When holes were dug in this field after an interval of about 2? years, the sand formed a layer at a depth of ? inch beneath the surface. In 1842 (i.e.
, seven years after the sand had been laid on) fresh holes were dug, and now the red sand formed a distinct layer, 2 inches beneath the surface, or 1? inch beneath the turf; so that on an average .21 inches of mould had been annually brought to the surface. Immediately beneath the layer of red sand the original sub-stratum of black, sandy peat extended.
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