: 
; 

14 WESTERN YELLOW PINE IN ARIZONA AND NEW MEXICO. 
BUTT AND TOP TAPER. 
Table 4 gives separately for yellow pine and blackjack the taper 
in inches of the butt of a tree from 1 to 5 inches from the ground. 
In addition the table gives the reducing factor used to determine the 
breast-high diameter of a tree from the diameter of a stump 18 inches 
in height. The proper breast-high reducing factor for stumps of 
any height can be secured from the other figures of the table. 
Taste 4.—Butt taper and reducing factor of yellow pine and blackjack, 1 to ) 9) 
feet from ground by 6-inch classes.’ 



Distance from ground in feet. Breast-high 
diameter 
reducing fac- 
torforstump 
1to2 2 to3 3 to 4 4to5 18 inches in 
Breast-high diame- height. 
ter, class. 
Inches outside bark. 
Yellow | Black- | Yellow] Black-| Yellow| Black- | Yellow} Black-| Yellow | Black 
pine. | jack. | pine. | jack. | pine. | jack. | pine. | jack. pine. | jack. 









Inches 
Re Rear ENE yop 0.6 0.8 0.5 0.5 0.3 0.3 0.2 0.2 1L.@) 1.0 
T/A Ste Aaa NN Seba 1.0 1.2 SU -8 .4 .4 a, 38 13 1.5 
D0) heats wean beeen 15% Mee 1S 76 .8 .8 .6 -6 4 US 7E 1.8 
Tae etek Renee gar BORE aS 8 2.0 malt 1.0 Tigal SU -8 a5 .4 D2, 2.3 
OS Me 3 See ie a PRAT aes Sac VA Tal ho) a See QV RG saad Pe fp eee 28s ae 
3 8o Gaeta Seen ya te ES Sul artes oe gOS Fal ee a ec ALE OE eee 28s) ene Shel LG Sees 


1 Based on 404 yellow pine and 200 blackjack on Zuni, Jemez, and Datil Forests. 
In deciding between different top-diameter limits it is essential 
to know the average tapers of the top log. These are given in Table 
5. According to the top taper as given for the Zuni Forest, the 
lumberman may choose between cutting a 16-foot yellow-pine log 
6.9 inches at the small end, scaling 20 feet, or a 12-foot log 8.5 inches 
at the small end, also scaling 20 feet. Similarly, the table can be 
used to determine the differences in scale by cutting to different 
limits. Where the volume of scale is the same, the problem of what 
top limit should be used resolves itself into a question of manu- 
facture. 
TABLE 5.—Top taper of yellow pine and blackjack 2 to 8 feet from merchantable 
limit. 


Distance from merchantable limit, in feet. 

0 | 2 | 4 | 6 | 8 Variety. 


Jemez: Forest sie 22 ee ee eee ee 8.4 10.3 2 11.0 12.8 
au Oreste SE Re ers Serer et Se Loa 6.9 7.8 8.5 9.2 10.0 \Yellow pine 
emeZ Forests a5 5 See ese ae eer igen eee 7 9.4 10.0 10.8 
ZMH OLS G 5) Soo Bese ee Oe eet eee eee a 6.9 G36 8.4 9.0 9.8 \Blackjack. 









