CONTENTS 



XI 



PAGE 



Cost of the sj'Stem ...... 07 



Increased cost of logginp: .... 67 



Cost of protecting young growth ... 08 



Increased cost of construction work . . OS 



Value of seed-trees ..... 09 



Cost of impro\ement work .... 09 



Intensive development of the selection system . 09 



Results of the selection system .... 71 



Choice of the selection s\stem .... 72 



E.xample in the spruce forests of the Northeast . 74 



Chapter III. — Systems of Clear-Cutting 



Definition of clear-cutting . 



Conditions requiring clear-cutting 



Disadvantages of a clear-cutting . 



Methods of reproduction 



Advantages of artificial reproduction 

 Advantages of natural reproduction 



Clear-cutting with artificial reproduction 

 Use of the system in this country 

 Use in National forests 

 Use in State forests 

 Use in private forests 

 Clear-cutting the whole stand 

 Clear-cutting in strips . 

 Clear-cutting in patches 



Clear-cutting with natural reproduction 

 Conditions of success 

 Influence of market conditions 

 Clear-cutting the whole stand 

 Reser\'ing blocks of trees 

 Reserving scattered seed-trees 



83 



83 

 80 

 87 

 88 

 88 



89 

 90 

 90 

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 95 

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 97 

 97 



98 

 98 

 100 

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 103 

 107 



