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L
a nd
latter
it may be said that t
a ring
be
and those with a t
the light requi
proportion to t
r ee of shade which
The deg
much
It is gr
species of
r ch
bi
and la
h ade a
support s
und er shade beare
h t d
lig
manders under
r s under light demanders can live for long p
shade beare
of tim
light d
li
e as long a s shade bearers under shade bearers
climates and
und
r the reverse condition s
construct a strictly correct scale according to
r ements of the seve r al species
requi
om e species
amo
nt of shelter
h av
therefore
definition is
r o tection against cold
p
not again st light as such
silver fir
for in stanc
r ee
a high deg
more quickly than they can take it up from t
con sequ
ntly die
h e soil
wetting of t
is available
transpiration i s reduc
according as to whet
a n do without i t
life
or c
B y summing up the available experience of the lig h t
requirements of a numbe
L
Y
O
IT
AND
r ees with a d en se c r own are shade
r
ment does not always stand exactly in inve
h e density of the c r own
ates
in the case of beech
bies
then
r ch
The time during which
so di
ers
r s gene r ally die a fter ten to twenty
manders und
fer
ile soil
which are shade bearing
r otection
or p
been calle d
r
howeve
misl
heat
tran spiration frequently reaches such
r e not sheltered
if t
ey a
H
ence
or shelter
and in the latter t
d
h er they requir
FO
T V
or
h in c r own light d
seve
P icea
least strong in oak
hade b
arers after about five years
r lig
species can do wit
H
nce
d uring ea
shade demanding
ading
as th
a nd excessive t r anspiration
In young plants of be
they r
q ui
In the former case mo
h e temp
pecies are called
r of species
G
T
TI O
In a g
manding
r al species giv
n
xt
a species can
species standin g
h t demanders p r obably
h l ess light than
it is not possibl
r equire a certain
r ly youth
se plants require
h ey lose water
that t
h e soil
r e either a su
atur
and ther
shelter during early
scales have been
a l way
ner
though
r se
di
rs
that of the
pines
ars
riods
In warm
to
light
th
y
uch a
and
h
c
and
i ci
nt
r e wat
r
by the
or
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