POPLAR-BIRCH TYPE 57 



of age on the stump. It lies mostly in the ravines and protected pockets where it 

 escaped the subsequent fires. Sample strips totalling 4 acres were run through these 

 stands and the occurrence of the various species on the average acre is given below. 



Poles and Saplings of Various Species on an Area Burned but Once: 

 Number of Trees per Acre 



Species — Trees Per cent 



Poplar 208.0 51.2 



White Pine 62.2 15.3 



Paper Birch 50 .0 12.3 



White Spruce 37.5 9.2 



Balsam 29.5 7.3 



Cedar 13.5 3.3 



Red Pine 4.5 1.1 



Tamarack 1.0 0.24 



Hemlock 0.2 0.06 



Total 406.4 100.00 



Sample plots to the extent of 7.6 acres were made in a stand arising from a fire 

 20 years ago with the following results : 



Poles and Saplings of Various Species on an Area Burned Twice: 

 Number of Trees per Acre 



Species — ■ Trees Per cent 



Poplar 320.0 71.3 



Paper Birch 78.0 17.4 



White Pine 19.0 4.3 



Balsam 12.0 2.7 



Cedar 11.4 2.5 



White Spruce 4.0 0.9 



Red Pine 3.2 0.7 



Tamarack 0.9 0.2 



Total 448.5 100.0 



The areas burned three times, the last time 12 years ago, have the composition 

 given in the table below. 



Poles and Saplings op Various Species on an Acre Burned Three Times : 

 Number of Trees per Acre 



(Average of 2.7 acres) 



Species — Trees Per cent 



Poplar 328.0 46.8 



Pin Cherry 125.0 17.9 



Paper Birch 93.0 13.3 



Red Maple 60.0 8.6 



Willow 58.0 8.3 



Red Oak 22.0 3.1 



White Oak 3.4 0.50 



WTiite Spruce 2.2 0.31 



Basswood 2.0 0.30 



\VhitePine 1.8 0.25 



Red Pine 1.8 0.25 



Balsam 1.1 0.15 



Elm 1.0 0.14 



Cedar 0.7 0.10 



Totixl 700.0 100.00 



So far as could be discovered, the area burned the fourth time, in 1911, is without 

 the possibility of pine reproduction, since all of the seed trees have been killed except 

 an occasional one in the margin of a swamp. 



