LS26

Dune crest on a dunefield south of the Big Desert		Site Code	LS26	Calcic, Mottled-Subnatric, Yellow Sodosol
		Location	Yanac, western Victoria
		Landform	Dune
		Geology	Quaternary Woorinen Formation: aeolian dune sand, calcareous clay over Pliocene Parilla Sand: marine sand and silt
		Element	Dunecrest


Horizon	Depth (cm)	Description
A1	0–10	Light yellowish brown (10YR6/4); loamy sand; weakly structured; pH 7.7.
A2	10–15	Light yellowish brown (10YR6/4); conspicuously bleached fine sand; pH 8.6; sharp and wavy boundary to:
B21	15–30	Light yellowish brown (10YR6/4) with (10YR6/6) mottles; coarse sandy clay loam; weak to moderate coarse columnar structure with hard bleached capping; strong consistence (dry); pH 8.9; clear and wavy boundary to:
B22k	30–60	Light yellowish brown (10YR6/4) with (5YR5/6) mottles; light medium clay (sandy); moderate coarse prismatic, parting to strong coarse blocky structure; ped faces may have a discontinuous carbonate coating; pH 9.4.
B31	60–100	Red (2.5YR4/8) with (7.5YR5/6) mottles; coarse sandy clay loam; massive (structureless); strong consistence (dry); contains few (5%) calcareous nodules; pH 9.6.
B32	100–150	Light yellowish brown (10YR6/4) with (5YR5/6) mottles; medium clay (sandy); moderate medium blocky structure; contains very few (<2%) hard carbonate nodules; pH 9.8.
B33	150+	Yellowish red (5YR5/6) with (10YR6/4) mottles; medium clay (sandy); pH 9.8.
Management considerations
Distinct soil texture contrast between sandy surface (A) horizons and clay subsoil (B21) horizon Soft surface soil condition (ie. not hardsetting) may be susceptible to wind erosion. Thin conspicuously bleached A2 horizon. Coarse columnar structure with hard bleaching capping at top of B horizon, restricting internal drainage

Page top