Geoscience Reference
In-Depth Information
F
IG. 49
Development of moder humus from Douglas fir needle litter on a sandy soil, showing litter layer L, de-
composition or fermentation layer Fl, F2, and humified layer H above the mineral A horizon. Fresh and
aging excrements of: a, a' = leatherjackets (crane fly larvae, Tipulidae), b, b' = litter feeding
Adela
cater-
