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FOREST UTILIZATION INDUSTRIAL FORESTRY 



lective logging has made real progress on the Goodman tract in Wis- 

 consin and on plots of the Camp Manufacturing Company in eastern 

 Virginia, the Crosset Company in Arkansas, the Weyerhaeuser Com- 

 panies in Idaho and the Northwest, and several companies in Cali- 

 fornia, Washington, Oregon, and Idaho. 



Generally, foresters mark individual trees to be cut. The diameter 

 sizes marked for cutting may vary with the species and with local 

 conditions, but studies have indicated that the best sizes for cutting 

 are 34 inches or larger, d.b.h., in Douglas fir; 40 inches in sugar pine; 



FIG. 86. Lodgepole pine stand selectively logged in the Rocky Mountains for 

 mine props, cross ties, poles and saw logs. 



20 inches in ponderosa pine in western Montana ; 18 inches in shortleaf 

 pine in Arkansas, loblolly pine in the Southeast, red oak in North 

 Carolina, and beech, birch, maple, and hemlock in the Lake States. 

 The advantages of selective logging are: 



1. Only trees yielding a certain profit are cut. Higher grades of 



lumber which command the best market prices are obtained be- 

 cause only the largest and best trees are removed. 



2. Felling, bucking, swamping, and skidding costs are reduced. Other 



logging costs, such as hauling, are reduced as well. 



3. The condition of the forest is improved because the favored species 



