COST AND UTILIZATION OF POWER ON FARMS. 
13 
cultivating, and harvesting, upon the amount of horse labor used in 
caring for live stock and for miscellaneous work, and upon the 
amount of work done with the tractor. 
Table 9. — Number of workstock, days 1 of horse labor, and days' work per head on farms 
of different sizes. 
Size of farm (crop acres). 
Number 
of farms. 
Number 
of work- 
stock. 
Horse 
labor per 
farm per 
year, 
days. 
Days' 
work per 
head per 
year. 
Less than 80 
7 
28 
71 
56 
47 
36 
19 
22 
3.4 
3.9 
5.1 
6.2 
7.4 
8.0 
9.3 
12.5 
203.2 
239.4 
319.0 
416.5 
449.6 
532.9 
587.6 
1,070.1 
59.7 
80 to 119 
64.0 
120 to 159 
66.4 
160 to 199 
70.1 
200 to 239 
62.5 
240 to 279 
70.9 
280 to 319 
66.4 
320 and over 
91.7 
All 
286 
6.8 
451.5 
68.6 
The number of days' work per head, being dependent upon both 
the entire amount of horse labor used on the farm and the number of 
workstock kept, likewise showed great variations, ranging from less 
than 40 to more than 100 days. The size of the farm in itself had 
very little bearing on the number of days' work per horse. While the 
average for the farms with 320 or more crop acres is considerably 
higher than for the other sizes ; the horses worked less than 70 days 
per head on 6 of the 22 farms. Figure 2 shows the number of farms 
with different amounts of work per horse during the year. 
Days Work per Horse 
Less than 40... 
40 - 59.9.. 
60 - 79.9.. 
80 - 99.9.. 
100 and oven 
20 
Number of Farms 
30 A0 50 fin 7() 
_ao 
22 ioa 
Fig. 2.— Variation in number of days' work per horse 
WORK DONE BY TRACTOR. 
The average number of days of drawbar and belt work on the 
home farm and of custom work done by the tractors on farms of 
different sizes are shown in Table 10. 
There was a larger percentage of small machines on the smaller 
farms than on the larger ones, and to this extent the number of days 
work per year is not a true index of the actual amount of work done 
by the tractors on the farms of different sizes. The table does show, 
however, the relative importance of the different classes of work.. 
The number of days of drawbar work on the home farm increases 
quite regularly with the increase in the size of the farm, and on the 
