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T
I N
ND
i
erences in the breadth of the concen
slight
The timber mu st have a h
B oles free from branches and non
if heavy thinnings are made at an
any rate no t in t
dens
hen the low
ant of light
can do something
h er
T
is naturally a tendency to produce broader rings
r ing youth tha
d u
r eases the dif
inc
h con sist of a numb
whic
r rounded by a seri
su
r poses of smaller value than if the rings are of
many pu
uniform br
r
gard s the density of the timber
made b
tw
en
leaved species which hav
h e wo
t
d
broad rings indicate high density
r atively low density
compa
h e same probably holds good for species w h ich h ave
T
h e pores unifo r mly distributed over the ring
t
ho
ever
the matter i s reversed
usually represent low density and na
consequently
to a certain age
h e whole
t
high
class timber
avoided
The rule
to be made
h e wood
T
of
principal height growth
gradually become heavi
h e best t r
of t
h is way
t
O F
RO
h e sam
r branc
P runing canno t make up for this
later on
renc
s of narrow rings
h t h roug h o ut
ad
various species
h eavy thinnings must be avoided
it m ay be said that
heavy t
h ere
ru
s as follows
h inned lightly until towards the end
hould be t
s by the gradual removal of
r eadth of
b
D
D
O OD
gh degree of density
tapering are not produced
arly age of the
degr
e as if t
h es are mor
h
avy thinning at an
leading to the formation of trunks
r oad rings in the cent r e pa r t
r of
In the case of those broad
the pores in
her
heav
as in t
r row rings high density
h innings at an early age s h o uld be
according to which the thinnings
Then the thinnings should
r
so as
assist a s
annual
T
AF
R
ARLY YOU
ric ring s must
h e wood w
r apidly killed for
uch ti
a distinction must be
r ing po r tion of
p
and na
thinnings a
In conifers
h
ir case b
at any
in the production of
lected number
r ings will be fai r ly even
T H
ood
at
r e kept
though it
arly
b
r is for
rr ow rings
r e indi
r oad rings
r a
e up
o thers
In
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