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 this 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. 
TaBLeE II1.—Cost of labor and material in clearing an acre of tract No. 1. 
Cost. 
Days em- 
ue ployed. | 
Perdiem.| Total. 
Blasting stumps: 
ALO WiC Orth Qa seer ert. he os So en eee Napa ee Soe eee 1 $2.00 $2.00 
Dynamites 7o;pounds ab, 13 !Ce@mits 32. Ao = eae eee ie ae ee on ee ee 9.75 
Caps and TUSe. ate ek cc Sees ae er ed mete UI TE Rev nee Sere epee Server ERT ese fer ee 1.13 
Pulling roots and piling and burning stumps: | 
aime. 4 dayaCaG heen. =. sea ae ae era Sud isles tye Shs fees ee Ee 3 1.75 5220 
SET crI Wil GS CAIN er so eae ee erie oe ee spe ee me Sem ee Se 1 5.00 5. 00 
TotaliGostipemacre. as.) oe See ees See ee SE Ee as eee ee me eg neg ee a ee 23515 
Totalicost Per'stumMp..— 2-2 ee ee gs Ie ee Eee ee oe et See ee eee ee oe . 463 
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 cost 
of blasting, which makes an average of 86 cents per stump and approx- 
imates $86 per acre. 
TRACT NO. 3. 
Seven acres containing 334 white-pine stumps upon pasture land 
having 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 
gr. es 
a: 
4, AT i yee Sarena 
