32 



BULLETIN 234, IT. S. DEPARTMENT OF AGEICULTUEE. 



CUTTINGS OX OTHER NATIONAL FORESTS. 



In a selection cutting of lodgepole pine on the Medicine Bow Na- 

 tional Forest 36 per cent of the original board-foot volume of the 

 stand was removed. In a similar cutting on the Arapahoe National 

 Forest 40 per cent of the original volume was taken. The marking 

 in these cases was considerably lighter than at French Gulch, due to 

 the greater exposure of the timber on the Medicine Bow and to the 

 greater accessibility of that on the Arapahoe. The marking on 

 22 representative acres on the Bighorn National Forest in Wyoming, 

 in the summer of 1913 provided for the removal of approximately 

 58.5 per cent of the board-foot volume. Table 15 shows by diameter 

 classes the number of trees and the volume in board feet removed 

 and left on an average acre in the operations on the Medicine Bow 

 National Forest. 



Table 16. — Number of trees and volume in board feet removed and left on an average 

 acre in selection cuttings on the Medicine Bow National Forest, Wyo. 



[Based on 97 measured acres.] 



Diame- 





Trees cut 



per acre. 





Trees left 



per acre. 















ter 

 breast 



Living. 



Dead. 



Living. 



high. 





























Number. 



Volume. 



Number. 



Volume. 



Number. 



Volume. 



Inches. 





Boardft. 





Boardft. 





Boardft. 



7 



0.71 



9 



2.18 



26 



38.70 



464 



8 



.94 



23 



2.19 



55 



37.50 



932 



9 



1.50 



63 



1.54 



65 



31.05 



1,304 



10 



3.03 



194 



1.61 



103 



23.95 



1,531 



11 



2.70 



230 



1.27 



108 



15.44 



1, 312 



12 



6.76 



710 



.89 



93 



9.60 



1,007 



13 



5.36 



705 



.77 



98 



6.47 



821 



14 



5.04 



776 



.38 



59 



4.71 



726 



15 



2.53 



462 



.29 



53 



2.27 



412 



16 



2.10 



439 



.11 



24 



1.49 



312 



17 



1.14 



275 



.20 



47 



. 10 



181 



18 



.74 



205 



.05 



14 



.37 



102 



19 



.41 



127 



.05 



16 



.14 



44 



20 



.21 



70 



.05 



11 



.06 



21 



21 



.06 



24 



.01 



4 



.06 



24 



22 

 23 

 24 

 25 

 26 

 28 

 30 

 31 

 34 



Total.. 



ooooo 



31 



15 

 5 



23 

 6 







.04 



18 



.01 



5 



.03 



16 











.01 

 .01 



6 



7 







.01 

 .01 

 .01 



8 

 9 

 12 





























33.62 



4,421 



11.58 



781 



172.45 



9,240 



BRUSH DISPOSAL. 



The object of brush disposal is to leave the cutover area in the 

 best condition to insure reproduction and to protect it from fire and 

 fungi. Brush left scattered haphazard over an area will permit of 

 abundant reproduction, except where the debris is especially deep. 

 Brush piled in windrows prevents reproduction upon the spaces they 

 cover, though reproduction will be secured in the spaces between 



