Farm Machinery 



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type illustrated in Fig. 200 is known as a spading or cutaway 

 harrow. A harrow of this type gives a spading action which is 

 efficient in cutting up clods and smoothing the soil and is espe- 

 cially useful on heavy soils. 



Spring-tooth harrows. In the spring-tooth harrows (Fig. 

 201) a series of flat, curved blades is fitted on a frame. The 

 depth at which the blades enter the ground can be regulated 

 by means of the levers. These harrows are especially efficient 

 on stony ground or on soil that becomes compacted easily. 



FIG. 202. Spike-tooth harrow. 



Spike-tooth harrows. A much used type of harrow is 

 the spike-tooth (Fig. 202). These harrows consist of a series 

 of iron teeth fitted into a frame in such a way that they can be 

 adjusted to stand in a vertical position or be slanted either 

 forward or backward. They are useful for stirring and smooth- 

 ing the soil. 



Blade harrows. The Acme, or blade harrow, which is shown 

 in Fig. 203, consists of a row of blades that slice and turn the 

 soil. This harrow pulverizes and smoothes the soil, espe- 



