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)
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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
The exceptions to this rule are where the destruction of seed trees
has been wide and absolute, where already established competing
species are not removed with the original forest, and where the
surviving fir is too old to seed. The two latter conditions are
most prevalent near the coast, where the wet climate not only tends
to protect slashings from fire and thus preserve the undergrowth of
shade bearing species which escapes logging, but has also prevented
the accidental destruction in the past of the original fir stand
by fire.
In considering these natural results as they bear upon proposed
methods, we find actual destruction of seed supply the easiest
to avoid. If the original stand contains suitable seed trees we
can protect a sufficient number of them. If not, or if it is less
expensive, we can secure seed elsewhere. More frequent difficulty
will lie in determining whether the reproduction of fir should
be the sole effort, or whether it should not be sacrificed, if
necessary, in order to utilize an existing start toward a second
crop of other species. This is of peculiar and early importance,
for it usually also decides the question of protecting the slashing
from fire.
If the present stand is nearly pure fir, or if other species are
represented almost wholly by merchantable trees, there will be no
young growth worth saving. A new crop must be started from seed, and
since fir is the quickest and easiest to grow, as well as probably
the most valuable, it should be given every encouragement.
_Slash Burning and Its Exceptions._
In most cases this requires burning the ground after logging, not
only to reduce the future fire risk but also to provide a suitable
seedbed. Fir much prefers mineral soil to start in, as is easily
seen from the far greater frequency of seedlings on road grades
than on adjacent undisturbed ground covered with humus and rotten
wood. Hemlock has no such fastidiousness, even preferring rotten
wood as a seedbed. To protect the slashing from fire, therefore,
both preserves the most unfavorable conditions for fir and subjects
it to unnecessary competition by its rival. Hemlock seedlings already
established, seeds lying on the ground, and surrounding or surviving
trees which may scatter more seed, are all encouraged to shade and
stifle the struggling fir seedlings already handicapped by dislike
for their situation.
Public-domain text, read in full here on John Shaqi.
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