Agriculture Reference
In-Depth Information
The development of spodosols on an age series of aeolian beach ridges forming on
dominantly-quartzitic parent materials in southern New South Wales provides an
example of a chronosequence that has formed during the Holocene (Bowman, 1987).
The developing soils were accurately aged from the carbon contained within shell
fragments. Figure II.12 presents a cross section of the site indicating the short time
required for initial horizon formation (less than 1000 years) and its rapid development
with age in these permeable materials. A number of other soil properties were found to
be related to soil age and this is illustrated in Figure II.13a which shows the exponential
increase in organic matter content of the B horizon and, in Figure II.13b, the linear
decline in C horizon pH with time before the present.
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