SEEDING MACHINERY 127 



the furrow opener. The corn may be either caught here 

 a single grain at a time or a full hill at a time. When the 

 check wire throws the valve open to let a hill out, it 

 closes in time to catch the next hill. 



With the double valve, the hill is caught twice in its 

 transit from the seed box to the ground. Fig. 93 shows 

 one style of triple-valve arrangement. 



The lower valves are made quite close to the ground 

 and arranged to discharge backward and downward 



FIG. 94 THE STUB-RUNNER FURROW OPENER 



into the furrow to overcome the tendency to carry the hill 

 on and make uneven checking. 



173. Furrow openers. The curved runner is used on a 

 large majority of planters as a furrow opener. It is easy 

 to guide, but will not penetrate trash or hard soil as well 

 as some others. The curved runner is illustrated in 

 Fig. 89. 



The stub runner has good penetration and will hook 

 under trash and let it drag to one side out of the way. 



