b (English units) = 1.08100 + 0. 06263 (TD - 1.0) 



b (metric units) = 1.08100 + 0. 0246575 (TD - 2.54) 



D = basal diameter (at ground line) in inches for English units or 

 centimeters metric units 



H - total tree height in feet for English units or meters for metric units 



TD = minimum top diameter limit in inches for English units or centimeters 

 for metric units 



V - gross cubic volume outside bark to the specified minimum top diameter 



limit including stump and limbs in cubic feet for English units or cubic 

 meters for metric units. 



Figure 2 illustrates the juniper 1-in top diameter volume surface for single- 

 stemmed trees showing the means used for model development plotted and connected to 

 the surface by a vertical line. Note that more than 90 percent of the total data set 

 was less than 14 inches basal diameter. 



p 150 

 - 130 

 -110 _ 







2 6 10 14 18 22 26 30 

 BASAL DIAMETER (IN) 



Figure 2. — Juniper gross-aubia volume outside bark including stump and limbs to 1-inch 

 minimum top diameter limit for single stemmed trees showing differences between 

 observation means and corresponding predicted values. 



Figure 3 illustrates the top diameter effect for pinyon, and figure 4 illustrates 

 the top diameter effect for single- stemmed juniper. Figure 5 illustrates the number- 

 of-stems effect for juniper to a 1-in top diameter. 



7 



