24 



FOREST COMMISSIONER S REPORT. 



Spruce on Slow-Growing Spruce Land. Land Flat and Poorly Drained^ 

 Rocky, with very Little Mineral Soil. Deeply Mossed. 



Computed Results. 





- i.P 



« c c 



Growth Last 

 Ten Years. 



u 

 o 





S 3J 



C O) O ; 



1— o o.; 





p o 

 z > 



Same Evened by Drawing Curves 

 for Volume and Per Cent. 





Growth Last 

 Ten Years. 





>= I 



c 3 c 2 

 1-^ o w.S 



P, 



6sbS 





8 

 9 

 10 

 11 

 12 

 13 

 14 



5 



7.4 

 10.2 

 12.4 

 16.5 

 19.0 

 2.3 

 28.6 



1 



.9.5 



.9 



.97 



.8 



.97 



.9 



.65 



5 



7.5 

 10.5 

 13.5 

 10. 5 

 19.5 

 23 

 27 



.95 

 .97 

 .96 

 .93 

 .88 

 .8-2 

 .75 



3.25 



2.9 



2.. 55 



2.2 



1.9 



1.65 



1.4 



.24 

 .30 

 .34 

 .36 

 .37 

 .38 

 •38 



Eiglity-tliree trees observed in all, on Hobbstown, No. IV, R. VII and No. 

 I, R XIV. Average height above sea about 1,400 feet. 



Exaraine uow the companioa tables, for spruce land of best and of 

 poorer qualit3^ The better spruce land is seea to grow at a rate nearly- 

 equal to the spruce of the better soiled hard wood land — nearlj- but not 

 quite. The amounts of yearly growth follow the same law, showing 

 that trees may be left to a good size with the assurance that the income 

 they are bringing in is steadily increasing. 



Note the difierence when the last table is reached, for trees on poorer 

 laud of slow growth. A tree 8 inches in diameter is shown to grow yearly 

 .24 cubic foot. At 11 inches the growth is .36, half as mych more. But 

 here it has reached its limit. That seems to be about as much as the 

 soil conditions will allow it to grow, so there it hangs. These facts show 

 what a diflference there will be in the policy maintained toward different- 

 tracts when timberlands come to handled to best advantage. 



Most striking however is the actual difference in the producing power 

 of trees on these 2 grades of spruce laud. Trees on one produce on the 

 average just about twice as much iis on the other. Of course finer grad- 

 ing of the sites might have been made. Conditions run into one another. 

 Some timber grows more slowly than anything here recorded. 



All these facts are clearest seen when they are grapliicalh' represented. 

 Let us take for instance the growth in volume. Taking a sheet of paper 

 ruled into squares we will put on the horizontal line at the bottom the 

 numbers 7, 8, 9, 10, 11, 12, 13 and 14, the diameters of our clashes of trees. 

 In the same way on the vertical line at the left we will put at regular 

 intervals the numbers .1, .2, .3, etc., representing the amount of yearly- 

 growth in parts of a cubic foot. Now in our tables for hard wood land 

 12 inch trees were shown to grow .7 of a cubic foot yearlJ^ We will 

 therefore mark a point where the line up from 12 and the line across from 

 7 intersect. In the same waj', at 11 inches diameter trees in the same 



