GGR205H1 Lecture Notes - Lecture 8: Mollisol, Soil Horizon, Midwestern United States
13 Dec 2016
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Document Summary
From chapter 2 origin parent material and means of deposition, development over time referred to as soil genesis, unique characteristics appearance, properties, behavior. Soils in the field are heterogeneous; that is, the profile characteristics are not exactly the same in any two points within the soil individual you may choose to examine. Consequently, it is necessary to characterize a soil individual in terms of an imaginary three- dimensional unit called a pedon. It is the smallest sampling unit that displays the full range of properties characteristic of a particular soil. the concept of pedon and of the soil profile that characterizes it. Note that several contiguous pedons with similar characteristics are grouped together in a larger area (outlined by broken lines) called a polypedon or soil individual. Several soil individuals are present in the landscape on the left. All the soil individuals in the world that are similar are grouped into a soil series.
