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38
Yrjö Ilvessalo, The Forest .’Resources’ of Finland in 1936—1938
In some districts the cause is to be sought directly in too heavy
cut-aings. In Ostrobothnia the growth has remained approximately the
fame, but in North Finland the reduction of the large over-mature
torests has caused the figure referring to the growth to rise in spite of
s slight decrease in volume. The rise in the figure indicating the
growth of forests on poor productive forest land, already mentioned,
is a striking feature throughout the country.
Table 22. Average annual growth per hectare.
Part of country Productive forest land Poor productive forest land Total forest area
1936— 38 1922— 23 1936— 38 1922— 23 1936— 38 1922— 23
m3/ha
West Finland...................... 3.38 3.15 0.75 0.51 3.00 2.85
East Finland ...................... 2.81 3.09 0.73 0.63 2.53 2.74
Ostrobothnia....................... 2.12 2.08 0.54 0.37 1.76 1.74
South Finland ..................... 2.92 2.90 0.67 0.52 2.57 2.55
North Finland ..................... 1.07 0.93 0.33 0.24 0.86 0.73
Whole country..................... 2.21 2.13 0.48 0.35 1.84 1.77
The division of the growth according to species of trees
will be discussed later in dealing with the total growth, but it is worth
mentioning briefly at present that the different species represent the
following average growth per hectare and per year.
Pine Spruce Birch Aspen Alder Total
South Finland _________ 1.02 0.86 0.54 0.06 0.09 2.57 m3/ha
North Finland........ 0.42 0.2 5 0.18 O.oi — 0.8 6 »
Whole country ....... 0.76 0.60 0.39 0.04 0.05 1.84 »
The average growth per hectare in forests of different groups
of owners is shown in Table 23, in which the results of the survey
in 1922—23 are included for the sake of comparison. The figures to
Table 23. Average annual growth per hectare in forests of different
groups of owners.
Group of owners South Finland North Finland Whole country
1936—38 1 1922—23 1936—38 1 1922—23 1936—38 1 1922—23
m3/ha
Private individuals. 2.65 2.66 0.99 0.95 2.29 2.29
The State ........ 2.17 2.08 0.83 0.71 1.08 0.96
Wood-working
companies .......... 2.66 2.65 1.45 1.28 2.54 2.52
Communes........ —. —. — — 2.84 2.25
Churches ......... — — — — 2.71 3.06
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