52 



SECOND-GROWTH HAEDWOODS IN CONNECTICUT. 



Table 36 shows the number of trees removed and the yield in 

 cubic feet secured in four actual thinnings. In each case all the mer- 

 chantable dead wcod was removed, but in the third example a pre- 

 vious cutting had taken most of the dead trees. The yield in cubic 

 feet can be reduced approximately to cords by dividing by 80. The 

 average amount of merchantable dead wood obtainable from pre- 

 viously unthinned stands of various ages can be obtained from Tables 

 17 to 25 by deducting the yield in living wood from that in living and 

 merchantable dead wood. 



Table 36. — Number of trees and volume of wood per acre removed in thinning four 



stands, by crown classes. 



NUMBER OF TREES REMOVED PER ACRE. 





Age- 

 years. 



Total. 



Dominant. 



Codominant. 



Intermediate. 



Overtopped. 



Dead; 



Type. 



Re- 

 moved. 



Left. 



Re- 

 moved. 



Left. 



Re- 

 moved. 



Left. 



Re- 

 moved. 



Left. 



Re- 

 moved. 



Left. 



re- 

 moved. 



Chestnut: 



Quality III.. 

 Do 



Quality II... 

 Oak: 



Quality III.. 



25-30 



45 

 45 



46 



384 

 432 

 120 



372 



316 

 216 



252 



352 



8 

 4 



16 



104 

 124 

 148 



184 



28 

 56 

 16 



16 



92 

 52 

 80 



84 



108 

 40 

 56 



68 



88 

 20 



68 



172 

 124 

 44 



140 



32 

 20 

 20 



16 



68 



208 



8 



132 



VOLUME OF WOOD REMOVED PER ACRE. 





Age- 

 Years. 











Proportion of amount removed. 



Type. 



Total re- 

 moved. 



Total left. 



Domi- 

 nant. 



Codom- 

 inant. 



Inter- 

 medi- 

 ate. 



Over- 

 topped. 



Dead. 



Total. 





Cubic 

 feet, 



Per 

 cent. 



Cubic 

 feet. 



Per 

 cent. 



Per 



cent. 



Per 



cent. 



Per 



cent. 



Per 

 cent. 



Per 

 cent. 



Per 

 cent. 



Chestnut: 



Quality III.. 

 Do 



Quality II... 

 Oak: 



Quality III.. 



25-30 



45 

 45 



46 



428 



1,243 



682 



553 



30 

 38 

 18 



28 



1,008 

 2,036 

 3,135 



1,404 



70 



62 

 82 



72 



14 

 2 



11 



24 

 29 

 22 



10 



31 

 15 



57 



24 



24 

 16 

 17 



21 



7 



38 



4 



34 



100 

 100 

 100 



100 



RESULTS OF THINNINGS. 



There are many even-aged stands in Connecticut which have not 

 been cut clear, but from which many of the larger trees have been 

 removed for poles or ties. These stands sometimes show to a re- 

 markable degree the effect of increased light in stimulating the 

 growth of the trees left. In a 46-year-old quality I chestnut stand, 

 examined in the course of the study, a heavy cutting for ties had been 

 made 14 years before, when the stand was 32 years old. All trees 

 over 10 inches in diameter which would make a tie were removed, and 

 the rest of the stand left. At the time of the examination the larger 

 trees of the stand, now 46 years old, had just been cut for poles. 



