NORMAL DAYS WORK FOR VARIOUS FARM OPERATIONS. 
13 
Table IV. — A normal day's work with a gang 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. 
[Net hours in the field, 9.65.] 
Team and width. 
Plowed 
per day. 
Number 
averaged. 
Adjusted 
acreage. 
Allow- 
ance per 
inch for 
other 
depths. 
Prac- 
ticable 
depths. 
Four-horse teams: 
Acres. 
4.23 
4.72 
5.00 
5.14 
4.50 
5.05 
71 
73 
8 
69 
4 
31 
4.00 
4.25 
4.50 
4.80 
4.75 
5.25 
Acres. 
0.12 
.15 
.10 
.12 

.10 
Inches. 
3 to 8 
28 inches 
3 to 7 
Five-horse teams: 
24 inches 
3 to 9 
28 inches 
3 to 8 
Six-horse teams: 
3 to 10 
28 inches 
3 to 10 
Limited data on plowing with traction engines have been assembled 
in Table V by the rated horsepower of the engines used. In the 
last column of the table the adjusted factors have been included, 
these being based on the average efficiency of the total number 
reporting, then weighted according to the rated horsepower opposite 
each, respectively, in the first column, and finally reduced 10 per 
cent. With this type of equipment the total day in the field is from 
1 to H hours longer than with horse-drawn plows, while the time 
actually in motion with engines is nearly as long as the entire day 
in the field with horses. The depths at which the traction outfits 
work is considerably less than the practice with the ordinary plows 
in the humid sections. On sod, the width of cut is less and the depth 
plowed is about two-thirds of that on stubble. From 20 to 25 per 
cent greater areas can be plowed daily with the same equipment on 
stubble than can be turned in sod. From average compilations it 
appears that the daily efficiency of tractors in plowing is about 
0.90 acre on stubble and 0.70 acre on sod for each unit of rated 
power, while the load for each unit of power is 31 square inches 
in cross section on stubble and 20 inches in breaking sod. 
Table V. — A normal day's work in plowing stubble and sod with traction engine, giving 
the average acreage imported, according to the horsepower of tractor. 
PLOWING STUBBLE. 
[Net hours in the field, 10.97; net hours in motion, 9.25.] 
Horsepower of engine. 
Width 
of cut. 
Depth. 
Reported 
acreage. 
Number 
averaged. 
Adjusted 
acreage. 
15 
Feet. 
7.4 
7.9 
9.7 
11.3 
11.5 
14.6 
15.3 
10.0 
12.3 
Inches. 
5.9 
6.2 
5.8 
6.0 
6.2 
6.3 
5.6 
5.9 
7.0 
15.4 
18.4 
21.0 
22.6 
24.7 
32.5 
33.3 
22.0 
27.2 
5 
20 
14 
54 
33 
26 
11 
13 
12 
12 
20 
16 
22 
18 
25 
20 
30 
24 
32 
26 
40 
32 
45 
36 
60 
42 
