30 



BULLETIN 299, U. S. DEPARTMENT OF AGRICULTURE. 



Table 12. — Rate of growth of green ash 1 on river bottom land, Mississippi County, 

 Arkansas, based on 394 trees 20 to 160 years old. 



Age. 



Fast growth. 



Average growth. 



Diameter 

 breast- 

 high. 



Height. 



Diameter 

 breast- 

 high. 



Height. 



Years. 



10 



20 



30 



40 



50 



60 



70 



80 



90 



100 



110 



120 



130 



140 



150 



160 



Inches. 

 4.0 

 7.8 

 11.4 

 14.6 

 17.4 

 19.9 

 22.1 

 24.2 

 26.2 

 28.1 

 29.9 

 31.7 



Feet. 



Inches. 



2.1 



2.9 



7.4 



9.7 



11.7 



13.5 



15.3 



17.0 



18.6 



20.1 



21.7 



23.1 



Feet. 



14 



31 



45 



57 



67 



76 



85 



92 



99 



105 



111 



117 



122 



126 



130 



134 



















































1 Measurements taken by G. M. Homans, 1905. 



In growing green ash under management it should be possible to 

 secure an average rate of growth on bottom lands well above the aver- 

 age for growth under natural conditions, but hardly as rapid as the 

 figures for fast growth given in Tables 10 and 12. 



On uplands, and farther north and west, the rate of growth of 

 green ash is considerably slower. A green ash plantation on good 

 prairie soil in central Illinois shows an average rate of growth under 

 management no greater than that under natural conditions on south- 

 ern bottom lands, and in Iowa the growth is still slower. The per 

 acre yield will always be greatest on the well-drained, moist bottom 

 lands of the South, where the greatest density of stand is possible. 



Farther west the possibilities of growth are constantly less. The 

 rate of growth in upland plantations in eastern Nebraska is consid- 

 erably slower than the average for natural bottom land growth in 

 the East. 



Table 13. — Diameter and height growth of green ash 1 in eastern Nebraska in upland 

 plantations, diameter growth based on 57 trees and height on 216 trees. 



Age. 



Average. 



Dominant. 



Height. 



Years. 



Inches. 



Inches. 



Feet. 



5 



10 

 15 



1.1 



2.1 

 2.9 





11 

 19 

 24 





3.3 



20 



3.6 



4.5 



28 



25 



4.4 



5.6 



32 



30 



5.0 



6.5 



36 



35 



5.3 



7.1 



38 



40 



5.4 



7.5 



40 



45 

 50 



5.5 



5.6 





41 

 43 







1 Measurements taken by F. G. Miller, 1905. 



