HANDLING THE SOIL 



47 



and they must stir all of the surface soil. There are harrow- 

 tooth cultivators, spring-tooth cultivators, colter or shovel 

 cultivators, gopher cultivators, and disk cultivators. Some 

 cultivate only one side of a row at a time, most of them culti- 

 vate a whole row at a time, and some of them cultivate two 

 rows at a time. But any and all of these cultivators must 

 fulfil the two requirements if they are to do good work. 



A TWO-ROW CORN CULTIVATOR 



The most common cultivator is the sulhij cultivator. In 

 this the parts that do the cultivating are attached to a frame 

 which is carried on wheels. It has two parts called gangs to 

 which the shovels or disks are attached. It can cultivate one 

 row at a time. There is usually a seat so that the workman 

 can ride and guide the gangs. There is a sulky cultivator 

 which has three gangs that can cultivate two rows at a time. 

 It is called a two-row cultivator. It can be used conveniently 

 only in large fields. 



