308 APPENDIX 



stands, age differences should not be more than 10 or 20 years; in 

 mature stands, not more than 30 or 40 years. 



G., gleichalteriger Bestand. F., peuplement uniform. 



Expectation value. See Value. 



Exposure. See Aspect. 



Factors of locality. See Site. 



Fail spot or place. A place where natural or artificial reproduction has 

 failed. 



G., Fehlstelle. F., vide. 



Felling. Syn. : cutting. The term felling is preferred by the collating 

 committee for its better term quality, especially where substantive 

 meaning is prominent. See under Cutting. 



Felling age. See Rotation. 



Felling area. An area on which the trees have been cut or are to be 

 cut. 



Felling budget. See Cut. 



Felling cycle. The planned interval between fellings or cuts on the same 

 forest area. See also Reproduction, Selection method. 

 Syn. : period of return. 



Felling plan. See under Working plan. 



Felling series. An aggregation of stands into a proposed or actual 

 sequence of felling areas, the object being a distribution of felling areas 

 for administrative reasons or to secure a final satisfactory distribution 

 or location of age classes, especially to avoid damage by windfall and 

 insects due to uniformity of stand and size of felling area. It is 

 intended to interrupt a regular sequence of age classes. 

 Syn. : cutting series. 

 G., Hiebszug. F., serie de coupes. 



Final cutting. See Reproduction, Shelterwood method. 



Final yield. See Yield. 



Financial maturity. See Maturity. 



Financial rotation. See Rotation. 



First growth. See Old growth. 



Forest, n. In common usage, a large tract of land covered with trees; 

 more exactly, a tract of land, more or less extensive, covered more or 

 less densely with trees of useful character, viewed from the standpoint 

 of economic use and development. A species of woodland or woods, 

 which is the generic term for the wooded condition of the land. 



