12 BULLETIN 91, U. S. DEPARTMENT OF AGRICULTURE. 



TRACT NO. 1. 



Tract No. 1 contained 40 acres of level land. The soil to root depth 

 varied from medium to fine sand. The blasting was done in the 

 spring of 1913 at a time when the ground was wet. The tract was 

 logged 32 years before. Since that time it had been burned repeat- 

 edly, and there was no undergrowth. The tract averaged 4 or 5 

 small logs per acre. Of the stumps on the tract 16 per cent were so 

 severely burned that it was necessary to partially dig the roots out 

 and pull them with a team. The average number of stumps per 

 acre was 50, of which 20 per cent were Norway pine and 80 per cent 

 were white pine. The diameter of the stumps at, the cut-off varied 

 from 6 to 30 inches, the average being 20.2 inches. 



The owners of tins tract had recently purchased a capstan stump 

 puller. With an inexperienced crew the cost of pulling and disposing 

 of the stumps, as shown in Table III, was practically the same as 

 with dynamite. 



Table III. — Cost of labor and material in clearing an acre of tract No. 1. 



('O.St. 



Days em- 

 ployed. 



Per diem. 1 Total. 



Blasting stumps: 



1 powder man ! 1 | $2. 00 



Dynamite, 75 pounds at 13 cents | 



Caps and fuse 



Pulling roots and piling and burning slumps: 



3 men, 1 day each 



1 man with team 



Total cost per acre. . . 

 Total cost per stump . 



3 1.75 



1 5.00 



1.13 



5.25 

 5.00 



23.13 



.4(53 



TRACT NO. 2. 



Three acres of pasture land having a sandy soil, containing 297 

 white-pine stumps 18 to 36 inches in diameter, were blasted by the 

 use of 1,200 pounds of powder containing no nitroglycerin. This is 

 an average of 43 cents per stump, including the cost of labor for doing 

 the powder work. The cost of piling and burning is equal to the cos I 

 of blasting, which makes an average of 86 cents per stump and approx- 

 imates S86 per acre. 



TRACT NO. 3. 



Seven acres containing 334 white-pine stumps upon pasture land 

 ]i aving a clay soil were blasted, piled, and burned at a cost of $200, 

 an average of 60 cents per stump and $28.57 per acre. 



TRACT NO. 4. 



Tract No. 4 contained 24.21 acres of level land having a sandy- 

 loam soil within root depth and practically no stones. The outfit 

 used was a capstan stump puller, with 200 feet of 1-inch cable on a 

 drum and an additional length of 150 feet of 1-inch cable, giving the 



