Phaeozem

From Wicri Urban Soils
Revision as of 16:45, 13 October 2009 by imported>Thierry Daunois

A phaeozem (PH) can be defined through :

  • a mollic horizon

and :

  • a base saturation (by 1 M NH4OAc) of 50 percent or more and a calcium carbonate-free soil matrix at least to a depth of 100 cm from the soil surface, or to a contrasting layer (lithic or paralithic contact, petrocalcic horizon) between 25 and 100 cm

and :

  • no diagnostic horizons other than an albic, argic, cambic or vertic horizon, or a petrocalcic horizon[1]in the substratum

Possible qualifiers

For each RSG, there are some possible prefix and suffix qualifiers :

Prefix qualifiers

 
Suffix qualifiers
 
 

Source

Notes

  1. A petrocalcic horizon may be present locally (e.g. the "Tosca" in Argentina). Such petrocalcic horizons are considered to be polygenetic and may best be handled for classification purposes at phase level (e.g. Luvic Phaeozem, Tosca phase)

fr:Phaeozem