acid deposition
acid soil
autumn
birch
deserted
drenthe
dutch
environment
europe
european
fall
fen
group
heath
heather
heathland
holland
landscape
lb
molinia caerulea
moor grass
moorgrass
moorland
naturally
nature reserve
netherlands
nitrogen deposition
no people
nobody
oak
oaks
peat
peat bog
peatland
pole
puddle
quercus robur
quiet
reestdal
rest valley
southwolde
trees
water