10 
BULLETIN 3. TJ. S. DEPARTMENT OF AGRICULTURE. 
the daily duty is readily found by subtracting from 1.80, the allow- 
ance, 0.12 acre, multiplied by the difference between 9 and 6, giving 
a work factor of 1.44 acres. 
Table II. — A -normal day's work with a walking plow, giving the daily acreages reported 
at 6-inch depths for each width, adjustments for these widths, and a scale of allowances 
for other depths. 
[Sex hours in the field,. 9.65.] 
Team and width. 
Plowed 
per day. 
Number 
averaged. 
Allow- 
Adjusted anceper 
acreage. | inch in 
depth. 
Prac- 
ticable 
depths. 
Two-horse teams: 
Acres. 
L62 
1.67 
1.76 
2.00 
2.11 
1.50 
2.10 
1.50 
2.40 
2.32 
2.77 
IS 
64 
19 
143 
151 
22 
1 
■5 
2 
10 
38 
65 
Acres. 
1.50 ! 
1.60 ! 
i.65 : 
1.70 .10 
1.S0 .12 
1.90 .15 
1.70 
1.90 
2.00 : o 
2.10 
2.30 ! .10 
2.50 .12 
Inches. 
3 to 12 
3 to 12 
3 to 12 
3 to 10 
3 to 9 
3 to 8 
Three-horse teams: 
3 to 12 
3 to 12 
3 to 12 
3 toll 
3 to 10 
3 to 9 
From the tabulation of 1,056 reports on sulky plows it appears 
that that implement is not in such general use as the walking plow, 
only half as many of this type being reported. A considerable 
number reported the 18-inch width, while the 12. 14. and 16 inch 
widths are the most popular. A 16-inch sulky is used by 57 per 
cent, the 14-inch by 23 per cent, while only 20 per cent use other 
widths. As in the case of the walking plow, there was concentration 
on the 6-inch depth, the percentage for which was the same for both 
walking and sulky plows, while for depths greater than 6 inches the 
sulky plows show a smaller percentage than the walking plows. 
Of those reporting, only 12 per cent plow at depths other than 4, 5, 
6. 7, S, and 9 inches with this implement. It was also found that 
76 per cent of sulky plows are drawn by three horses and 10 per cent 
by four horses. The draft of the implement is so great that only 12 
per cent of the users attempt to operate it with two horses. The 
sulky plow is used for cutting wider furrows, but not for such deep 
plowing as is the walking plow. 
When the data for sulky plows were grouped by widths with the 
depths averaged it was seen that the acreage plowed increased 
as the width increased and that heavier horses were used on the 
greater widths. The average load required of each 1,000 pounds of 
horse was 34 square inches for 2-horse teams, 25 square inches for 
3-horse teams, and 21 square inches for 4-horse teams. The respec- 
tive acreages plowed by these teams per 1,000 pounds of horse was 
0.71. 0.72, and 0.64. A team of two horses is necessarily overloaded 
by a sulky plow, and four horses are not economical except on very 
hard or unsubdued land. 
