26 BULLETIN 12U, U. S. DEPARTMENT OF AGRICULTURE 
Table 15. — Horse-labor requirements per acre, by operations for oats, 1921 
Acres 
per 
farm 
Yield 
Plowing 
Disking 
Harrowing 
Farm No. i 
Total 
Times 
over 
Total 
Times 
over 
Total 
Times 
over 
3 
81 
93 
41 
77 
32 
50 
45 
47 
81 
32 
54 
25 
24 
41 
41 
20 
27 
34 
8 
58 
15 
53 
Bushels 
33 
28 
29 
34 
29 
41 
31 
32 
31 
36 
45 
~32 
32 
35 
26 
31 
39 
37 
28 
37 
24 
40 
Hours 
Hours 
3.02 
1.42 
3.29 
4.76 
4.13 
4.08 
5.04 
3.02 
4.20 
4.64 
4.48 
3.90 
5.64 
3.04 
7.28 
3 5.35 
"T25-" 
1.81 
3.90 
6.95 
4.06 
1.54 
.81 
1.16 
2.30 
2.50 
2.00 
2.00 
1.54 
2.00 
2.00 
2.00 
2.00 
2.00 
1.39 
2.00 
2.50 
2.00 
.60 
1.00 
1.68 
2.92 
2.00 
Hours 
0.87 
1.72 
1.48 
1.06 
1.70 
1.04 
1.06 
1.12 
.86 
.66 
.60 
.90 
1.16 
1.63 
1.56 
3.84 
1. 21 
2 
5.69 
0.59 
1.98 
17 
1. 16 
.55 
.66 
.065 
.07 
1.00 
10 ... *. 
2.00 
6 
1.00 
9. . 
.41 
4.77 
.04 
.46 
1.38 
7 
1.00 
5 
1.00 
15 
.53 
4 
.72 
20 
1.00 
19 
.31 
4.88 
.03 
.43 
1.00 
18... 
2.30 
14 
1.31 
16... 
M.76 
""6." 62" 
6.26 
5.96 
2.83 
5.59 
.17 
1.00 
.70 
.65 
.50 
.31 
.61 
3.00 
13 
11.. 
1.82 
.73 
1.93 
1.46 
1.04 
1.70 
21 
1.00 
12 
2.32 
22 
1.46 
8 
1.00 
Average: 
21 farms, 1921 4 
45 
40 
48 
33 
37 
41 
2.15 
5.03 
.40 
.21 
.48 
.04 
3.87 
2.96 
3.97 
1.75 
1.23 
1.92 
1.29 
1.67 
1.20 
1.37 
16 farms, 1920 J 
18 farms, 1922 4 . . 
1.64 
1. 12 
Farm No. * 
Seeding 
Cutting 
Stacking 
Stack 
threshing 
Shock 
threshing 
Total 
3 
Hours 
0.96 
1.98 
2.06 
2.04 
1.05 
1.92 
.90 
.40 
.60 
2.00 
1.83 
1.61 
3.11 
1.83 
.69 
2.65 
1.88 
2.16 
2.18 
1.88 
.94 
2.00 
Hours 
2.96 
2.92 
3.64 
3.20 
3.76 
3.22 
2.20 
3.36 
3.03 
3.96 
2.64 
3.48 
5.06 
3.86 
3.57 
3.68 
3.03 
3.16 
3.63 
3.60 
4.32 
3.68 
Hours 
Hours 
Hours 
3.95 
2.66 
3.20 
4.36 
3.70 
5.02 
5.10 
3.98 
Hours 
11.76 
2... 
16. 39 
17 
13.67 
1.. 
15.97 
10 
15.00 
6 
15.28 
9... 
14.71 
7 
16.65 
5 
3.53 
1.09 
13.31 
15 
4.91 
5.59 
16.17 
4 _. 
15.14 
20... 
2.76 
2.76 
.97 
1.49 
13.62 
19 
19.53 
18... 
4.87 
5.09 
20. 11 
14 
18. 19 
16 
3.67 
3.23 
.51 
1.20 
21.46 
13 
9.34 
11 
4.93 
19.94 
21 
2.90 
3.62 
3.78 
3.75 
1.93 
2.39 
1.08 
1.95 
19.44 
12 
23.28 
22 
21.38 
22.07 

Average: 
•-'i farms, 1921 < 
1.57 
1.81 
1.42 
3.31 
3.08 
3.01 
3.46 
3.04 
3.47 
1.52 
1.10 
1.20 
4.27 
4.98 
3.36 
» 16.46 
16 farms, 1920< 
5 19.53 
18 farms, 1922* 
M3.36 
1 Farms are arrayed in order of total man-labor requirements beginning with the lowest. 
• 2.18 tractor hours per acre were used for plowing. 
I ractor hour per acre was used for disking. 
' Farms using tractors omitted in computing these averages. 
' I '/ill Is for shock threshing. Total hours per acre for stacked oats in 1921, 17.17. 
