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when they have been cultivated beyond t
r al hom
natu
elm in
accommodating
supply of light
h e edges of woods p r od uce mo r e seed than those
or on t
hemmed in
r ably in the case of di
consid
total quantity of good seed produced du
or on the annual averag
by two things
The frequency of seed years
regard s the average yield per seed year
r ranged into two sectio
b e a
H
beam
elm
the o
of s
ed years
B eech se
r e yea r s
mo
spruc
r y th r
ev
r emaining species seed after sho r t
some do so every year
Taking bot
arranged into t
r c h
i
cotc
orway mapl
B eech
the strength o f long continued Ob servation s in
V
D
LOPM
r instance
as
fo
north of
this respect
r eased assimilation requi r
Inc
the crown
uppressed trees rarely p
The power of reproduction fro m se
B eech
oak
alder
aspen
maple
her han
the sp
rr anged as follows
a
d s only after interval s of
cotch pine
e to five ye
h facto r s into conside r ation
h e following scale
aspen
willow
h pine
spruc
T O F FOR
N
sweet chestn ut and
ngland
such as bi
hen ce
trees g
rent species
h e quantity of seed is governed
T
s a s follows
spruce
willow
sycamo
cies may
and alder seed
ar s
r
ho
beam
wych elm
sycamore
silver fi
T T R
h e limits of their
h er species are v
t
r ch and
s an increased
r owi
g in the open
r oduce seed
it depend s on the
r ing a certain period
a r
the species can
cotch pine
birch
r e
r fir
silv
as regar
eight
ten
o n an av
r inte
the speci
r
r ch
la
nglish
r y
co tch pine
di
ers
hor
r c h
la
r equency
s f
and even
rage
r val s
and
s may be
lime
ash
P russia
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