of comparatively slow growth, also persistent in retaining branches
when grown in the light, it is not as promising for artificial
reproduction as Douglas fir or white pine. To let it become old
enough for good shingle material will be too expensive to pay,
for roofing is one of the wood products easiest to substitute for.
While cedar is adapted for poles, posts and other underground use,
less decay-resisting species can be made equally durable by chemical
treatment. In other words, as a second crop it is probably below
other species in ease of establishment, rapidity and quantity, and
will not have sufficient peculiar value to compensate for consequent
less economical use of the ground.

There may be exceptions to this rule. Good young cedar in forests
which are to be handled under the selection system should be carefully
protected. It can always be utilized and may bring revenue before
anything else can be cut. For the same reason it has been suggested
for planting with fir and white pine, either simultaneously as a
small proportion or later in blank spaces where the others fail.
Under such conditions the main stand will not be modified and the
cedar will afford a valuable adjunct.

SITKA SPRUCE (_Picea sitchensis_)

Although found in the moister mountain regions, this exceedingly
valuable tree seldom occurs to a commercially important extent
except along the coast, where it is common on swales and fertile
benches and in river bottoms often forms pure stands of great density.
Yields of 100,000 feet an acre are not unusual and the trees are
very large. It is also common, although of small size, in swamps.