GL83

Location: Winnap

Australian Soil Classification: Ferric-Sodic, Mesotrophic, Brown CHROMOSOL (confidence level 2)
General Landscape Description: Rolling low hills
Site Description: Mid to lower slope
Land Unit: Dundas Sedimentary
Geology: Tertiary sedimentary

General Land Unit Description: This land unit occurs on dissected slopes leading to valleys, predominantly in the southern portion of the study area. The dominant soil type is a Brown Chromosol, commonly with a ferric horizon above the occasionally sodic subsoil. The landform, along with the high percentage of ferruginous nodules above the clay are the major restrictions to land use. The sandy topsoil is susceptible to wind erosion.




Key profile features:

• Strong texture contrast between topsoil and subsoil
• Strongly acidic topsoil
• Bleached A2 horizon
• Mottled subsoil
• Sodic subsoil at depth
• Kaolinite at depth

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
A1	0-10	4.6	4.0	0.08	4.2	0.28	67	13	1.0	0.63	0.27	0.13	16	49	14	13	24.7	8.2
A2	10-32	5.1	4.4	<0.05			44	6.7	0.81	0.47	0.07	0.15	15	52	15	14	19.1	5.4
B21	46-60	5.9	4.8	0.07			23	11	2.3	5.3	0.18	0.72	6	20	5	66	35.7	23.7
B22	60-90	6.3	5.6	0.09			<10	12	2.4	7.8	0.22	1.1	3	9	6	82	46.6	30.2
B23	90-135	6.5	6.0	0.11				9.7	2.0	8.0	0.18	1.6	5	10	12	72	43.7	27