Appendix

The system for designating the soils consists of letters only. This method has been adopted to make for easier insertion of new subgroups, and to make the codes easier to remember.

The following is a list of how each code letter has been used in the soil classification, the level at which it has been used, and the meanings.

Code	Order	Group	Subgroup
A	Anthropic	Acid, Aged	Albic, Acid, Aged, Artifact
B	Brown	Brown	Brown, Buried
C			Calcareous, Concretionary, Cemented, Compacted
D		Densipan	Pedal
E	Melanic	Melanic, Albic	Melanic, Earthy
F		Firm, Fibric, Fill, Fluvial	Fluid
G	Gley	Gley, groundwater-gley	Gley, Gleyed, Magnesic, Granular
H		Humic, Hydrothermal	Thick, Humose
I		Immature, Impeded	Immature, Inactive, Ironstone
J		Argillic	Argillic
K			Alkaline
L	Allophanic	Allophanic, Laminar, Litter	Allophanic, Laminar
M	Pumice	Mesic, Mafic, Mixed	Mottled, Yellow
N	Granular	Nodular	Nodular, Sodic, Stony
O	Organic	Orthic	Peaty, Orthic
P	Pallic	Pallic, Perch-gley	Pallic, Placic, Pumice, Perch-gleyed
Q			Saline, Ortstein
R	Recent	Recent, Refuse, Rendzic	Recent
S	Semiarid	Sandy	Sphagnic, Sandy, Tephric
T		Truncated, Tephric	Typic, Tailings
U	Ultic	Sulphuric, Duric	Sulphidic, Humus-pan, Duric
V		Vertic	Active, Vitric, Vertic
W	Raw		Weathered, Welded, Wet
X	Oxidic	Oxidic, Pan, Rocky, Fragic	Pan, Fragic
Y		Yellow	Yellow, Ultic
Z	Podzol	Solonetzic	Podzol, Podzolic, Silt