164 



SOUriiEIiN FIELD CHOPS 



abundantly drj- for plowing), more harm than good will 

 result. 



Since the subsoil is compact, much power is needed to pull 

 a subsoil plow (Fig. 78), making this a rather expensive 

 operation. While there are many exceptions, the majority 

 of experiments in subsoiling land subsequent to January 1 

 have shown no immediate increase, or not enough to pay 

 for the extra cost of subsoiling. Sul^soiling, when needed 



Fig. 79. — A Turn-plow. 



at all, should not be done more freciuently than once in 

 two or three years. It is usuall>' more practicable to in- 

 crease the depth of ordinarj' plowing than to practice sub- 

 soihng. 



Implements used in prepnralion for corn. — Besides the stalk 

 cutter, the implements for jireparation are usually eitlier (he turn- 

 plow (Fig. 79), which may be of various sizes and patterns, or the 

 disk-plow (Fig-. 80). The latter is suited only to level plowing but 

 does its work- more completely than the turn-plow, though apjiar- 

 ently at greater expenditure of horse power. Use is sometimes 



