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AGRICULTURAL ENGINEERING 



The accumulative drop, on the other hand, provides seed 

 cells in the seed plate large enough to contain only one kernel 

 at a time. The hill is formed by receiving in a receptacle 

 the desired number of kernels from as many cells. The 

 accumulative drop would appear at once to be the more 



Fig. 142. A modern corn planter with long shoe furrow-openers, vari- 

 able drop, and open wheels. 



accurate of the two types, and it may be demonstrated that 

 it is, when seed corn graded to size is used. As the cell in 

 the accumulative drop is made to contain one kernel only, 

 it is evident that great care must be used in making the cell, 

 and even then there will be difficulty in caring for odd-shaped 

 kernels whose volume may not be much different from the 

 average. These ill-shaped kernels are those from the butts 

 and tips of the ears, and when an accumulative drop planter 

 is used they must be discarded. 



