Practical Forestry in the Pacific Northwest: Protecting Existing Forests and Growing New Ones, from the Standpoint of the Public and That of the Lumberman, with an Outline of Technical MethodsAllen, E. T. (Edward Tyson)
Science
Practical Forestry in the Pacific Northwest: Protecting Existing Forests and Growing New Ones, from the Standpoint of the Public and That of the Lumberman, with an Outline of Technical Methods
Allen, E. T. (Edward Tyson)
Pacific Coast -- Forestry
"Fir and incense cedar should be marked, as a rule, to as low a
diameter as these trees are merchantable in order to reduce the
proportion of these species in coming reproduction. It is essential,
however, that no large openings be made in the present stand since
the exposed ground is in danger of reverting to chaparral or of
becoming so dry from evaporation that no reproduction will follow
cutting. Where the stand of pine is insufficient to reseed thoroughly
and protect the cut-over area, enough sound, thrifty fir and cedar
should be left to form a fairly even cover with openings less than
a quarter of an acre in size.'"
The under current of all opinion upon sugar pine up to date is
that reproduction will not be very successful unless enough growth
to shelter the seedlings remains after logging. Where the fire
risk permits, the same end may be furthered by leaving the tops
scattered on the ground.
Little experimenting has been done in planting sugar pine, but
there are many indications that except where conditions strongly
favor natural reproduction it will be resorted to eventually if
any particular attempt is made to get this species. Leaving large
seed trees is not only expensive, but rather uncertain, because
heavy seed years are several years apart and squirrels consume a
large portion of an ordinary crop. Transplants which have received
nursery shelter until past the greatest danger of drying out should
prove most successful on heavily-cut south slopes.
REDWOOD (_Sequoia sempervirens_)
Although probably the most rapid-growing of all American commercial
trees and also of high market standing, redwood has been little
studied by foresters. The layman is still more confused by its many
peculiarities. Growing to a size of 20 feet in diameter and 350 feet
high, reaching an age of well over 1,000 years and seldom reproducing
by means of seed, it is not surprising that it was long regarded
as ill-adapted to second crop management. Although observing that
suckers sprout from the stumps with great rapidity, the lumberman
generally regarded these mushroom growths as abnormal and temporary,
and believed his virgin timber to be the finally-vanishing remnant
of a prehistoric species unsuited to present-day conditions.
It was next discovered that the suckering habit is no new one,
indeed that the majority of the present stand, however old, began
as sprouts from roots or stumps of its predecessors. This is evident
from the circular arrangement of several trees around the spot where
their parent stood. These old sprouts were of very slow growth,
for they were shaded by a forest of extreme density. As seedlings
they could have neither germinated nor grown, but as suckers they
were kept alive by the parent until light supply became available
through their increasing height or through thinning of the forest.
Under such conditions centuries were required to produce large
trees.
Public-domain text, read in full here on John Shaqi.
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