58 



BULLETIN 55, U. S. DEPARTMENT OF AGRICULTURE. 



Table 47. — Yield of balsam fir in Maine, based on 22 sample plots, covering an area 



of 6 acres. 



FLAT. 



Plot No. 



Age of 

 stand. 



Trees cut 

 per acre. 



Total 

 yield. 



Yield 



without 



bark. 



Merchantable volume. 



Mean 



annual 



increment 



per acre. 



1 



90 

 90 

 70 

 70 

 80 

 90 

 90 

 90 

 90 

 90 

 70 

 90 

 90 



152 

 144 

 160 

 100 

 168 

 200 

 160 

 132 

 136 

 86 

 144 

 120 

 168 



Cubicfeet. 

 2,395 

 2,763 

 2,543 

 1,357 

 2,937 

 3,739 

 3,010 

 2,936 

 2,789 

 1,408 

 2,811 

 2,115 

 2,689 



Cubicfeet. 

 2,156 

 2,501 

 2,268 

 1,212 

 2,614 

 3,364 

 2,674 

 2,627 

 2,473 

 1,261 

 2,435 

 1,896 

 2,388 



Cubicfeet. 

 2,149 

 2,460 

 2,330 

 1,239 

 2, 704 

 3,504 

 3,010 

 2,675 

 2,512 

 1.259 

 2,590 

 1,910 

 2,497 



Cords. 

 22.6 

 25.9 

 24.5 

 13.0 

 28.4 

 36.8 

 31.6 

 28.1 

 26.4 

 13.2 

 28.3 

 20.0 

 26.2 



cubicfeet. 

 26.6 



2 



30.7 



3::..:::... .:. 



36.3 



4 



19.4 





36.7 



6 



41.5 





33.4 



8 



32.6 



9 



31.0 



10 



15.6 



11 



40.1 



12 ... 



23.5 



13 



29.8 







Average 





144 



2.575 







25.0 



130.5 













HARDWOOD SLOPE. 



14 



90 

 80 

 80 

 80 

 90 

 90 

 80 

 100 

 90 



80 

 88 

 60 

 68 

 96 

 122 

 48 

 62 

 52 



1,666 

 1,-342 

 1,034 



963 



1,861 



' 2, 165 



534 

 1.170 

 1,226 



1,490 



1,214 



930 



868 

 1,668 

 1,945 



485 

 1,040 

 1,085 



1,547 



1,240 



957 



881 



1,683 



1,933 



480 



1,050 



1,112 



16.2 

 13.0 

 10.0 



9.2 

 17.7 

 20.3 



5.0 

 11.0 

 11.7 



18.5 



15 



16.8 



16 



12.9 



17 



12.0 



18 



20.6 



19 



24.0 



20 



6.6 



21 



11.7 



22 



13.6 







Average 





75 



1,329 







12.6 



2 15.2 













' Equals one-third cord. 2 Equals one-sixth cord. 



OVER LARGE AREAS. 



The figures iii Tables 46 and 47 represent the yield of carefully 

 selected small areas of balsam-fir stands. Over large areas, mcluding 

 all t37pes of land, the yield is much smaller. The results of measure- 

 ments of nearly 60,000 acres in three townships of Hamilton County, 

 N. Y., gave an average yield per acre for all types of coniferous lands 

 of 4.4 standards, or 1.5 cords (Table 48). 



