BULLETIN 338, U. S. DEPARTMENT OF AGRICULTURE. 
Table II. — Walking plows — relation of work done annually to service and cost per acre 
and per day used on 1,165 farms. 
Range of area covered annually acres. . 
lto20. 
21 to 30. 
31 to 40. 
41 to 50. 
51 and 
over. 
Average. 
263 
15.6 
12.5 
195.0 
115 
9.0 
407 
28.0 
12.2 
341.6 
204 
10.4 
292 
39.6 
11.7 
463.3 
269 
12.8 
120 
48.4 
11.0 
532.4 
291 
14.0 
83 
68.5 
8.6 
589.1 
300 
15.1 
Average areacovered annually acres. . 
32.9 
11.7 
384.9 
Days actually used during life 
224 
Average width of plow inches. . 
11.8 
Cost when new 
$8.00 
17.25 
3.25 
S9.25 
24.64 
3.66 
$11.50 
25.27 
4.45 
$12. 00 
27.28 
4.84 
$13.00 
27.95 
3.78 
$10.00 
Total cost of repairs during life 
23.99 
Total interest during life at 6 per cent 
3.86 
Total of depreciation, interest, and 
repairs during life 
28.50 
37.55 
41.22 
44.12 
44.73 
37.85 
Cost of walking plow: 
SO. 248 
.146 
SO. 184 
.107 
SO. 153 
.089 
$0. 151 
.082 
$0. 149 
.076 
$0,169 
.098 
The average cost of new walking plows of the average size shown 
in Table I is $10. Even though the heavier plows cost more money, 
the machinery and interest charges per acre and per day progressively 
decrease, as more work is done annually by the plow. There is a 
uniform decrease in the cost of repairs per acre as the acreage plowed 
annually is increased. The size and weight of the plow also increase 
with the increasing acreage. The average cost per acre for repairs 
is $0,062. The repairs made to a plow during its life amount to 
more than twice its first cost. 
Table III. — Sulky plows — relation of work done annually to service and cost per acre 
and per day used on 294 farms. 
of area covered annually acres. . 
Number of records included 
Average area covered annually acres. . 
Years of service rendered 
Acres covered during life 
Days actually used during life 
Average width of plow inches. . 
Cost when new 
Total cost of repairs during life 
Totalinterest during life at 6 per cent 
Total of depreciation, interest, and repairs during life 
Cost of sulky plow: 
Per day used 
Per acre plowed 
1 to 20. 
14.3 
11.3 
161.6 
83 
11.0 
$40. 00 
14.92 
14.92 
$0,841 
.432 
21 to 40. 
150 
32.8 
7.0 
229.6 
108 
13.1 
$45. 00 
15.75 
10.78 
ri.53 
SO. 662 
.311 
41 and 
over. 
55 
55.1 
6.2 
341.6 
150 
16.5 
$47. 50 
19.65 
10.29 
77.44 
$0. 516 
.229 
Average. 
30.9 
8.1 
250.3 
119 
13.3 
$42. 50 
17.17 
11.58 
71.25 
$0. 590 
.284 
THE SULKY PLOW. 
The sulky plow (Table III) is much less generally used in western 
New York than is the walking plow, only 294 being reported as com- 
pared with 1,165 walking plows. Greater acreages are plowed daily 
per plow than with walking plows, and the number of days of work 
done annually by the sulky plow is somewhat less than for the walking 
plow. A sulky plow requires three horses for its proper operation, 
and this increased power applied to the implement results in greater 
