28 



CHESTNUT IN TENNESSEE. 



The number of ties which can be cut from a stand increases with 

 its age up to a certain limit, after which there is no additional 

 increase, or only a slight one. The greatest annual yield of ties 

 from a first quality site is obtained when the stand is about 60 years 

 old. On second and third quality sites the maximum annual yield 

 is not obtained until the stands are at least 70 years old, because of 

 the longer time required for the trees to reach tie size. By cutting 

 the entire stand clear, a yield of more than 600 No. 1 ties per acre 

 can be obtained from 60-year-old stands of first quality; a yield of 

 364 ties at the same age from stands of the second quality, and 

 more than 200 ties from stands of the third quality. Table 8 gives 

 the yield of pole ties which can be obtained per acre from unthinned 

 stands of different qualities at different ages. While this table 

 shows the yield which can reasonably be expected from one clear 

 cutting of dense stands, it by no means gives the maximum yield 

 which can be obtained at intervals in two or three cuttings, or from 

 thinned stands. 



Table 8 Tie yield table. Yield of pole ties per acre in un- 

 thinned stands of chestnut (less than 33 per cent other species) at 

 various ages. (Pole ties 7 by 9 inches by 8.5 feet long). 



