vegetation through years of natural selection and genetic adaptation
has developed as an indicator of soil type. Despite farmers clearing
large areas of farm land, pockets of original timber do occur for
example, alongside roads and on crown reserves.
ti trees, smooth barked angophoras, waratahs, Gymea lily, and
scribbly gum prefer sandstone soils. Grey box and spotted gum are an
indicator of shale soil on the coast. Blackbutts indicate better
quality shale soils. Tree ferns and bracken ferns prefer rich
volcanic soil. Much of the granite based southern wheat soils of NSW
were originally covered with yellow box and cypress pine.