38 



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



Table 4. — Stock inhlv 

 (Derived from Tables 2 and 3) 

 Average acre cut-over laud, westero ycUow pine. Block Ilills, S. Dak. 



' On basis of number of trees per acre and average volume per tiec. 

 Table 5. — Volume increment per acre per ininutn for stand left after cutting' 



1.. 



2.. 

 3.. 

 4.. 

 5.. 

 6.. 

 7.. 

 8.. 

 0.. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 l«. 

 17. 

 18. 

 10. 

 20. 



D. b. h. 



Inches 



After cutting 



.\t time of cutting 



Trees 

 per acre 



Volume 

 increment 



Number ' Cubic feet 



.1358 



0.228 



Total. 



142.8 



20.0374 



14Z8 



7.3781 



' From John.son's preliminary report, "Black Hills yellow pine, effect of thinning.s." P. 4a. 



' The volume incroment In thi.s computation is ba-scd 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. 



