38 



MISC. PUBLICATION 11, U. S. DEPT. OF AGRICULTURE 



Table 4. — Stock taMe 

 [Derived from Tables 2 and 3] 

 Average acre cut-over land, western yellow pine, Black Hills, S. Dak. 





Volume per acre 





D. b. h. 



Known 



Predicted i 



Volume 

 per tree 





Time of 

 cutting 



10 yeais 

 after cut- 

 ting 



20 years 

 after cut- 

 ting 



30 years 

 after cut- 

 ting 



35 years 

 after cut- 

 ting 



Inches 

 10 



Board feet 

 597. 85 

 688.50 

 581. 00 

 422. 50 

 232. 50 

 105.40 

 216. 20 



60."80" 



Board feet 

 701. 25 

 815. 25 

 881.00 

 702. 50 

 494.45 

 285. 00 

 128.80 

 258. 50 



Board feet 

 773.3 

 956.2 

 1, 087. 

 1, 102. 5 

 871.1 

 606.1 

 345.0 

 154.0 

 300.8 



Board feet 



907. 50 



1, 054. 50 



1, 275. 00 



1, 358. 75 



1,365.55 



1,067.80 



733. 70 



412. 50 



179. 20 



Board feet 



876. 70 



1, 146. 00 



1, 340. 00 



1, 476. 25 



1, 525. 20 



1,369.90 



1, 014. 30 



643. 50 



S29. fin 



Board feet 

 50 



11 



75 



12 



13.. 



14 ._.—.. 



15 



16 



17 



18 . 



100 

 125 

 155 

 190 

 230 

 275 

 320 



19 



71.25 



352.50 1 281.25 



375 



20 



82.6 





204. 45 

 45.00 

 57.00 



435 



21 , 



95.00 



500 



22 ! 





570 















Total 



2,905.75 



4,338.00 



6,278.6 



8,802.00 1 10,309.15 













49.2 



116. 07 



202. 9 254. 78 















1 On basis of number of trees per acre and average volume per tiee. 

 Table 5. — Volume increment per acre per annum for stand left after cutting^ 



D. b. h. 



After cutting 



Trees 

 per acre 



Volume 

 increment 



At time of cutting 



Trees 

 per acre 



Volume 



increment 



before 



cutting » 



Inches 



Number 



Cubic feet 



8.62 



12.94 



12.94 



17.44 



15.37 



16.50 



14.06 



12.75 



10.87 



8.81 



5.62 



3.19 



1.50 



.56 



.94 



0. 1724 

 0. 3882 

 0.6470 

 1. 3080 



1. 6138 



2. 3925 



2. 9526 



3. 5700 

 4. 0219 

 4.0526 

 3. 0910 

 2. 0735 

 1. 1325 

 0. 4816 

 0. 9118 



Number 

 8.62 

 12.94 

 12.94 

 17.44 

 15.37 

 16.50 

 14.06 

 12.75 



10.87 

 8.81 

 5.62 

 3.19 

 1.50 

 .56 



Cubic feet 



0, 0872 

 .2305 

 .363 

 .4499 

 .6375 



1.087 

 1. 2334 

 1. 0959 

 .8294 

 .5025 

 .238 

 .4860 



1358 



19 



0.228 



Total. 



142.3 



29. 0374 



142.3 



7. 3761 



1 From Johnson's preliminary report, "Black Hills yellow pine, eflect of thinnings." P. 4a. 



> The volume increment in this computation is based on the diameter of the trees as they existed at the 

 time of cutting as derived from the table showing diameter accretion. In this case the 4, 5, and 6 inch 

 diameter classes would be 1, 2, and 3 inches and show no volume since cubic increment was not secured 

 for trees less than 4 inches d. b. h. In the last column, only increment on the trees left in cutting is 

 considered. 



