BALSAM FIE. 35 



Table 11. — Height growth of balsam fir in Maine, on the basis of age, based on 456 trees. 





Height of tree (feet). 



Aim.ual 

 growth 

 within 

 5-year 

 period 

 (feet). 



Age (years). 



Maxi- 

 mum. 



Mini- 

 mum. 



Aver- 

 age. 



15 



10 

 22 

 33 

 42 

 49 

 55 

 60 

 63 

 67 



6' 



7 

 8 

 10 

 12 

 14 

 16 

 18 



8 

 14 

 20 

 25 

 30 

 36 

 40 

 45 

 49 



0.5 

 1.2 

 1.2 

 1.0 

 1.0 

 1.0 

 1.0 

 1.0 

 .8 



20 



25... 



30 



35 



40 



45 



50 



55 







Height of tree (feet). 



Age (years). 



Maxi- 

 mum. 



Mini- 

 mum. 



Aver- 

 age. 



60 



69 



72 

 74 

 76 

 78 

 79 

 81 

 82 

 83 



21 

 24 

 27 

 31 

 35 

 38 

 41 

 45 

 48 



52 

 56 

 59 

 61 

 64 

 66 

 68 

 70 

 71 



65 



70.. 



75 . . 



80 



85 



90.. 



95 



100 





Annual 

 growth 

 within 

 5-year 

 period 

 (feet). 



0.7 

 .7 

 .6 

 .5 

 .5 

 .4 

 .4 

 .4 

 .2 



Table 12 shows the relation between the height and diameter 

 growth for all types together in New York, Maine, New Hampshire, 

 and Minnesota. 



Table 12. — Comparative height growth of balsam fir in different States, on the basis of 



diameter breast high. 





Height of tree (feet). 



Diameter breast high (inches). 



New York.i 



Maine. 2 



New 

 Hampshire.3 



Minnesota.^ 



1 



9 

 17 

 26 

 33 



40 

 46 

 51 

 54 

 58 

 60 

 63 

 65 

 67 

 70 

 72 

 74 

 76 



12 



20 



27 



35 



42 



48 



54 



60 



64 



68 



72 



75 



78 



81- 



84 



86 



15 

 24 

 31 

 37 

 42 

 46 

 50 

 53 

 56 

 59 

 61 

 63 

 65 

 67 

 69 

 70 

 72 



8 



2 



16 



3 



23 



4 



31 



5 



37 



6 



43 



7 



48 



8 



53 



9 



58 



10 



62 



11 



67 



12 





13 





14 





15 





16 





17 











1 All types, based on 1,138 trees. 

 * All types, based on 456 trees. 



3 All types, based on 326 trees. 

 * All types, based on 165 trees. 



These figures indicate again that the tree reaches its best develop- 

 ment in Maine and its next best in New York. Growth in Minnesota, 

 though apparently more rapid than in New Hampshire or New York, 

 on the whole is poorer than in any other State. The actual number 

 of trees on which the figures for Minnesota are based is not large, while 

 the figures for height growth in New Hampshire are based not on 

 actual measurements of felled trees but on those of standing trees by 

 means of a height measurer. If the measurements in the two States 

 had been taken in the same way and on the same number of trees, 

 the difference in favor of Minnesota would have been eliminated. 



