Table 2. --Net volume of logging residues from saw log 

 operations as a percent of net product volume^ 

 Arizona and New Mexico 



Unit of measurement : 



and : Arizona 

 minimum top diameter : 



Cubic foot 12.20 12.18 12.19 



4 inches 



Board foot^ 5.27 6.36 5.70 



Variable 



Board foot^ 5.11 6.15 5.52 



7 inches 



New Mexico 



Arizona- 

 New Mexico 



1 International 1/4-inch rule. 



It should be pointed out that residue volumes 

 derived by the use of factors in table 2 are not 

 totally available for chipping. A more detailed and 

 intensive survey would be necessary to assess residue 

 characteristics and to determine what portion of these 

 residues could be used under prevailing market 

 conditions . 



DIAMETER CLASS REMOVALS 



Information on the number of growing stock trees 

 harvested or destroyed ^ in each diameter class is 

 essential for derivations of diameter class cutting 

 rates used in most stand-table projections of growth 

 and inventory. Reliable data of this kind usually are 

 difficult to obtain. However, logging residue surveys 

 provide means for estimating the distribution of trees 

 removed per unit volume of saw logs harvested. 



^Either occurrence removes the trees from 

 inventory . 



5 



