7. 



TENDING. Generally, any operation carried out for the benefit of 

 a forest crop, at any stage of its life e.g. cleaning, 

 thinning, pruning, girdling, but not regeneration fellings, 

 (BCFT) 



THINNING. A cut made in an immature stand, usually past the sap- 

 ling stage , for the purpose of stimulating the growth and 

 improving the quality of the stand without permanently 

 breaking the canopy. (BCFT modified) (See Appendix.) 



UNDERSTOREY. Trees with crowns under the main canopy.* 



VOLUME, GROSS TOTAL. The total tree volume, inside bark, includ- 

 ing top and stump with no deduction for defect, but 

 excluding all limbwood.* 



VOLUME, GROSS MERCHANTABLE. The volume remaining after the vol- 

 ume of tops and stumps is deducted from the gross total 

 volume, with no deduction for defect. 



VOLUME, NET MERCHANTABLE. The volume remaining after the deduc- 

 tions for defect are subtracted from the gross merchant- 

 able volume .* 



WORKING CIRCLE. A division of a management unit for a specific 



reason which requires a calculation and allocation of the 

 allowable cut separate from the calculation for the remain- 

 der of the management unit.* 



WORKING GROUP. An aggregate of stands, including potential forest 

 areas assigned to this category, having the same predom- 

 inant species, and managed under the same rotation and 

 broad silvicultural system.* 



