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Commonly Used Terms in Soil and Land Evaluation


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O

    Oligocene - Epoch of the tertiary period, from 38 - 22.5 million years ago.

    Ordovician - Geological period 525 - 440 million years ago.

    Organosols - ASC Soil Order classification - Soils that are not regularly inundated by saline tidal waters and have more than 0.4m of organic materials in the upper 0.8 m either extending down from the surface or cumulatively; or have organic materials extending from the surface to a minimum depth of 0.1 m directly overlying rock or other hard layers.

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CopyrightLast Modified 15/05/2004
© NSW Department of Natural Resources