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Trenk, Fred B. (Fred Benjamin), 1900- / Forest planting handbook

Plantations for special products and purposes,   pp. 29-34 PDF (1.7 MB)

Page 33

windbreak are advisable and three rows are preferable. Trees should
be spaced six feet apart in rows that are eight feet apart Trees
should be in check rows, instead of staggered.
  On all light sandy soils white pine, Norway pine, and Scotch pine
are the best trees, although on all bad blow sand areas jack or Scotch
pine might be used on the outside row, the row most directly exposed
to the full force of the wind.
  On moist, clay or loam soils Norway or white spruce may be plant-
ed with the white or Norway pine. Other trees which make compact
windbreaks and grow well on good soils are white cedar or arbor
vitae, balsam fir, and Douglas fir of the northern Rocky Mountain va-
riety. The Colorado blue spruce makes a very compact windbreak,
but its rate of growth is so slow that many years elapse before it be-
comes serviceable.
  It is well to use at least two kinds of trees in a windbreak. One
row of the spruces or firs in the windward, or outside row, and one or
two rows of the white or Norway pine on the leeward or protected
side of the plantation make an excellent combination. The spruce
trees generally maintain their side branches down to the ground when
rown in the open, thus effectively stopping wind from driving
through under the trees; and the pines, because of more rapid growth,
make the windbreak effective at a comparatively early date. In addi-

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