238 AGRICULTURAL ENGINEERING 



part of the equipment of the modern corn grower. The use 

 of the two-row cultivator is a question upon which opinions 

 of some of the best farmers differ. This indicates that, in 

 addition to the necessary field conditions mentioned, the 

 personal factor is one that makes for success or failure. 



Walking Cultivators. The walking cultivator is made 

 both with and without a tongue. The advantages of the 



tongueless kind are that 

 they are light and re- 

 quire less turning room 

 than the other. The 

 difference in cost is small. 

 On the other hand, the 



Fig. 147. A tongueless walking culti- tOngUeleSS Cultivator 

 vator with wooden gangs. 



works very well only 

 with a well broken 'and evenly-gaited team. 



Cultivator Construction. As one- and two-row cultivators 

 have many features in common, they will be discussed to- 

 gether. Perhaps the most important feature to be decided 

 upon in the selection of a cultivator is the shovel equipment. 

 Shovel cultivators are provided with from four to eight 

 shovels for each two gangs. By gang is meant the 

 beam, the shanks, and the shovels attached thereto. The 

 four-shovel cultivator is adapted to deep cultivation; 

 the six and eight to more shallow cultivation, covering the 

 space between the rows more thoroughly but less deeply. 

 With a large number of shovels and shanks, the gangs 

 become easily clogged with trash if the ground is not entirely 

 free from it. A compromise is represented by the six-shovel 

 cultivator, which is the most popular throughout the corn 

 belt. 



The cultivator beams are now quite generally made of 

 steel, although wooden beams may be purchased. Although 



