180 LABORATORY MANUAL OF AGRICULTURE 



13. Of the lower valve ? 



14. Does the lower valve counteract the speed of the team ? 



15. Can the width of the row be varied ? 



16. What is its greatest width ? 



17. What is its least width ? 



18. How is the reel attached and driven ? 



19. How is the number of kernels in each hill determined ? 



20. Do the plates rotate continuously in accumulating a hill ? 



21. Do the plates revolve vertically or horizontally? 



22. Has the planter sight feed ? 



23. Can the planter be arranged to drill the corn ? 



24. Adjust the planter for drilling and to drop one kernel every 

 eighteen inches. After properly adjusting the planter for this 

 rate of drop, measure off a stretch of one hundred feet on the bare 

 ground and pull the planter over this distance to determine the 

 accuracy of drop. 



