MM726

Site: MM726	Land Unit: Buckley Swamp Peats
*Aust. Soil Class.:* Terric, Acidic, Sapric ORGANOSOL (confidence level 4)

General Land Unit Description:
Buckley Swamp consists of a valley infilled by an earlier lava flow, with the subsequent blockage of the drainage line resulting in peat accumulation. The area has been drained and burnt at various times in the past, resulting in some decomposition and loss of peat. The dominant soils of the plain are Organosols with massive or well-structured surfaces. The soils of the backplain are commonly Hydrosols with well structured surfaces and peaty horizons. There are also minor occurrences of Vertosols.

Site Description:

Geology: Quaternary basalt overlain by alluvium	Landform pattern: Flood plain
Position in landscape: Drainage depression	Internal drainage: Imperfectly drained

Soil Profile Morphology

A11	0-20 cm,	Loam (possibly peat), soft surface, very weak consistence when moist, pH 5.4. Gradual transition to:
A12	20-60 cm	Loam (possibly peat), very weak consistence when moist, pH 5.5. Sharp transition to:
	Subsoil
D1	60-90 cm	Very dark brown (10YR2/2) light clay, red mottles, blocky structure, firm consistence when moist, pH 5.1. Clear transition to:
D2	90+ cm	Very dark grey (10YR3/1) medium clay, red mottles, very firm consistence when moist, pH(water) 7.2.

Key profile features:

Strongly acidic topsoil
Strongly acidic subsoil
Strong texture contrast between topsoil and subsoil
Mottled subsoil

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