SUB SOILING 



109 



going twice in each furrow, and by using a narrow- 

 er one in the rear the subsoil is thrown partly out 

 upon loose ground, then covered with top soil turned 

 into the bottom of the furrow. It is thus grad- 

 ually pulverized and aerated without being brought 

 to the surface at once. A subsoil plow may be con- 

 veniently used in this process. The observant 

 farmer will readily find which implement acts best 

 in each field, and his selection can then be intelli- 

 gently made. 



