3368 Chapter 27 



Table 27-47 — Normal yield per acre for second-growth yellow -poplar in board feet 

 (Scribner) and cubic feet on four sites (McCarthy 1933)''^ 



Dbh class and Site index^ 



age (years) 60 80 100 120 



Trees 9 inches in dbh and larger (board feet Scribner 

 scale)"* 



10 — — 150 360 



15 50 210 870 1,960 



20 190 1,030 2,920 5,800 



25 450 2,370 6,180 10,810 



30 930 4,430 9,900 15,810 



35 1,540 6,800 13,700 21,050 



40 2,370 9,270 17,500 26,500 



45 3,380 11,850 21,400 31,560 



50 4,580 14,410 25,300 36,600 



Trees 5 inches in dbh and larger (cubic feet)^ 



10 — — 135 360 



15 80 415 800 1,180 



20 320 880 1,475 2,040 



25 570 1,340 2,145 2,900 



30 825 1,800 2,800 3,770 



35 1,080 2,250 3,450 4,600 



40 1,335 2,690 4,085 5,410 



45 1,590 3,130 4,710 6,200 



50 1 ,840 3,570 5,330 6,970 



'Based on 89 plots scattered well over the species range and representing the best stocked areas 

 that could be found. 

 ^Stump height, 1 foot. 

 •'Site index = height at age 50. 

 "^Top diameter outside bark, 6 inches. 



^Peeled volume of the merchantable stem, excluding stump and top less than 3 inches inside bark. 



