LIFE HISTORY OF SHORTLEAF PINE. 



43 



Table 18. — Yield of second-growth shortleaf pine in Arkansas. 



[Based on 38 fully stocked sample plots; area, 5.8 acres. All trees 6 inches and over in diameter breast 

 high were scaled. Top diameter, 5.5 inches ; stump height, 1 foot; number of trees per acre, see page 17.] 



QUALITY I. 





Average 

 height 

 of tree. 



Average 

 diameter 



6 inches 

 and over. 



Total 

 basal area 



(breast 



high) per 



acre. 



Yield per acre. 



Age (years). 



Saw timber. 



Total 

 volume. 





Scribner 

 rule. 



Doyle 

 rule. 



20 



Feet. 

 43 

 50 

 55 

 60 

 65 

 69 

 73 

 76 

 79 

 81 

 84 

 86 

 88 



Inches. 

 7. 5 

 8.6 

 9.6 

 10.6 

 11.4 

 12.2 

 13.0 

 13.6 

 14.2 

 14.8 

 15.3 

 15.8 

 16.2 



Sq. ft. 

 166 

 182 

 195 

 205 

 213 

 219 

 225 

 230 

 234 

 237 

 240 

 242 

 243 



Bd. ft. 

 8,000 

 12,700 

 17,500 

 22, 400 

 27, 500 

 32,500 

 37,400 

 42, 200 

 46,850 

 51,350 

 55, 750 



Bd. ft. 



Cu. ft. 



2,500 



25 



4,200 

 6,600 

 9,700 

 13, 400 

 17, 600 

 21,800 

 25, 600 

 29,000 

 32, 100 

 35, 000 

 37,800 

 40, 500 



3,630 



30 - 



4,900 



35 



6,060 



40 



7,010 



45 



7,730 



50 



8,320 



55 



8,850 



60 



9,320 



65 



9,760 



70 



10, 160 



75 



10, 520 



80 





10, 850 









QUALITY II. 



20 



35 

 41 

 46 

 51 

 55 

 58 

 61 

 .64 

 67 

 69 

 72 

 74 

 76 



6.6 

 7.5 

 8.3 

 9.1 

 9.9 

 10.7 

 11.3 

 12.0 

 12.5 

 13.1 

 13.6 

 14.1 

 14.5 



125 

 139 

 150 

 159 

 167 

 173 

 178 

 183 

 186 

 189 

 191 

 193 

 194 



4,350 

 7,450 

 10, 600 

 13, 800 

 17, 000 

 20, 200 

 23,450 

 26,850 

 30, 600 

 34, 050 

 37, 500 

 40, 850 

 44,000 





1,740 



25 



2,700 

 4,500 

 6,800 

 9,500 

 12,400 

 15, 400 

 18,200 

 20, 600 

 23,000 

 25, 200 

 27, 400 

 29, 500 



2,520 



30 



3,390 



35 



4,220 



40 



4,930 



45 



5,520 



50 



6,050 



55 



6,520 



60 



6,980 



65 



7,410 



70 



7,800 



75 



8,160 



80 



8,500 





QUALITY III. 



6.3 

 7.0 



9.1 

 9.7 

 10.3 

 10.8 

 11.4 

 11.9 

 12.4 

 12.9 



95 

 105 

 113 

 120 

 126 

 131 

 135 

 138 

 140 

 142 

 143 

 143 



2,600 



4,300 



6,000 



7,900 



10, 000 



12, 200 



14, 600 



17, 100 



19,600 



22, 000 



24, 600 



27, 100 



1,200 

 2,500 

 3,900 

 5,500 

 7,200 

 9,000 

 10, 600 

 12,300 

 13,900 



15, 400 



16, 900 

 18, 400 



1,390 

 1,870 

 2,360 

 2,850 

 3,310 

 3,760 

 4,210 

 4,650 

 5,070 

 5,450 

 5,810 

 6,150 



