216 Pedodiversity
The abundance of each soil group was plotted on a logarithmic scale
against the decreasing order of the soil group’s rank in abundance. Object
abundance was expressed in percentages so as to provide a more direct
comparison between soil landscapes with different areas. The abundance
distributions of soils derived from the four parent materials matched the
logarithmic normal distribution. Similarly, the abundance distributions of
soil groups developed on level lands and sloping lands and those on plain,
medium-gradient escarpment zone and medium-gradient mountain fi tted
the logarithmic normal distribution. These data are in agreement with
previous biodiversity and pedodiversity studies (Ibáñez 1995b, 2005a).
3.2 The result ...