GL46

Location: Drik Drik

Australian Soil Classification: Haplic, Eutrophic, Red FERROSOL (confidence level 1)
General Landscape Description: Undulating plains
Site Description: Crest of Dune
Land Unit: Nelson Plains and Dunes
Geology: Quaternary limestone

General Land Unit Description: This land unit occurs in the south western corner of the region. The land unit is generally composed of siliceous sand dunes and plains over calcareous material. The partly consolidated calcareous deposits were formed in an arcuate band (north west / south east trending) formed by the retreat of the Murray Sea. The siliceous dune and sand sheet material is generally of aeolian origin. Although there is a large area of this land unit in the south west of the study area there are also some isolated patches, mainly mixed amongst the Follet land unit that could not be mapped due to restrictions of scale.

The sand varies from orange (GL48), to red (GL39) to a paler colour. The orange and red sands are usually associated with the calcareous material, whereas the paler sands tend to have less carbonate (e.g. GL51, GL38) or the calcareous material is greater than 2 metres deep (e.g. GL50). Another soil variant occurs on the swales in between the dunes. This soil tends to have a heavier textured subsoil which may or may not have calcareous material underneath.

Surface Soil
A0	0-6 cm	Sandy; pH 5.7; changes to:
A1	6-16 cm	Dark reddish brown (5YR2.5/2); sandy loam; granular structure; pH 6.3; changes to:
Subsoil
B21	16-47 cm	Dark reddish brown (2.5YR2.5/3); sandy loam; granular structure; pH 6.2; changes to:
R	47-70	Limestone; pH 6.3.

• Sand throughout
• Shallow soil
• Sand over limestone

Horizon	Horizon Depth (cm)	pH (water)	pH (CaCl2)	EC dS/m	Organic Carbon %	Total Nitrogen %	Exchangeable Aluminium ppm	Exchangeable Acididty meq/100g	Exchangeable Cations				Coarse Sand (0.2-2.0 mm) %	Fine Sand (0.02-0.2 mm) %	Silt (0.002-0.02 mm) %	Clay (<0.002 mm) %	Field Capacity % w/w	Wilting Point % w/w
									Ca	Mg	K	Na
									meq/100g
A0	0-6	5.7	5.2	0.40	5.7	0.31	15	17	11	4.1	0.5	0.9	23	52	4	10	28.2	19.7
A1	6-16	6.3	5.6	0.17			13	10	5.8	1.5	0.28	0.85	21	60	3	10	14.5	8.6
B21	16-47	6.2	5.7	0.18			11	7.5	3.5	1.3	0.12	0.66	21	62	4	11	12.6	5.4
R	47-70	6.3	5.8	0.25			11	5.8	3.5	1.6	0.17	0.87	19	64	3	13	12.2	6.2