COST AND UTILIZATION OF POWER ON FARMS. 



17 



Table 13 shows the number of owners of 2 and 3 plow tractors who 

 used their machines on the different operations: 



Table 13. — Number of oivners using their tractors on the different operations. 



Owners using 3- 

 Operation. plow tractors for plow tractors for 



operation specified. 



Plowing (spring or fall) 



Pulling disks alone 



Pulling disks in combination with harrows, rollers, or plankers. 



Pulling harrows, rollers, etc., alone 



Drawing hay loaders 



Drawing grain binders 



Other draw-bar work on home farm 



Number. Per cent. 

 All 100 



Fig. 5. — Tractors did 85 per cent of all the plowing on these farms. 



Plowing. — Table 14 shows the average number of acres plowed 

 during the year, and the number plowed with tractors and with horses 

 in both the spring and fall on farms of different sizes. A little over 

 half of the crop area of the farms was plowed during the year. 

 Eighty-five per cent of all this plowing was done with the tractors; 

 81 per cent of the spring plowing was done with them, and 91 per 

 cent of the fall plowing. Every man interviewed had used his 

 tractor for some plowing during the year, and 140 of the 286 had 

 done all of their plowing with tractors. (See fig. 5.) 



56390°— 21— Bull. 997 3 



