Figure 1 illustrates the pinyon 1-inch top diameter volume surface showing the 

 means used for model development plotted and connected to the surface by a vertical 

 line. Note that more than 95 percent of the total data set was less than 14 in basal 

 diameter. 



,- 150 

 130 

 110 



25 



20 



15 



h- 70 



50 



I- 30 



10 

 i- 



o 

 > 



BASAL DIAMETER (IN) 



Figure 1. — Pinyon gross cubic- foot volime outside hark including stump and limbs to 

 1-inch minimum top diameter limit showing differences between observation means and 

 corresponding predicted values. 



The juniper cubic volume equation is 



V 



G + a bXH 



where: 



o (English units) = 0.03066 



c (metric units) = 0.0008682 



^ 20.0 - STEMS 

 ^ 19.0 



n (English units) = 2.25 + 0.38130(TD - 1,0) 

 n (metric units) = 2.25 + 0. 15012 (TZ? - 2.54) 



X (English units) = 0.00491(0 - TD)^-^ + 1 . 50147E-08 (0 - 70)5.0 



X (metric units) = 0.0000852(0 - TO) ^ • ^ + 1 . 3194£'-11 (0 - 70)5*° 



STEMS = number of stems 3 in (7.62 cm) diameter and larger originating 

 within first 12 in (0.3 m) above ground line. Trees less than 

 3 in (7.62 cm) basal diameter are considered single stemmed. 



6 



