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                                                     Table VI
                 Average Cubic Volume Per Acre Produced in Plantations of
Norway, White, and
                               Scotih Pines in Wisconsin, at Five Year Age
Intervals
             Norway Pine                             White Pine         
                 Scotch Pine
    Age       Vol.     No. of   No. of     Age       Vol.    No. of   No.
of     Age      Vol.     No. of   No. of
    in       cu. ft.   solid    cords      in      cu. ft.   solid    cords
     in      cu. ft.   solid    cords
    Plant.      per     cu. ft.    per     Plant.     per     cu. ft.   per
     Plant.    per      cu. ft.   per
    Years      acre     per cd.   acre     Years     acre     per cd.   acre
    Years     acre    per cd.    acre
    -               5    -5-                                        ----------------------
    10         150      67        2.2      10        130      67        1.9
     10        100      67        1.6
    15         600      69        8.7      15      - 450      69        6.6
     15        500      68        7.8
    20       1,875      71       19.8      20       1,000     71       14.1
     20      1,270      69       18.4
    25       2,600      73       85.6      25      2,060      78       29.0
     25      2,200      71       80.0
    80       5,850      78       50.0      80      8,250      76       42.7
 …      ……--…            … ------ -
 _________--------_        -------- _ _ ____35 4,625      78       59.3________
    --------
    Note: Taken to a two inch diameter at the top. No volume measured in
a tree that did not have an eight foot stick
with a two inch top. Each species reaches the height of four and a half feet
in about seven years, at which time the
tree beans to put on diameter breast high, and potential volume begins, but
is not shown in table until a stick eight feet
long with a two inch top is produced. Although this early volume is probably
not a merchantable volume, it is poten-
tially present, and as soon as a definite size is reached, (as for instance
6" D. B. H.) it enters the merchantable claas.