﻿46 



BULLETIN 11, U. S. DEPARTMENT OF AGRICULTURE. 



breastliigh. Table 29 shows the same tiling in per cent of grades instead of in board 

 feet. All trees 5 and 6 inches in diameter, breasthigh, were scaled as entirely flitch, 

 and this grade is confined exclusively to these diameter classes. The other six grades 

 given apply to trees 7 inches and over in diameter, and comprise the main grades used 

 by the North Carolina Pine Association in the manufacture and sale of North Carolina 

 pine rough lumber. 



Table 28. — Yield per acre in board feet by grades from pure, even-aged, fully-stocked, 

 unmanaged stands of loblolly pine of different ages. 



QUALITY I. 



- 



Flitch. 



Yield per acre. 





Age. 



No. 1. 



No. 2. 



No. 3. 



No. 4. 



land 2 

 bark 

 strips. 



Box 

 bark 

 strips. 



Total. 



Basis. 



Years. 

 10 



1,200 

 3,290 

 3,071 

 2,178 

 1,272 

 591 



Bd. ft. 



Bd. ft. 



Bd. ft. 



Bd. ft. 



Bd.ft. 



Bd.ft. 



Bd'. ft. 



1,200 



4,700 



8,300 



12, 100 



15, 900 



19, 700 



23,800 



28, 100 



32, 600 



Plots. 



7 



15 







188 

 913 

 1,815 

 2,703 

 3,546 

 4,522 

 5,339 

 6,520 



940 

 3,237 

 6,050 

 8,586 

 11, 229 

 13,566 

 15, 455 

 17, 278 



94 

 333 



484 

 795 

 786 

 952 

 ' 843 

 978 



188 



498 



847 



1,113 



1,182 



1,190 



1,124 



978 



17 



20 



166 

 363 

 795 

 1,379 

 1,904 

 2,810 

 3,586 



83 



363 



636 



985 



1,666 



2,529 



3,260 



6 



25 



4 



30 - 



2 



35 



4 



40 



2 



45 







50 













Total 



















42 























QUALITY II. 



10 



400 

 2,296 

 2,484 

 1,944 

 1,650 

 1,380 

 1,162 



780 















400 



2,800 



5,400 



8,100 



11,000 



13, 800 



16, 600 



19, 500 



22, 600 



7 



15 







84 

 486 

 1,053 

 1,760 

 2,346 

 2,988 

 3, 510 

 4,294 



308 

 1,782 

 3,807 

 5,610 

 7,176 

 8,798 

 10, 725 

 12, 656 



56 

 216 

 405 

 550 

 690 

 830 

 780 

 904 



56 

 324 

 567 

 770 

 966 

 996 

 1,170 

 "1,130 



20 



20 - 



54 

 162 

 330 

 690 

 996 

 1,365 

 2,034 



54 

 162 

 330 

 552 

 830 

 1,170 

 1,582 



19 



25. 



3 



30 



6 



35 



2 



40 



5 



45 



4 



50 



1 









Total 



















67 























QUALITY III. 



10 



















6 



15 



1,131 



1,904 

 2,332 

 2,460 

 2, 233 

 1,786 

 1,130 







26 



140 



352 



600 



924 



1,410 



1,808 



2,412 



91 

 560 

 1,320 

 2,220 

 3,311 

 4,418 

 5,989 

 7,638 



26 

 84 

 176 

 240 

 308 

 376 

 452 

 536 



26 

 112 

 264 

 300 

 462 

 564 

 678 

 804 



1,300 

 2,800 

 4,400 

 6,000 

 7,700 

 9,400 

 11.300 

 13; 400 



4 



20 







4 



25 



44 

 120 

 308 

 470 

 678 

 1,072 



60 

 154 

 376 

 565 

 938 



3 



30 





35 



5 



40 





45 



1 



50 



1 









Total 



















24 























Cut by circular saw, r j-inch kerf. 



