NORTH CAROLINA FOREST RESOURCES AND INDUSTRIES 



Appendix 



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forest type and stand condition, degree of fire damage, 

 density and distribution ot reproduction, growth, and site 

 quality. Data for the construction of volume tables 

 were collected through supplementary sampling by 

 J. W. Girard of the Forest Service, who also determined 

 timber-cull percentages. 



The Great Smoky Mountains National Park was omitted 

 from the survey because it is withdrawn from commercial 

 use. Its 227,000 acres bear an estimated 794 million board 

 feet of timber by the Scribner log rule. It is an area of 

 high, rugged topography and contains most of the red 

 spruce and Fraser fir still remaining in North Carolina. 



Increment 



Measurements for growth calculations were obtained 

 from increment borings made in a mechanically selected 

 sample of all trees over 3 inches in diameter. In general, 

 computational procedure consisted of determining the 



Survey Methods 

 Field Inventory 



THE field inventory of the forest resources of North 

 Carolina was started in the early part ol 1937 and 

 completed in the summer of 1938. To facilitate 

 analysis and use of the data, the State was divided into 

 lour survey units, the southeastern Coastal Plain, the 

 northeastern Coastal Plain (these two combined in this re- 

 port), the piedmont and the mountains. 



In the field survey six three-man crews gridironed the 

 State with compass lines spaced 10 miles apart (fig. 44). 

 At intervals of )% mile along these lines, }^-acre sample 

 plots were established. Records obtained on 37,730 plots 

 form the basis for computing the areas devoted to the var- 

 ious kinds of land use. Of these 22,140 were forest plots 

 and here detailed measurements and observations were 

 made concerning the number, size, and species of trees, the 



MOUNTAIN 



PIEDMONT 



COASTAL PLAIN 



LEGEND 

 SURVEY LINES 



SURVEY UNIT BOUNDARY 



NATIONAL PARK 



Figure 44. — Physiographic divisions, survey units, and approximate location of survey lines in North Carolina. 



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