REFERENCES 373 



that of trees containing the average volume of the stand. It has been 

 found that the relation between dominant and average trees in height 

 growth is very consistent, and either basis furnishes an index to the 

 growth rate, which may be used later in classifying the plots on a basis 

 of site for the construction of yield tables. 



On account of its uniformity for a given site quality, average height 

 growth may be determined from the analysis of from five to twenty- 

 five average or dominant trees with very satisfactory results. 



References 



Relation between Spring Precipitation and Height Growth of Western Yellow Pine, 



G. A. Pearson, Journal of Forestry, Vol. XVI, 1918, p. 677. 

 Relation between Height Growth of Larch Seedlings and Weather Conditions, 



D. R. Brewster, Journal of Forestry, Vol. XVI, 1918, p. 861. 



