306 APPENDIX 



meaning is prominent and where real forestry terms are involved, as in 



severance felling, felling cycle, felling series, felling plan, reserving cut 



and cutting where the common verbal sense is prominent, as in cutting 



height, cutting limit. 

 Cutting area. See Cutting. 

 Cutting height. See Stump height. 

 Cutting limit. See Diameter limit. 

 Cutting plan. See Felling plan. 

 Cutting series. See Felling series. 

 Cutting cycle. See Felling cycle. 



Damage cutting. See Salvage cutting or felling. New term. 

 Damping off. The succumbing of seedlings to a certain fungus disease. 

 Deforestation. A term used to indicate the denuding of a forest area. 



G., Entwaldung. F., deboisement. 

 Dendrometer. An instrument combining height and diameter measure. 



Capable of measuring from the ground diameters at any point. 

 Dense, a. See Crown density. 

 Density of crop. See Stock density. 

 Development class or stage. Similar to age class and tree classes. Mere 



descriptive words may be used instead of age and measurement to 



designate a stage of development of a stand: 

 Seedling stage or seedling growth, a stand of seedlings. 

 Thicket stage or brushwood, a stand of saplings. 

 Polewood stage, a stand of poles. 

 Young timber stage, a stand of standards. 

 Old timber stage, a stand of veterans. 

 Diameter breast-high. The diameter of a tree at 4^ feet above the 



ground. (Abbreviation, d. b. h.) The additional abbreviations o. b. 



and i. b. are used to designate whether the diameter is measured outside 



or inside the bark. 

 Diameter class. All trees of a stand whose breast-high diameters fall 



within prescribed limits, the intervals varying usually from i to 4 



inches, fractions being rounded off to the nearest full inch of the limit. 



The diameter classes may be stated by numbers of trees in each class 



on the unit of area or by the percentage of the total contents of the 



stand represented in each, or by area occupied, or in any other way. 



Diameter classes take the place of age classes in the selection forest. 

 G., Starkeklasse. F., categoric de grosseur. 



