CULTIVATION IN DRY AREAS 149 



The blades give a chopping blow and, therefore, cut 

 more deeply in hard ground than the round disc, but 

 they do not pulverize it so well. The cutaway disc is 

 something of a mean between the disc and the spading 

 disc, which is virtually a form of disc that does not clog. 

 It can be used on rough corn ground, for instance, sev- 

 eral days earlier than the ordinary disc. 



Cultivators other than the disc. The various culti- 

 vators in use are very many and for each there would 



THE MINNESOTA CHIEF SPRING TOOTH HARROW. 

 Courtesy Deere & Webber Co., Minneapolis, Minn. 



seem to be a place where it will do better work than 

 can be done by other cultivators. In dry areas, how- 

 ever, the number of these that are highly adapted to the 

 needs of the farmer is somewhat limited. Prominent 

 among these are : the spring tooth cultivator, frequently 

 called the spring tooth harrow ; the clod crusher ; the 

 Climax cultivator; the alfalfa cultivator; the alfalfa 

 renovator, sometimes called the alfalfa harrow ; the 



