METHOD FOR REGULATING THE YIELD IN 

 SELECTION FORESTS. 



For Application in Small Timber Sales. 



By Walter J. Morrill. 



Timber sales, properly conducted, offer an opportunity to in- 

 crease the stand's productivity. The degree to which beneficial 

 results are attained depends largely upon the intensity of intelli- 

 gent care given by the Forest officer in charge. He should be 

 proficient in the fundamental lav\^s of silviculture, the art of 

 growing trees for timber. It is only little less essential that he 

 understand and apply some of the principles of forest regulation. 



Much literature on silviculture is available to him, and this 

 should be complemented by his own observation. It is not pur- 

 posed here to enter into that subject. Relatively little on forest 

 regulation has been written for Forest Rangers, who handle the 

 small sales. This may be due to the fact that regulation marks 

 an advanced stage in the development of forestry practice in a 

 country still young in that art. Forest regulation of selection 

 forests implies the application of such measures as best tend 

 eventually to secure normal stands that, usually connectively, will 

 sustainedly yield the highest possible returns. A stand of a few 

 acres doe? not ordinarily admit of the best business management 

 unless it is handled in connection with other stands. Many such 

 stands, therefore, are more profitably grouped for business rea- 

 sons into one unit, in order that the yield of the whole may be 

 mere economically marketed in a manner that results in fairly 

 even annual or periodical returns that will perpetually recur. 



The maps and written plans outlining in more or less detail 

 when and where fellings shall be made in the group of stands and 

 prescribing the volume of the fellings based upon the annual 

 growth, the silvicultural systems to be used, the rotation, measures 

 for fire protection, grazing restrictions, and matter pertinent to 

 the organization of the tract form the working plan. 



Without a working plan, regulation can not be fully applied. 

 But in any stand where a green timber sale is progressing in a 



