Jeveuard he JU 
THE FORMATION AND TENDING 
OF FORESTS 
CHAPTER Vi 
THE FORMATION OF FORESTS 
Brrore beginning the formation of forests it is 
important to know the advantages and disadvantages 
of pure and mixed woods. 
In the case of pure forests the management is 
simple. A pure forest may be regenerated with lit- 
tle trouble by careful selective cutting, or by cutting 
clean and planting afresh. In the case of a pure, 
irregular forest, one may cut down to a diameter 
limit and constantly reap a crop, provided the amount 
removed is never greater than the product of growth. 
In spite, however, of the fact that pure woods are 
easily managed, they are easily blown down by the 
wind if shallow rooted, as with the spruce. In pure 
woods only one kind of material is yielded, and in- 
sects may often do an immense amount of damage. 
With several species, or even only two species, the 
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