332 



Missouri Agricultural Report. 



rather than one long row, with the thought that the second, or 

 duplicate row, will serve much more effectively as a check. 



Here are curves showing the comparative yields of 25 ears of 

 corn as tested in 1905. The variation in yield is indicated by the 

 irregular line a-b for the one plot and c-d for the duplicates. Per- 

 haps I should call your attention to the general correspondence be- 

 tween these two curves. You will note that with two important 

 exceptions (ear 4 and 17) the ears behave, as compared with their 

 neighbor, very much the same in the two plots. This can hardly 

 help convincing one that heredity is more largely responsible for 



CHART I. 



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