INTRODUCTION 



The tree volume tables presented here were computed from volume equations developed 

 for the major tree species on five National Forests in New Mexico and Arizona (table A) . 

 The equations and the methodology used to derive them can be found in the companion 

 publication, "Comprehensive tree volume equations for major species of New Mexico and 

 Arizona: I. Results and methodology." 



For each species and National Forest combination, tables for the following un- 

 forked tree volumes are given: 



1. Total stem gross cubic foot volume 



2. Total stem net cubic foot volume 



3. Gross merchantable cubic foot volume to a top diameter inside bark (d.i.b.) of 

 4 inches 



4. Net merchantable cubic foot volume to a top d.i.b. of 4 inches 



5. Gross merchantable cubic foot volume to a top d.i.b. of 6 inches 



6. Net merchantable cubic foot volume to a top d.i.b. of 6 inches 



7. Gross International 1/4-inch board foot volume to a top d.i.b. of 6 inches 



8. Net International 1/4-inch board foot volume to a top d.i.b. of 6 inches 



9. Gross Scribner board foot volume to a top d.i.b. of 6 inches 

 10. Net Scribner board foot volume to a top d.i.b. of 6 inches. 



The two variables necessary to use these tables are diameter at breast height 

 (d.b.h.) and total tree height. Also presented in the tables are the number of trees, 

 by diameter class and by height class, that were used in the development of the equa- 

 tions. It should be noted that, with the exception of total stem cubic foot volume 

 tables, tree counts across diameter classes will not necessarily add to the tree counts 

 across height classes. This apparent discrepancy arises because the tables begin with 

 that diameter class that is one class larger than the merchantable top diameter. Be- 

 cause some of the trees used in developing the equations had a diameter smaller than 

 this diameter class, they were eliminated from the tree counts. 



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