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The depth is measured by the thickness of the layer of
soil
and of that portio n of the subsoil which can be pene
by the roots
available for the root system
s
or
of nourishing substances
soil
root system di
some d evelop a
longer period
fir
m aple
sycamore
roots
which send do
others again go to a moderate depth
a spen and birch
r face
su
such a s
of moisture of t
which in young t
advanc
d age
h e w h ole
t
h ers can subsist in s h allow soil
while ot
r mer
fo
height growth
gr
wth
with deficiency of dept
r ees may
T
r depth of soil
d
mands fo
mountain pi
mo uth pine
alder
ho
pine
elm s
lime
sweet chestnut
same time
T
I L
O
In due proportion to de
ers considerably in the several species
root w
such as oak
ash
n deep going rootlets
finally
r uc
p
h e soil modify
r ees frequently di
r tain
c
best indicator of t
su
ficient d epth produces full height
classified a s follows in
h
birc
be
ch
hornb
r se ch
stnut
r way maple
o
and especially oaks
the roo ts of t
FO
T V
h e stability of the trees
t
and the state of moisture in
h ic h is maintained fo r a s h orter or
chestnut
elm
r ch
lime
la
r ead altogether n
some sp
h e natu r e
T
composition
r oot system to some extent
ers f
h r ive well only in de
pecies t
h e d
h t h e height growth falls
fi
aspen
mountain ash
am
black poplar
sycamore
h
se species rarely go to a
G
T
TI O
r e the space
th a
cotch pin e
r s have strong side
o the
such as alder
as beech
hornbeam
and degree
r om th a t in a more
h they pr
thoug
pth of soil i s the
r esp
ct of their
ustrian pine
tr
cotch pine
white popla
ilver fir
la
the
silver
r the
a
p soil
fer
pruce
e willows
r
r c h
ash
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