FORKST DESCRIPTIONS 



47 



[Etc. for 100 spaces] 



Abbreviations. ■—Dis,. = Distribution; CI. = Clumps; Ev. = Evenlj; 



G. = Good; P. = Poor. 



Note: — Space is allowed on the form for four species; often several species of 

 similar habits may be grouped together. The gain or loss under "what will 

 happen, etc.." is observed in terms of relative number of stems, not by volume. 

 The cause of gain or loss may be growth, death through shade, or old age, 

 etc. This is a most important feature of the silvical description. 



The species selected are the species that make up the stand. Space 

 is prepared for ten trees. The individual trees selected are representa- 

 tive of the trees of the stand; generally average trees of the main 

 stand are selected. Thus, heights of trees are obtained; and this infor- 

 mation is valuable not only in determining what volume tables should 

 be applied (in case log lengths are not to be obtained by the estimator) 

 to obtain volume of stand, but also the position of the tree in the stand 

 and often the quality of site. For example, in mixed, even-aged stands 

 of yellow birch (TO years old), paper birch, red maple, and bird 

 cherry and red spruce, on this form can be shown the height and age 

 of the individual species, e.g., paper birch, and red maple the tallest, 

 yellow birch and bird cherry next, and the spruce as subordinate, all 

 the same age. Other columns give merchantable height (M.H.) 

 diameter inside back at merchantable height (d.i.b. M.H.) and 



Schneider's formula for growth per cent 



400 

 N.D. 



and these data 



