242 



AGRICULTURAL ENGINEERING 



Fig. 150. A surface cultivator. 



anything but satisfactory. 



Surface Cultivators. The surface cultivator is apparently 

 gaining favor throughout the corn belt. It is provided with 



long flat shovels which shave 

 the ground from one to two 

 inches below the surface, cut- 

 ting off the weeds and pulver- 

 izing the surface. The sur- 

 face cultivator is a special 

 implement. It has been the 

 author's experience that go- 

 pher or surface shovels at- 

 tached to the shovel cultivator 

 with an extra arch between are 

 It is quite necessary that the 

 gangs be of very rigid construction or the shovels will not 

 run at an even depth and will not be easily controlled. 

 The surface cultivator 

 will work satisfactorily 

 only where the ground is 

 in good tilth and free 

 from trash. 



The Disk Cultivator. 

 The disk cultivator is 

 preferred by some corn 

 growers. It is generally 

 used in connection with 

 the weeder or for listed 

 corn, as it moves consid- 

 erable soil in one .direction, either to or from the corn. 

 Strength and durability of the parts, especially the bear- 

 ings, are the important things to consider when making 

 a selection. 



Fig. 151. A disk cultivator. 



