24 BULLETIN 285, U. S. DEPARTMENT OF AGRICULTURE. 



Plot No. 8. — Age, 50 years; yield, 10.9 cords per acre; average height of dominant trees, 45 feet. 



Species. 



Propor- 

 tion 

 based on 

 volume. 



Number 

 of trees 

 per acre. 



Diameter breast- 

 high. 



Volume 



Average 



annua) 



Average. 



Ex- 

 tremes. 



per acre. 



growth 

 per acre. 





Per cent. 



76.4 



21.5 



1.3 



.8 



672 



272 



8 



8 



Inches. 

 3.4 

 2.8 

 4.0 

 3.0 



Inches. 



2 to 5 



2 to 5 



4 



3 



Cubicfeet.. 



709 



200 



12 



7 



Cubic feet. 

 14.18 





4 00 





.24 





14 







T otal 



100.0 



960 







928 



18 56 











Endeavor, Forest County, Pa.; altitude 1,200 feet; slope 5 per cent north; soil, shallow, rich, residual 

 c lay loam, over flat shale fragments; humus heavy, rich, well decomposed; plot one-eighth acre, in second- 

 growth stand of less than one-fourth acre; density 0.85; reproduction scant; scattered hemlock, white ash, 

 sugar and red maple, white oak and birch. 



Plot No. 9. — Age, 80 years; yield, 42.2 cords per acre; average height of dominant trees, 75 feet. 



Species. 



Propor- 

 tion 

 based on 

 volume. 



Number 

 of trees 

 per acre. 



Diameter breast- 

 high. 



Volume 

 per acre. 



Average 

 annual 



Average. 



Ex- 

 tremes. 



growth 

 per acre. 





Per cent. 



85.4 



8.2 



4.6 



.8 



.6 



.4 



324 

 32 



68 

 84 

 24 

 20 



Inches. 

 7.4 

 7.3 

 5.7 

 3.0 

 3.1 

 3 



Inches. 

 5 to 11 



Cubicfeet. 



3.062 



Cubic feet. 

 38.28 



Black birch 



5 to 10 296 

 1 to 9 164 



3.70 





2.05 



Beech 



lto 6 



lto 6 



3 



29 

 20 

 16 



.36 





.25 





.20 









Total 



100.0 



552 







3,587 



44. S4 











Homer Township, Potter County, Pa.; altitude 1,600 feet; slope 30 per cent west; soil very scant, rich, 

 fresh ? residual clay, over talus of flat shale fragments; humus heavy, moist, w y ell decomposed; plot one- 

 fourth acre, in similar stand of more than 10 acres; density 0.9; reproduction scant; beech, red maple, 

 hemlock. (See PI. X, fig. 1.) 



MAPLE PLOTS. 



New York. 



Plot No. 10. — Age, 39 years; yield, 28 cords per acre; average height of dominant trees, 6S feet. 



Species. 



Propor- 

 tion 

 based on 

 volume. 



Number 

 of trees 

 per acre. 



Diameter breast- 

 high. 



Volume 

 per acre. 



Average 

 annual 



Average. 



Ex- 

 tremes. 



growth 

 per acre. 



Sugar maple 



Per cent. 

 77.9 

 8.3 

 7.6 

 2.8 

 1.8 

 1.6 



712 

 56 

 32 

 16 

 32 

 8 



Inches. 

 4.4 

 5.1 

 6.3 

 5.5 

 3.3 

 6.0 



Inches. 

 1 to9 



4 to 6 

 5toS 



5 to 6 

 3 to 4 



6 



Cubicfeet. 

 1,852 

 198 

 1S1 

 66 

 42 

 39 



Cubicfeet. 

 47. 49 



Yellow birch 



4.64 



Service berry 



1.69 





1.08 



Basswood 



1.00 







Total 



100.0 



856 







2,378 



60.98 











Cooks Falls, Delaware County, N. Y.; altitude 1,300 feet; slope 1"> per • north; soil moist, 



sandy loam, relativi l; deep; humus l inch thick: plot one-eighth acre in similar stand ol 2or3acres; den- 

 sity i; reproduction, sugar maple and beech; maple very abundant but badly suppressed; an "old field" 

 stand of seedling origin. 



