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T
I N
ND
the other hand
trees has weighty drawbacks
r iou sly af
may inj u
r ee s maintain their side b r anches low do wn
isolat
d t
r es h
d
v
lop f
the value of the stems
of timber al so may be lower
xc
ptionally b
h er liabl
furt
fully stocked woods
l ayer
humus cannot be preserv
M o r eover a suitable d
by weeds
maintained
h er means must be devised to p r ese r v
ot
activity of
r wood
und
found that
h e trees
t
will
indi
erent soils it will
r
p
vious am ou
h e gene r al th
T
r con sid
und
ommencing wit
tr
s
singl
r
inc
asingly
r woo d
of an und
and is capable of protecting the soil
i s made
by w
ubs
quently
extension
The unde
such as by so
coppicing a portion
underwood its
h forest
stori
d hig
wood
and is p
O F OP
N
the early isolation of a po
h e height growth
ect t
nes
which for many pu
r oad concentric rings
to form more tapering boles than those g
In the maj ority
It follows that
h is is done by the introduction of an
soil
T
r soil p r ot
o
ext
a diamet
h old out only on soil s
t
r y
o
r ation may sho r tly
h the fi r st thinnings the most promising
d out
and t
h eavy t h innings
soon as the latte
h ich the remaining tr
r e thinnings follo
mo
r own s
the c
r wood can be establish
r planting
ing o
lf is allowed to grow into timb
in ot
r iodically
O O D
h e case of many species
In t
In the case
owing to the formation of
r ee
g
except on really fe
ction wood
r incr
ment
r a few years
aft
method of tr
described a s follows
h es
r e i solated su
a
so as to permit t
a fu
the overwood
d in a vari
by natural s
the overwo od
h ers
r emains a soil p r o tection
it
oppiced
TI MB
LAR
the trees
r poses seriously reduce
r s
conife
Isolated trees are
cases
d
its plac
moi stu
the continu
even t
laid on after isolating
some quality
sink back to its
atm
nt in the case
h e introduction
r has established itself
r t h er heavy thinning
s are completely isolated
as required by the
In som
r trees ( two
R
r tion
it
Th
n
and
v
n
the quality
r own in
a suf
cient
b
ing tak
n
r
cannot be
r til
soils
d
h en it i s
while on
ficiently by
ty of ways
r by
ding
o
cas
s
the
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