The spongy , unstable , waterlogged , anaerobic beds of peat can be up to 20 m deep with low pH ( pH 2.9 -- 4 ) and low nutrients , and the forest floor is seasonally flooded .
The spongy , unstable , waterlogged , anaerobic beds of peat can be up to 20 m deep with low pH ( pH 2.9 -- 4 ) and low nutrients . The forest floor is seasonally flooded .