164 



SUCCESSFUL FARMING 



the draft of the plow. This necessitates adjusting the team, and if five 

 horses are used better results will be secured by placing two in the lead and 

 three in the rear, rather than five abreast. 



Next in importance to the plow comes the harrow. The leading forms 

 of harrows are the smoothing harrow, the spring-toothed harrow and the disk 

 harrow. There are a number of forms and many makes of each. The steel- 

 frame smoothing harrow, made in moderate sized sections, with levers to 

 adjust the angle of the teeth, is most efficient. The teeth should be sharp 





DOUBLE DISK HARROW. 1 



in order to do effective work. They should be held in place by clamps that 

 do not easily loosen. When one side of the teeth is badly worn, they may 

 be turned half way around and a new surface brought into use. 



The spring-toothed harrow is made with both wooden and steel frames. 

 The better forms also have either adjustable runners or wheels to regulate 

 the depth of harrowing and to hold the teeth out of the ground in passing 

 from one field to another. Without these adjustments, the harrow may be 

 turned upside-down when taken from shed to fields or from one field to 



* Courtesy of The International Harvester Company, Chicago, 711. 



