elm, yellow poplar, red oak, catalpa, white ash, white oak, black walnut, 

 Russian mulberry, basswood, osage orange, chestnut, and hickory. 

 However, a large part of the differences in growth is undoubtedly due 

 to soil variations rather than to inherent differences of the species 

 themselves. In determining the above order, the growth made by the 

 best stand of each species was used. Red oak furnishes an illustration 

 of the variability in soils. Several stands of this species of nearly 

 the same age are located on various parts of the area. In these stands, 

 the average annual height growth for the whole life of each one ranges 

 from 0.43 of a foot to 0.92. 



The details of the growth made by each stand up to the time of the 

 last measurement (complete measurements are made at five-year inter- 

 vals) are shown in the following table: 



Species 



Scotch pine 



Scotch pine 



White pine 



White pine 



Austrian pine 



Douglas fir 



W. yellow pine.. . 

 W. yellow pine... 

 Norway spruce . . 



Cottonwood 



Sugar maple 



Sugar maple 



Box elder 



Box elder 



White elm 



Yellow poplar. .. 



Red oak 



Red oak 



Red oak 



Red oak 



Red oak 



Red oak 



Red oak 



Red oak 



Red oak 



Catalpa 



Catalpa ... 

 Catalpa . . 

 White ash 

 White ash 

 White ash 

 White oak 

 White oak 



White oak 



Black walnut 



Black walnut 



Black walnut 



Russian malberry 



Basswood 



Osage orange 



Chestnut 



Hickory 



17 

 14 

 17 

 17 

 14 

 14 

 11 

 14 

 15 



5 

 12 

 12 

 12 

 12 

 12 

 14 

 14 

 12 

 12 

 12 

 12 

 12 

 13 

 13 

 12 

 14 

 13 

 15 

 12 

 14 

 13 

 13 

 11 

 14 

 11 

 14 



8 



13 

 13 

 15 

 14 

 10 



a Now mixed with P. ponderosa. b Mixed with white pine, c Seed spot in fall, d Seed 

 spot in spring, e Seed spot in spring, f Seed spot in spring, g Mixed with Scotch pine, 

 b Seed spot in fall, i Seed spot in spring. 



