159 



Age at Average Maximum 



Age at Average Maximum 



Stump. 



D. 1. B. 



D. I. B 



20 



2.5 



3.0 



40 



5.0 



5.S 



60 



7.0 



8.0 



80 



10.0 



11.9 



100 



12.4 



15.0 



120 



15.0 



18.2 



Stump. 



D. 1. B. 



D. I. L 



140 



18.0 



21.5 



160 



21.0 



25.0 



180 



24.4 



28.8 



200 



28.0 



32.5 



220 



31.4 



36.4 



240 . 



35.2 



40.6 



It will be noticed that there is a difference of approximately 20 per cent, 

 in diameter for any given age, between the average maximum growth and 

 the average growth. Allowing for a proportionate increase throughout tho 

 stem, this would give a maximum volume for table three as follows: 





Volume 





Volume 





Volume 



Age 



B. M. 



Age 



B. M. 



Age 



B. M. 



^ears. 



(Maxi- 



Years. 



(Maxi- 



Years. 



(Maxi- 





mum) . 





mum). 





mum) a 



70 



12 



130 



205 



190 



642 



80 



18 



140 



270 



200 



756 



90 



48 



150 



330 



210 



870 



100 



78 



160 



402 



220 



996 



110 



120 



170 



486 



230 



1,146 



120 



168 



180 



552 



240 



1,314 



This 20 per cent, increase could hardly be regarded as reliable, how- 

 ever, when applied to later life of the tree. Artificial plantations both at 

 home and abroad show that it is not at all out of proportion with what may 

 be expected during the early life of well managed plantations. 



A study of the crowns of this plot showed the average width of crown 

 to be forty feet. This would allow in a fully stocked stand, about forty mature 

 trees to the acre. During the extremely early years of the stand, an acr« 

 would bear upwards of one thousand trees. *Mr. Earl Frothingham, Forest, 

 Assistant in the Forest Service, shows that from observed plots an acre in 

 able to support seven hundred and twenty-four oak trees to the age of forty- 



*Second Growth Hardwoods in Connecticut 

 by Earl H. Frothingham. Forest Assistant. 



Bulletin 96, II. S. Forest Service 



