Check scale--off ice work (contQ 



Important steps in the operation Key points 



2o Estimate ratio of cost of Based on experience or best estimate, 



check scaling to cost of tree See page 21 of this publication* Same 

 measuring a tree, ratio used in step 5 under "Prelimi- 



nary office work." 



So Determine number of trees 



needed in check scale sample . 



a. DeterFiine yatln nf nnrnhPT* 

 of check scale trees to 

 number of trees in first 

 sample, (2). 



b. Multiply number of trees 

 in first sample by ratio 

 (a) above to get number 

 of trees needed in check 

 scale sample. 



ITsine' correlation coefficient (Nn. 1 

 above), and cost ratio (No. 2 above). 

 Refer to Figure 3,, page 23 of this 

 publication, or formula in Appendix 



IXc 



Check scale — field work 



Important steps In the operation 



Key points 



lo Locate felled and bucked 

 sample tree. 



By conspicuous markings. Identifi- 

 cation by tags or keel number. 



2. Scale logs In tree. 



Carefully and accurately. See job 

 breakdoTO for scaling. If log ends 

 are not exposed, use calipers or a 

 diameter tape whichever Is more 

 practicabloj then deduct for double 

 bark thickness. Deduct for defect 

 and breakage. 



3o Record tree number, species, 

 log length and gross and net 

 voluiue by logs . 





4. Add up net volume cf Indivi- 

 dual logs to give net tree 

 volume o 





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