

Alfalfa in Kansas. 295 



chasing. It might be well to mention in this connection that harrow 

 carts can also be attached to weeders and spring harrows. 



OPERATION AND CARE. The teeth can be slanted for smoothing, and 

 set almost straight up and down for breaking clods. They are used to 

 break up clods, cover seeds sown broadcast, form dust mulches, kill weeds 

 just starting, and to cultivate a few of the crops while they are still 

 small. 



For heavy work the %-inch tooth is better than the %-inch. Har- 

 rows 10 to 15 feet wide require three horses; if more than 15 feet, four 

 horses are necessary. 



One point that is almost invariably overlooked is the fact that the 

 position of the teeth can be changed in the fasteners. Two edges of a 

 square or diamond-shaped tooth should be made use of before the harrow 

 is discarded. (See "Harrow," in index.) 



Land Rollers. 



Alfalfa requires a firm seed bed, so this machine is quite a factor 

 in the preparation of the ground. 



Two general kinds of surfaces are used the smooth and the cor- 

 rugated. The latter is made in many different styles, among which may 

 be mentioned the tubular, V-shaped, and so-called, crowfoot wheels, or a 

 combination of V-shaped and notched disks. The subsurface packer will 

 not be discussed. 



Fia. 232. Another type of land roller. [Courtesy The Dunham Company.] 



