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Norway pine plantations, all on light sandy soil, planted under three
different conditions of soil preparation, showed the following annual
height growth up to the fifteenth year.
                               TABLE I
    Table Showing Effect of No Preparation of Soil. as Compared to Careful
            Methodi of Planting. on Height Growth of Plantations
                No Soil Preparation               Soil Prepared
          State Planting    Wilson         Nye-HaYes     State Planting
          Norway pine      Plantation       planting      Star Lake
          Boulder Flats   Norway pine     Norway pine    Norway pine
  Age      Slit Method    near Gordon        Wescott     Sod removed in
         S  not removed   Slit method      Plowed and   spots 18" square
         Soil: Plainfield  Soil: Plainfield  cultivated     Soil: Vilas
              sand            sand        Soil: Plainfieldsandy loam
                                              sand
 Years      Inches          Inches           Inches         Inches
    1          2               S                2              2
    2          2               4                2              4
    a          3               4                4              7     ,
    4          6                               11              9-
    5          5                5              10              51
    6          8               6               17              8
    7          6               6               20             15
    8          5               7               16             19
    9          5                8              26             16
    10          5               10              22             21
    11          8               11              22             26
    12         10               15              20             21
    iS          7               14              28             18
    14         11               12             '25             22
  Total        82'            108'            220"            196"
              6.8'             9'             18.8'          16.8'
         % of Nye-Hayes  % of Nye-Hayes   Height growth  % of Nye-Hayes
              87%             49%      .      100%           89%
  Where furrowing is not possible, and there is much sod, matted
roots, or weed growth present, "scalping" a plot for each tree
is nec-
essary. Scalping consists of removing the sod or matted roots with a
grubhoe or spade from an area one and one-half to two feet square.
The tree should be planted in the center of the cleared spot.
Spacing
  The spacing of trees may be determined by local planting condi-
tions as will be discussed more fully later. For most conditions and
species of trees, a six by six foot spacing is recommended. This re-
quires 1,210 trees per acre. Check rows, to secure this exact spacing,
are not necessary. If the furrows are plowed six feet apart, and the
trees are planted approximately six feet apart in the furrows, a sat-
isfactory spacing will be secured. With this spacing scattered losses,
even running as high as 15 per cent, will not make replanting neces-
sary. This density also. permits the most favorable growing room for
the trees during their first 25 or 30 years. After this growth, a light
thinning may be necessary, but the trees cut out as a result of thin-
ning will be large enough to have some market value.
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