Sombric Horizon - Soil Geography of the USA: A Diagnostic-Horizon Approach - page 241

Table 21.2 Classification of soils with sombric-like or sombric horizons in Soil Taxonomy (see
Table 21.3 for additional information) (Bockheim 2012 )
Pedon
no.

Published soil
taxon

Proposed soil
taxon Why lacking sombric horizon

Mexico

1 Typic Dystrudepts Haplorthods SOC distribution; high CEC; evidence for

podzolization

South America

2 Red Argisols

(Ultisols)

Kandihumults High extractable Al

3 Red Argisols

(Ultisols)

Kandihumults SOC distribution; high extractable Al

4 Red Argisols

(Ultisols)

Kandihumults SOC and color distribution; high extractable Al

5 Red Argisols

(Ultisols)

Haplorthods High extractable Al

6 Sombric Brunisol Kandihumults SOC distribution

7 Sombric Cambisol Kandihumults SOC distribution

8 Xanthic

Acrustoxes

Xanthic
Acrustoxes

Color distribution; high PBS

9 Sombriques Haplustands SOC and color distribution

10 Sombriques Haplustands SOC distribution; high PBS

India

11 Pachic Fulvudands Pachic

Fulvudands

SOC distribution; high Alp

12 Andic Hapludoxes Andic

Hapludoxes

High Alp

Central Africa

13 Sombriorthox Sombriudoxes Sombric

14 Sombriudoxes Sombric

15 Sombrihumults Sombric

16 Typic

Humitropepts

Humudepts SOC distribution

17 Typic Paleudalfs Typic

Paleudalfs

SOC distribution

18 Ferralsol Sombriudoxes Sombric

19 Ferrisol Sombrihumults Sombric

20 Ferralsol Eutrudoxes SOC distribution; high PBS

21 Ferralsol Sombriudoxes Sombric

22 Ferralsol Sombriudoxes Sombric

23 Ferralsol Acrudoxes SOC distribution

24 Ferrisol Sombrihumults Sombric

Sombric

25 Ferralsol Sombriudoxes

26 Ferralsol Sombriudoxes Sombric

27 Ferrisol Sombrihumults Sombric

28 Ferralsol Sombriudoxes Sombric

29 Tropical Sol Brun Lacks SOC data

30 Ferralsol Acrudoxes SOC and color distribution