GHF09b

Location: Byaduk

Australian Soil Classification: Ferric, Eutrophic, Brown CHROMOSOL
General Landscape Description: Level plain
Site Description: Flat
Land Unit: Warrabkook Basalts
Geology: Quaternary basalt

General Land Unit Description: This land unit consists of gently undulating basalt plains in the Macarthur area. In some drainage lines, the basalt has been dissected sufficiently to expose the underlying sediments. The soils on the basalt plains are commonly Brown Kurosols or Chormosols, intermixed with Sodosols, particularly on the lower slopes and drainage depressions. This site has two year old Eucalyptus globulus in a plantation on ex-agricultural land.





Soil Profile Morphology

Surface

A1	0-10 cm	Very dark grey (10YR3/1); clay loam; weak medium polyhedral structure , parting to weak medium granular structure; very weak consistence when moist; contains a few medium ferruginous nodules; many medium roots present; pH 5.1; clear and smooth transition to:
A2	10-22 cm	Very dark greyish brown (10YR3/2); clay loam; contains , many medium ferruginous nodules, common subangular moderately strong cobbles; common medium roots present; pH 5.6; abrupt and smooth transition to:
Subsoil
B21	22-70 cm	Yellowish brown (10YR5/6), with common medium distinct red (2.5YR5/7) mottles; medium clay; moderate coarse polyhedral structure, parting to moderate medium granular structure; weak consistence, moderately moist; contains a few medium ferruginous nodules; common subangular moderately strong cobbles present;contains a few medium roots; pH 5.6; diffuse and smooth transition to:
B22	70-100 cm	Pale brown (10YR6/3), with common medium faint yellowish brown (10YR5/7) and red (2.5YR4/8) mottles; medium heavy clay; moderate coarse polyhedral structure, (parting to moderate medium granular structure; very weak consistence, moderately moist; contains a few medium ferruginous nodules; common subangular moderately strong cobbles present; a few very fine roots present; pH 6.7; clear and smooth transition to:
C	100-140 cm	Light grey (10YR7/1); light clay; very abundant coarse fragments present; very weak consistence, moist; contains very abundant subangular moderately strong cobbles; a few very fine roots present; changes to:
	140-220 cm	Similar to layer above; changes to:
	220-410 cm	Mixed mottled clays and decomposing vesicular basalt, the basalt between 100-220 cm is most likely a large floater, live roots observed to 410 cm.

• Strong texture contrast between surface (A) horizons and subsoil (B21) horizon.

Horizon	Horizon Depth (cm)	pH (water)	pH (CaCl2)	EC dS/m	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	5.1	4.5	0.08	52	15	3.6	1.6	0.14	0.16	37	20	12	24	22.0	11.4
A2	10-22	5.6	4.8	0.07	15	11	3.2	1.6	0.10	0.22	38	22	12	26	34.7	11.7
B21	22-70	6.5	6.1	0.14		9.9	5.3	6.2	0.14	0.96	6	6	7	81	34.9	29.9
B22	70-100	6.7	6.0	0.14		9.6	6.4	10	0.14	1.8	6	13	13	68	37.7	29.2