GHF07b

Location: Mumbannar

Australian Soil Classification: Melacic-Basic, Arenic, Bleached-Orthic TENOSOL (very thick sandy surface horizons / overlying clay)
General Landscape Description: Dune field
Site Description: Gently undulating plain
Land Unit: Follett Dunes and Plains
Geology: Quaternary aeolian

General Land Unit Description: The majority of this land unit falls south of the Kanawinka fault. This land unit comprises areas with deep sand deposits. The residual landscape is thought to be influenced by the retreat of the Murray Sea which left stranded beach ridges oriented south west–north east. These were subsequently covered by superficial sand sheets in later depositional phases, which formed the landscape seen today.

The major landforms in this land unit are dunes and swales. Podosols and Kurosols or Chromosols are the major soil types found on the dunes and rises. Podosols are soils with a ‘coffee rock’ layer. The Kurosols or Chromosols tend to have a deep sandy topsoil over the clay. The common soil types on the swales are black cracking clay (Vertosols) or Grey Sodosols. Some Ferric Kurosols or Chromosols can also occur on the swales or lower slopes of the dunes.

1.5 year old Eucalyptus globulus plantation on ex-agricultural land.




Soil Profile Morphology

A1	0-20 cm	Very dark grey (10YR3/1); loamy fine sand; single grain structure; loose consistence, moderately moist; many medium roots present ; pH 5.3; clear and smooth change to:
A21	20-40 cm	Light yellowish brown (10YR6/4), with many coarse faint very pale brown(10YR8/3) mottles; fine sand; single grain structure; loose consistence, moist; few fine roots present; pH 5.7; gradual and smooth change to:
A22	40-90 cm	White (10YR8/2), conspicuously bleached; fine sand; single grain structure; loose consistence, moist; pH 6.1; diffuse and smooth transition to:
A23	90-160 cm	Light grey (10YR7/2), conspicuously bleached; fine sand; single grain structure; loose consistence, wet; pH 6.0; changes to:
Subsoil
B21	160-190 cm	Light grey; sandy clay; changes to:
	190-210 cm	Grey; clayey sand; changes to:
	210-320 cm	Sand ; contains soft limestone (CaCO3) fragments, that become more concretionary (harder, denser) with increasing depth.

Horizon	Horizon Depth (cm)	pH (water)	pH (CaCl2)	EC dS/m	Organic Carbon %	Total Nitrogen %
A1	0-20	5.3	4.5	<0.05	1.6	0.14
A21	20-40	5.7	5.0	<0.05
A22	40-90	6.1	5.4	<0.05
A23	90-150	6.0	5.2	<0.05