Studies on the pedology of five soils above Tertiary sediments in the lower Coal River Valley, South-East Tasmania

TL;DRAbstract

A pedological study was made of five soils occupying a small relatively elevated (30-50 metres ASL) area of the University of Tasmania Farm, Cambridge, Tasmania. The soils formed above unconsolidated Tertiary sediments. Examination and sample collection sites were chosen to represent areas of minimal erosion/deposition (UF1 and UF2)and a sequence on a straight uniform toeslope (UF3, UF4 and UF5) exposed to colluvialactivity. Soil morphology was recorded at each site. A major difference in primary profile form was noted as between a uniform, black cracking clay (UF1) and four duplex soils (UF2,UF3, UF4 and UF5) three of which (UF2, UF4 and UF5) were very strongly duplex. Laboratory examination included physical, chemical and mineralogical analysis, viz, particle size analysis, bulk density measurement, soil reaction (pH 1:5 H\\(_2\\)0), electrical conductivity (EC 1:5 H\\(_2\\)0), cation exchange capacity and exchangeable cations (Ca, Mg, K, Na, Al and H), X-ray diffraction of oriented

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