EnvThes
soil horizon
O layer
organic layer
[Agren & Andersson 2012] Accumulation of litter and particular decomposed plant parts on top of the mineral soil. Often sub-divided into litter (S, L and F) and humus (H) horizons. This horizon consists mostly of organic matter. In forest soils, this horizon is often called forest floor
[controlled by ] Staszewski 08.06.2013
O horizon