674 SOILS: PBOPEBTIUS AND MANAGEMENT 



paratively large shovels set rather far apart, which vigor- 

 ously tear up the earth to a considerable depth and leave 

 it in large ridges. There is a lack of uniform action, and 

 the bottom of the cultivated part is left in hard ridges. 

 Such implements are now much less used than they were 

 formerly, and may be considered to supplant in a measure 

 the use of the plow, where deep working without turning 



Fig. 70. — Types of cultivators: (1), wheel hoe, or hand garden culti- 

 vator, with attachments; (2), adjustable small-tooth, one-horse 

 cultivator, with duck-foot shovel behind; (3), two-horse spring- 

 toothed cultivator; (4), two-horse sweep or knife cultivator; 

 (6) , two-horse disk cultivator. 



