GROSS VOLUME 

 PER ACRE 

 (boofd leei) 



Norm pine unit : 

 L«* thon I.OOO 



1.000 to 1.999 



2,000 to 4,999 



10,000 0» more 



Southwest ond 

 southeast pme 



units: 

 Less ttion 1,000 



2,000 to 4,999 



5X100 to 9,999 



Saw-TlM6ER VOLUME AND AREA 



l-K.i RE 15. — Jrea and jolume comparison/or the upland iavclog-size forest 

 conditions in the pine units, according to gross volume of satv limier per 

 acre, 1934-35. 



higher-qualitv saw timber (i.e., timber suitable tor the 

 maniitacture ot industrial lumber, veneer, and ctwperage 

 stock) were called class A areas; all others were called 

 class B. In the north delta unit only 18 percent o[ the 

 forest land is in class A; but this area supports 41 percent 

 o\ the saw timber, ot which about halt is ot high quality. 

 On the class B forest area in this unit, less than 8 percent 

 ot the saw-timber volume is ot high qualitv. In the south 

 delta unit 20 percent ot the forest land is in class A, and 

 three-fitths ot the saw timber on this land and about one- 

 sixth of that on the class B forest area is of high quality 

 (fig. 14). 



A break-down ot the saw-timber forest area in the rolling 

 uplantis ot the pine survey units, on the basis ot volume of 

 timber per acre (tig. 15), indicates that the two south pine 

 units have a slightly greater proportion of their saw- 

 timber volume on areas supporting \V^M^ board feet »>r 

 more per acre than has the north piiic unit. In the north 



pine unit, stands of 2,0(XJ board feet or more per acre 

 occupy 72 percent of the forest area and include 92 percent 

 ofthe saw-timber volume. .Areas that suppcjrt 5/XXJ board 

 feet or more per acre make up only 30 percent of the total 

 forest area but contain 59 percent ot the saw-timber 

 volume. In the south pine units, stands ot 2,0(XJ Ixjard 



USfSWO .t9«2 



Sowlog 



Under Tops ond Sound 

 sawlog limbs cull 

 CLASS OF MATERIAL 



Fuunr. 16. — Total toiume in .orjs ot sommii mMrr-t^ in i.niKi- . 

 species group, size, unJ class tf mtsttrial, I'^J^-JS. 



19 



