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P R
general economic principles
and managed for a sustain
h r
r n
h
g
tu
which the factors of
if possible improved
In the case of
soil and a favourabl e stat
air
any system can
requirements of the case
quali
y
and still mor
able climate
o f the factors of the lo cality
set in
which may end in compl
clear cuttings must be avoid
e
ort made to ke
of tr
es
in other word s
a s to l
ad th e old crop gradually over into a
this precaution is taken
undergoes violent changes
prod uction
shelter
wood selection system
which produce uneven ag
uniform sy stem
P RO T
h ould be the obj ect of a good management to produce
It s
healthy woods
dang
rs to which they are exposed during life
a nd method of regeneration are of principal importance in this
respect
the system is also of some acco unt
water ru
ning down sloping g
o f landslips
woo
s of un
under the
h
I L VI
TI ON
VA
hence
it is nec
locality are at lea st maintai
xceptionally good localities with a
adopted which
so on poor localiti
the first consideration must be
p the area permanently stocked with a crop
The syst
m s best adapted in such cases are the
and coppice with standard s
TI ON AGA I N
which are capable of resisting succ
ct is to counteract the eroding e
h
avalanc
s
or d
ven age must be the rule
lter
wood selection system or the group system
T URAL
UL
A
OR
fo
d yield
and no t for a t
r y to s
ssa
r
of moistu
all localities of only middling
a ste a dy det
or else
te sterility
d as much as p
to r
gen
rate under shelt
the degree of moistur
which act most inj uriously on
the other shelt
d young
T
T
X
r ound
to preven
vastation thro
T
Y
M
L
O
r ests should
lect a system unde
and t
mperatur
a n s
ers to
s with an unfavour
preservation
rioration will
In such cases
ssible
crop
r
wood system s
ood s
the shelt
L
RNA
ANG
Though sp
th e occur
gh
hifting sand
such a s are produc
L
A
Y
worked
r ary
mpo
r
ed
r ich fresh
the
o ther
and
very
r
wood s
so
U
nless
in
soi l
r
wood
R
ssfully the
cies
ects of
r
nce
d
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