Elementary principles of agriculture : a text book for the common schools . elementaryprinci02ferg Year: 1913 Forestry 269 384. Systematic Forestry teaches us to remove only the matured products, leaving the young timber to grow. France and many European countries have had to restore, though at great expense, the forest condi- tions to large areas that had been thoughtlessly destroyed. In many of the Old World countries no man is allowed to destroy a mature forest tree without permission of a forest official, and this is often given only when another is started to take its place. Such restric
Elementary principles of agriculture : a text book for the common schools . elementaryprinci02ferg Year: 1913 Forestry 269 384. Systematic Forestry teaches us to remove only the matured products, leaving the young timber to grow. France and many European countries have had to restore, though at great expense, the forest condi- tions to large areas that had been thoughtlessly destroyed. In many of the Old World countries no man is allowed to destroy a mature forest tree without permission of a forest official, and this is often given only when another is started to take its place. Such restrictions seem needlessly severe to us, but is it improbable that, some day, we may find some such restriction necessary for the public good? 385. The Exhaustion of Our Forest Resources is now going on at a rapid rate. Our forested areas are being rapidly reduced. Fig. 172 illustrates the present differ- ence between the use of for- est products and the rate of increase by growth. The east- ern states have long since all but exhausted their na- tural forests. They once secured the needed supplies of lumber from the virgin forests of the north central states, but today those areas are almost exhausted and pig. 172. Excess o7annuai cut the large lumber supplies over annual forest growth. are now furnished by the northwestern and southern states. The citizens of many states have heretofore referred with pride to the great value of their annual crop of forest products; but the time has come in many states where the crop removed is greater than the crop that grows. Scientific forestry does not mean that the use of
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