COST AND UTILIZATION OF POWER ON FARMS. 
15 
amount of time it was out of running order when it was needed, as 
well as upon the size of the farm. The variation in the number of 
days' work done during the year by the entire 286 machines is shown 
in figure 4. Nine of the machines were used for less than 10 days 
and 7 for 60 or more. 
The number of days of drawbar and belt work on the home farm 
and of custom work done by the 2-plow and 3-plow tractors is given 
in Table 11. The number of tractors of sizes other than the 2 and 
3 plow is not great enough to afford an accurate comparison. The 
3-plow tractors did considerably more belt work both on the home 
farm and for the neighbors than did the 2-plow machines. The 
drawbar work on the home farm constituted 80 per cent of the total 
work done by the 2-plow tractors and only 71 per cent of that done 
by the 3-plow machines. 
Days per year 
Number of Tractors 
10 20 30 40 50 60 70 80 
Less than 10 
10 - 19.9 
20 -299 
30 -399 
40 -49 9 
50 -59 9 
60 and over__._ 
Fig. 4.— Variation in number of days tractors were used per year. 
Table 11. — Days work per year done by 2-plow and 3-plow tractors. 
Size of tractor. 
Number. 
Days of work on 
home farm. 
Days of custom 
work. 
Total. 
Draw- 
bar. 
Belt. 
Draw- 
bar. 
Belt. 
174 
104 
25.8 
20.2 
2.1 
3.5 
2.6 
1.3 
1.8 
3.5 
32.3 
3-plow 
28.5 
DRAWBAR WORK. 
The 23.5 days of drawbar work on the home farm which the 
average tractor did was divided among the following operations: 
Days. 
Plowing 12. 4 
Disking, harrowing, and other work in fitting ground 7.6 
Cutting grain 1.5 
Loading and hauling hay 4 
Other 1.6 
Although the tractors on these farms were used more for plowing 
than for any other drawbar operation, the amount of time spent on 
other work almost equaled that spent in plowing. 
The " other" drawbar work, which amounted to 1.6 days for the 
average tractor, consisted of many operations, such as cultivating 
