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Trenk, Fred B. (Fred Benjamin), 1900- / Forest planting handbook
(1932)

How fast does a plantation grow?,   pp. 35-42 PDF (2.0 MB)


Page 41


trees) is 8.1 cubic feet figured to a two inch top and 7.6 cubic feet to
a four inch top, the latter figure representing the present merchant-
able volume per tree.
   Complete stem analyses were made on 69 trees. The trees were cut
into eight foot lengths, and the volume computed to two inch and to
four inch tops. The growth as determined from the stem analyses
follows:
                                Table Vil
                Growth Table for Average Norway Spruce Tree
                          Based on Age at Stump
                                          Louis Frank Plantation, Prescott,
Wis.
   Age   Diameter Diameter  Total   Height   Height  Volume   Volume
   at     inside  Breast   Height    from     from      to       to
   Stump  Barkat High (out-  Above    Stum     Stump    2'Top    4VTO
          Stump  side bark)  Stump  to2 Top to4Top   D. I-B.  D. I. B.
  Years   Inhe     Inche     Feet     Feet     Feet    Cu. Ft.  Cu. Ft.
    5       .2        .0      2    -- - - - - - - - - - -- - - - - - - -
- -
    10      1.3      1.0       5     - - - - - - - - - -- - - - - - - - -
-
    15      2.7      2.0      14    -- - - - - - - - - - -- - - - - - - -
- -
    20      4.3      3.2      25        17   ---.1
    25      6.2      4.8      38       30    ---i6--      2.1      1.
    30      7.8               46 40    38        27       4.3      3.8
    35      8. 8     7.00     51       42       32        6.5      6.0
    40      9.5      8.0      57       45        37       8.7      8.4
    45     10.1      8.9      60       47        41      11.0     10.7
    Notes: 1. D. I. B. mews diameter inside bark.
          2, Figures for age of 45 are taken from a slightly projected curve,
extending
              beyond the actual age of the stand.
          3. Height of stump is one-half foot.
Growth on Principal Soil Types
  Plantations were studied in five different soil types, (1) Plainfield
sand, (2) Vilas sand, (3) Vilas sandy loam, (4) loam, and (5) silt
loam. On all of these soil types pine made rapid growth and no soil
type or region of the state was studied that would not warrant grow-
ing timber upon it, from the standpoint of financial returns. The most
rapid volume production observed was for a mixed plantation of Nor-
way and white pine 29 years of age growing on a worn out field of
Plainfield sand. The most rapid growth for a 15 year old plantation of
white and Scotch pines was found on a silt loam soil in Nelson Dewey
State Park.
  The following table summarizes the height growth found in plan-
tations of pine on the principal soil types, representative of those
which will be most generally used, in northern and central Wisconsin.
41


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