The paradigm of soil science as it evolved between the world wars consisted of an approach to the classification of soil types that was based on the natural history tradition and a theory of soil genesis
as related to parent material and climate.
and classification, Iowa State University Press, Ames, Iowa.
For example, a natural soil group (homology) is evidence of a common history, process or mechanism, namely soil genesis
This information allows inferences about the organic matter quality in different environmental conditions and its implications to soil genesis
The capacity of a soil to hold cation to exchange species of those ions in reversible chemical reactions is a quality important for both fertility nutrition studies and for soil genesis
[2, 9, 10].
, Hydrological Properties, Root Characteristics and Microbial Activity of 1- to 50-year-old Stripmine Spoils.
ploughing, organic fertilisation, soil removal and addition for flattening soil surface) could drastically affect the topography through tillage translocation and erosion, thus indirectly affecting soil genesis
The B horizon has undergone extensive changes during soil genesis
so that the original parent material is no longer discernible; clay minerals have commonly accumulated by being translocated from above, and new minerals may have formed in place via chemical and physical reactions.
on a chronosequence, Pinery Provincial Park, Ontario.
The chapter on soil genesis
(pedogenesis) and profile differentiation is very comprehensive, including a section on composite pedogenic processes and the formation of specific horizons.
Some examples of ways in which humans have affected soil genesis
are by (Figure 2-26):