VI. Silviculture 46 



Eelation Between Silvicultural Operations and the Value of 



Wood Products 46 



Planting 47 



Cutting the Old Timber to Secure Eeproduction 49 



Silvicultural Systems 50 



Strip and Group Systems 50 



Clear Cutting with Seed Trees 50 



Selection System 51 



Changing a Selection Forest to an Even-Aged Form 53 



Eeproduction of Even-Aged Stands by Successive Cuttings. . 54 



Sprout System 55 



Unwise Legislation Eegulating Silvicultural Methods 56 



Nature of the Investment Demanded by Silvicultural Oper- 

 ations 56 



VII. Fire Protection 58 



Fire Fighting 58 



Fire-Breaks 59 



Fire Laws 61 



Fire Patrol 63 



VIII. Tax Laws 65 



IX. Forest Mensuration 66 



Timber Estimating 67 



Determining the Growth of Stands. Yield Tables 68 



Current Growth of Stands 69 



Growth of Individual Trees 69 



X. Forest Valuation 70 



XI. Forest Policy 71 



Influences of Forests on Climate 72 



Influences of Forests on Streams and Soil Erosions 73 



Government Eegulation versus Government Ownership 73 



History of National Forestry in United States 74 



State Forestry 76 



Agricultural Soils versus Forest Soils 77 



The State as a Producer of Timber 78 



