COST AND UTILIZATION OF POWER ON FARMS. 



21 



practice being to pull one or more of these implements behind the 

 disk. In all, 207 men did at least part of this work with tractors. 

 One hundred and sixty-four of them used these implements behind 

 their disk harrows, and 43 used them alone. (See fig. 6.) 



The number of men on the various-sized farms who used these 

 implements and the kind of power employed are given in Table 18. 



Fig. 6. — Tractor preparing corn ground for winter wheat with a double disk and packer. 



Table 18. — Kind of power used for harrowing, rolling, planking, and packing on farms 



of different sizes. 



Size of farms (crop acres). 



Number 



of 

 farmers. 



Farmers 

 using 



tractors 

 only. 



Farmers 

 using 



tractors 



and 

 horses. 



Farmers 

 using 

 horses 

 only. 





7 

 28 

 70 

 53 

 47 

 35 

 18 

 22 



3 

 11 

 20 

 12 

 7 

 7 

 4 

 2 



3 



14 

 33 



26 

 26 

 19 

 9 

 11 



1 



goto 119 



3 



120 to 1 59 



17 



160tO 199 ". 



15 



200to239 



14 



240to279 



9 



280to319... 



5 





9 







Total 



280 

 100 



66 

 24 



141 73 

 50 26 









Here again the size of the farm had some influence on the portion 

 of this work done with tractors. On 32 per cent of the farms with 

 less than 160 crop acres, and on only 18 per cent of those with 160 or 

 more crop acres, all this work was done with tractors. The implements 

 used for this work are normally of light draft, and where the tractor 

 and horses were used simultaneously for fitting the ground, the 

 former was often used on the plow or disk and the latter for harrow- 

 ing, etc. 



In all, 72 per cent of the harrowing, planking, rolling, and packing 

 done with tractors was done with one or more of these implements 



