STANDARD DAY S WORK IN CENTRAL ILLINOIS. 9 



THE DISK HARROW. 



The disk luirrow is used on nearly every Corn-Belt Farm. Eighty- 

 five per cent of the men from Avhom these reports were received own 

 tliem. They are used for working up fall plowing in the spring and 

 for preparing corn stubble for oats, as well as on freshly plowed 

 ground. Practicall}' all of these implements are single disks, and the 

 8-foot width is the most common, although the 7, 9,, and 10 foot sizes 

 are found on some farms. All of the men reporting 7- and 8-foot 

 disks stated that thev use four horses on them. Foiii- horses were re- 



FiG. 2. — The o-bnttoDi traclur cc vers 8.(j7 acres per clay in spring and 8.06 in the fall. 



ported most often for the 9-foot size, although some farmers use 

 five or six horses. Four, five, and six horse teams were reported for 

 the 10-foot disk, the 6-horse team being the most common. 



Table VII. — Disk harroio on iDell-paclcecL land. 



Width. 



Number of 

 horses. 



Number of 

 reports. 



Acres per day. 



Average. 



Acreage most 

 often reported. 



Feet. 



7 



8 



9 

 10 



4 



4 



4 

 6 



52 



350 



15 

 17 



15.4 



17.4 



IS. 9 

 23.5 



\i {13 reports). 

 /18 (SS reports). 

 \20 {91 reporU). 



Scattering. 

 Do. 



138712°— Bull. 814—20- 



