76 JOURNAL OF FORESTRY 



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., d^boisement. 

 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 descrip- 

 tive 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 seedHngs. 

 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 i}4 feet above the ground. (Abbre- 

 viation, 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 1 to 4 inches, fractions being 

 rounded off to the nearest full inch of the Hmit. 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. 

 Distribution of diameter classes. In its strict sense, the location and area of each 

 stand of a given diameter class in the forest; in a general sense, the per cent of area 

 occupied by each diameter class in the stand. 

 Diameter growth. See Increment. 



Diameter lunit. The smallest (and occasionally largest) size to which trees or logs 

 are to be measured, cut, or used. The points to which the limit usually refers are 

 stump, breast-height, or top. 

 Diameter tape. A tape from which the diameter may be read directly when it is 



placed around the tree. 

 Dibble, n. A tool for making holes for planting seeds or young trees. 



G., Setzpfahl. F., plantoir. 

 Dibble in, v. To plant seeds or young trees in holes made with a dibble. 

 Die hammer. See Marking hammer. 



Direct seeding. A method of establishing a forest artificially by sowing seeds on 

 the area to be forested. 



Broadcast seeding method is an application of direct seeding in which seeds are 

 sown over the entire area to be forested. 



Partial seeding may be done in strips, furrows or trenches, plats or spots {see 

 Seed spot.) 



G.. Saeen, Saat. F., ensemencement, semis. 



