Victorian Resources Online (archived)

WLRA130

		Site Code	WLRA130	Epihypersodic, Regolithic, Hypercalcic Calcarosol
		Location	Jeparit Road, Peppers Plains, western Victoria
		Landform	Undulating plain
		Geology	Quaternary Woorinen Formation: aeolian dune sand, calcareous clay
		Element	Lower slope
		Slope	0–1%
		Aspect	North-west


Horizon	Depth (cm)	Description
A1	0–5	Dark brown (10YR4/3); sandy clay loam; massive (structureless); earthy fabric; weak consistence dry; contains a few medium and fine calcareous nodules; highly calcareous; field pH 9.0; smooth and sharp change to:
B21	5–25	Dark greyish brown (10YR4/2); light clay, fine sandy; very coarse weak columnar structure; rough ped fabric; very firm consistence dry; contains very few fine calcareous nodules and fragments, very few fine gypseous nodules and very few fine argillaceous tubules; moderately cemented cultivation pan evident; highly calcareous; field pH 9.0; gradual and smooth change to:
B22	25–50	Yellowish brown (10YR5/4) with many medium faint greyish brown mottles; light clay, fine sandy; massive (structureless); earthy fabric; weak consistence, moderately moist; very few fine calcareous nodules and fragments and very few fine argillaceous tubules; highly calcareous; field pH 9.0; diffuse and smooth change to:
B23k	50–100	Reddish yellow (7.5YR7/6); light clay; massive (structureless); earthy fabric; weak consistence, moderately moist; contains very many extremely coarse calcareous soft segregations and very few medium argillaceous tubules; very highly calcareous; field pH 9.5; gradual and wavy change to:
2B21	100–145	Yellowish red (5YR5/6) with many very coarse distinct greyish brown mottles; heavy clay; weak medium to coarse polyhedral structure; rough ped fabric; weak consistence, moderately moist; contains a few fine manganese flecks and a few extremely coarse calcareous nodules; highly calcareous; field pH 9.5; gradual and smooth change to:
2B22	145–180+	Yellowish brown (10YR5/4) with many very coarse distinct yellowish red mottles; light medium clay; coarse to very coarse strong lenticular structure; smooth ped fabric; weak consistence, moist; contains a few fine manganese flecks and very few extremely coarse calcareous nodules; highly calcareous; field pH 9.5.
Management Considerations
High susceptibility to wind erosion. Alkaline subsoils with calcareous soft segregations, manganese flecks and argillaceous (clayey) tubules. Minor subsoil constraint >50 cm as mottling indicates slightly imperfect drainage. Possible plough pan (5-25 cm). Massive surface structure with weak resistance to breaking down makes it vulnerable to wind erosion without stubble and trash retention. Medium to very fine roots observed to 50 cm. Possible slight to moderate soil structure decline susceptibility due to poorer structure and dispersibility in the subsoil.

Horizon	Depth (cm)	pH (water)	pH (CaCl₂)	EC dS/m	Exchangeable Cations cmol-/kg
Horizon	Depth (cm)	pH (water)	pH (CaCl₂)	EC dS/m	Ca	Mg	K	Na
A1	0-5	8.4	8.2	2.3	12	3.3	1.4	3.1
B21	5-25	8.7	8.4	2.8	13	6	1.2	5.9
B22	25-50	8.9	8.7	1.9	8.6	7.5	0.7	5.3
B23K	50-100	9.5	8.9	1.5	3.4	9.9	1.2	6.2
2B21	100-145	9.4	8.8	1.6	3.2	14	2	11
2B22	145-180+	9.4	9	1.5	2.2	13	1.9	10

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