28 



BULLETIN 299, U. S. DEPARTMENT OF AGRICULTURE. 



age rate of growth in diameter and height nearly equal to that of fast 

 growth under natural forest conditions. 



Table 8 shows the rate of growth of white ash under less favorable 

 conditions in southern Indiana. 



Table 8 — Rate of growth of white ash on fair upland clay soil in southern Indiana, based 

 on 81 trees 62 to 152 years old. 1 



Age. 



Fast growth. 



Average growth. 



Diameter 





Diameter 







breast- 



Height. 



breast- 



Height. 





high. 





high. 





Years. 



Inches. 



Feet. 



Inches. 



Feet. 



10 



1.1 



19 



0.6 



8 



20 



2.5 



34 



1.6 



17 



30 



4.1 



45 



2.5 



26 



40 



5.9 



54 



3.5 



34 



50 



8.2 



62 



4.6 



41 



60 



10.9 



68 



6.0 



47 



70 



14.4 



73 



7.9 



52 



80 



18.4 



78 



10.3 



57 



90 



■ 22.8 



82 



13.2 



61 



1 The acceleration in growth at about 50 years is due to a thinning of the forest. Measurements taken by 

 W. Stone in 1909. 



Table 9 shows the rate of growth of white ash in natural selection 

 forests containing trees of all ages. 



Table 9.- — Rate of growth of white ash in natural selection forests, based on 179 trees 77 

 to SOS years in age, east of the Mississippi River, from Tennessee north. 



Age. 



Diameter breast-high. 



Height. 















Maxi- 



Average 



Fast 



Average 



Fast 





mum. 



growth . 



growth. 



growth. 



growth. 



Years. 



Inches. 



Inches. 



Inches. 



Feet. 



Fat. 



10 



2.7 



0.6 



1.6 



S 



■ 11 



20 



6.7 



1.8 



' 3.9 



14 



21 



30 



11.4 



3.1 



6.8 



21 



32 



40 



16.5 



4.4 



10.1 



27 



44 



50 



20.7 



6.0 



13.6 



35 



OO 



60 



24.3 



7.7 



16.9 



43 



65 



70 



27.4 



9.5 



19.8 



52 



73 



80 



30.1 



11.4 



22.5 



60 



SO 



90 



32.3 



13.2 



24.9 



67 



86 



100 



34.3 



14.9 



27.1 



74 



91 



110 



36.1 



16.7 



29.1 



80 



95 



120 

 130 

 140 

 150 

 160 

 170 

 180 

 190 

 200 

 210 

 220 

 230 

 210 

 250 





18.2 

 19.8 

 21.2 

 22.7 

 24.0 

 25.4 

 26.8 

 2S. 1 

 29.4 

 30.7 

 31.9 

 33. 1 

 34.3 

 35.5 



30.9 

 32.6 

 34.2 

 35.7 



85 

 90 

 94 

 98 

 101 

 104 

 106 

 109 

 111 

 113 

 114 

 116 

 IIS 

 119 



100 

 103 

 108 

 111 





































































It will be seen by comparison with Table 7 that the growth is con- 

 siderably slower than that of comparatively even-aged second-growth 

 with better light conditions. The fast growth in Table 9 about repre- 

 sents the possibilities under proper management. 



