Soil Atlas O — Organic surface horizon

O

Horizon master symbol

Organic surface horizon

Surface layer of more strongly decomposed organic matter (more than 30% organic matter); Of = fermented, Oh = humified.

KA3 KA4 KA5 KA6

KA3–KA5

4

KA6

16

Symbols in DB

18

Examples: Of Oh

Related suffixes

h

humic, enriched with humus

e.g. Ah

KA3 KA4 KA5 KA6

Profiles with this horizon

18

2025KPG01P01 DOI

2025KPG03P01 DOI

2025KPG04P01 DOI

2024KPG01P01 DOI

2024KPG06P01 DOI

2024KPG05P01 DOI

2024KPG03P01 DOI