36 



BULLETIN 907, L T . S. DEPARTMENT OE AGRICULTURE. 



Table 24. — Proportion of different operations done ivithhorses and with tractors (all 



farms) . 



Operation. 



Days of 

 horse 



labor per 

 farm. 



Horse- 

 day equi- 

 valent of 

 tractor 

 work. 



Total. 



Percent- 

 age done 

 with 



tractors. 





18.9 



128.1 

 102.9 

 11.8 

 12.2 

 80.4 

 18.9 

 18.1 

 31.3 

 99.0 

 12.3 

 43.8 

 49.1 

 36.4 



85.2 

 66.5 



Fitting ground after plowing 



Seeding grain 



34.5 

 11.8 

 12.2 

 80.4 

 17.4 

 10.7 

 31.3 

 99.0 

 4.4 

 43.8 

 49.1 

 36.4 



68.4 



Planting corn 







Cultivating 







Haying 



1.5 



7.4 



7 9 



Thrashing 



40.9 



Corn harvest 







Other field work 



7.9 





Hauling manure 





Other work on farm 



















Total 



449.9 



194.4 



644.3 



30.1 



As measured in terms of the days of horse labor required for it, 

 the tractors did 30.1 per cent of the drawbar work on these farms. 

 The proportion of the work done with the tractors varied among 

 the individual farms, but there was no great variation in the average 

 for the different areas. 



The percentage of the work, in terms of days of horse labor, done 

 by the tractors in the different areas was as follows: 



Percent. 



Madison County, Ohio 27. 



Seneca County, Ohio 30. 2 



Madison County, Ind 35. 6 



Montgomery County, Ind 34. 



Livingston County, 111 30. 5 



Knox County, 111 28. 9 



The tractors on the larger farms did considerably more drawbar 

 work than the machines on the smaller farms, but the size of the 

 farm had very little influence on the proportion of the total done 

 with the tractor. 



If it had been possible to measure the work done by the tractor 

 and workstock in terms of drawbar pull and distance traveled, the 

 proportion of the total done by the tractors would have been con- 

 siderably greater. A large proportion of the work done by the 

 tractors was plowing and other work in preparing the seed bed, 

 which requires steady pulling of a heavy load, while a large part of 

 the work done by the horses was hauling and other work which does 

 not require steady pulling of heavy loads. 



The 2-plow tractors were used more for disking and for the lighter 

 operations of harrowing, rolling, etc., and for cutting grain than 

 were the 3-plow machines (see Table 12). The proportion of the 

 total work required for plowing and preparing the seed bed and for 



