314 DRY-FARMING 
made and tried out on the famous dry-farm district 
at Nephi, Utah, and with the greatest success. Hun- 
ter reports a similar implement in common use on the 
dry-farms of the Columbia Basin. Spring tooth har- 
rows are also used in a small way on the dry-farms. 
Fig. 82. Riding cultivator. 
They have no special advantage over the smoothing 
. harrow or the disk harrow, except in places where the 
attempt is made to cultivate the soil between the 
rows of wheat. The curved knife tooth harrow is 
scarcely ever used on dry-farms. It has some value 
as a pulverizer, but does not seem to have any real 
advantage over the ordinary disk harrow. 
Cultivators for stirring the land on which crops are 
growing are not used extensively on dry-farms. Usu- 
ally the spring tooth harrow is employed for this 
work. In dry-farm sections, where corn is grown, 
the cultivator is frequently used throughout the 
