA	0.22	0.03	15.6	9.7	1.8	4.7	NA	NA	NA	24.9	19	18	5	57
B22k	30–65	9.3	NA	0.75	0.07	10.2	13.8	1.9	8.8	NA	NA	NA	33.3	18	15	3	57
B23k	65–100	9.1	NA	1.6	0.17	6.9	12.9	2	12.7	NA	NA	NA	26.2	13	14	8	58
B24k	100–145	8.9	NA	2	0.24	7.5	15.9	2.2	14.1	NA	NA	NA	27.1	10	9	7	58
B31	145–180	8.9	NA	2.01	0.27	NA	NA	NA	NA	NA	NA	NA	NA	12	15	8	65
B32	180–215	8.9	NA	2	0.31	NA	NA	NA	NA	NA	NA	NA	NA	9	11	8	59

Note: NA=not assessed

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