DRY-FARMING 



But at the present time they are not 

 much used in dry-farming. Neverthe- 

 less, such plows are sometimes used to 

 good purpose. For example, heavy clays 

 that require underdrainage are generally 

 benefited by subsoiling, or they may be 

 used for breaking up a hard pan or plow- 

 sole. In subsoiling it is customary to 

 turn the surface with a common stirring 

 plow and to follow in this furrow with 

 the subsoil plow. This loosens the soil to 

 a depth of 18 to 24 inches from the top of 

 the ground. 



In subsoiling dry fields, however, it 

 will often be better to use a plow with 

 a subsoihng attachment, running it a 

 few inches below the bottom of the fur- 

 row and so gradually getting to the de- 

 sired depth by plowing year after year. 

 By this method an excellent seed-bed 

 may be secured. 



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