Reference soil Australia 10: Solonetz

AU010

Solonetzes occur where a sodium source supplies the clay-rich subsoil with exchangeable Na, causing peptization of clay and organic substances and deterioration of the topsoil.

Characteristics

Soils having a natric horizon (a subsurface horizon with distinct higher clay content than the overlying horizon and more than 15% exchangeable sodium) within 100 cm from the soil surface.

Distribution of Solonetz (rough estimation supplied by soilgrids)

Reference soil AU010: Solonetz

Classification

WRB 1998
Solonetz
FAO-UNESCO-ISRIC 1988		FAO-UNESCO-ISRIC 1974
Albi-Stagnic Solonetz		Solodic Planosol

Local classification:

HAS: Solodized Solonetz; FK: Dr3.43

Other classification

USDA-SCS (1975)

Natrixeralf xeric clayey mixed thermic

Profile description

Ah1 0-8 cm	dark greyish brown (10YR 4/2, moist)sandy loam,weak crumb,soft friable,few very fine roots,non calcareous 10% HCl,clear boundary to,
Ah2 8-15 cm	yellowish brown (10YR 5/4, dry) dark greyish brown (10YR 4/2, moist)sandy loam,massive,common fine faint clear mottles and common medium distinct mottles,few very fine roots,very few medium angular hard ferruginous concretions,non calcareous 10% HCl,gradual boundary to,
E 15-27 cm	white (10YR 8/2, dry) very pale brown (10YR 7/3, moist)loamy sand,massive,common fine faint diffuse mottles (10YR 5/3),few very fine roots,frequent medium angular hard ferruginous concretions,non calcareous 10% HCl,abrupt wavy boundary to,
Btn1 27-42 cm	claystrong very coarse columnar parting to prismatic,(10YR 3/2) and (10R 3/6),non calcareous 10% HCl,diffuse boundary to,
Btn2 42-53 cm	claycolumnar parting to angular blocky,(5YR 4/6) and (5YR 4/1),few medium angular hard ferruginous concretions,non calcareous 10% HCl,diffuse wavy boundary to,
53-69 cm	strong brown (7.5YR 5/6, moist)clay,columnar parting to prismatic,friable,few soft calcareous soft segregations,slightly calcareous 10% HCl,diffuse boundary to,
Ck 69-92 cm	strong brown (7.5YR 5/6, moist)clay,massive,friable,frequent soft calcareous soft segregations,calcareous 10% HCl,

Depth1	20cm
Kind 1 (parent material) ; Parker (eds), 1984	mixed lithology and composition
Mode of accumulation or deposition of parent material	unconsolidated, unspecified
Soil Depth	90cm
Texture of parent material	clayey
Texture of parent material (second entry)	sandy

Land improvements ; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	land clearing
Main type of irrigation; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	no irrigation
Land use or vegetation in the immediate vicinity of the site	cultivated pasture
Remarks on Land Use / Vegetation	LAND USE: land has been cleared for pasture. Improved pasture for sheep and cattle grazing. VEGETATION: originally savannah woodland. Remaining trees: mostly Eucalyptus camuldulensis (red gum) and E. leucoxylon (South Australian blue gum).

Altitude	101m
Physiographic Unit	slope
Regional landform; McDonald, R.C., Isbell, R.F. et all, 1984; Australian soil and land survey Field Handbook, Inkata Press, Melbourne.	plain
Slope Aspect	west
Topography; Guidelines for soil description - Fourth edition (FAO, Rome, 2006)	undulating

Lower limit of a slow permeable or stagnating layer in the profile	90cm
Drainage class ; FAO (2006) - Guidelines for soil description	imperfect
Kind of ground water table (USDA, 1979)	perched
Estimated permeability (class) of least permeable part of the profile	slow
Estimated run off (class)	slow
Upper limit of a slow permeable or stagnating layer in the profile	20cm

Surface cracking	no cracks observed
Rock outcrop class (FAO (2006) - Guidelines for soil description)	none
Surface stoniness class (FAO (2006) - Guidelines for soil description)	none

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Reference soil Australia 10: Solonetz

Characteristics

Reference soil AU010: Solonetz

Classification