Corn Growers' Association. 



333 



the wide variations which we see than is environment; and yet 

 environment does enter, and hence the need for duplication. 



Basing our selection upon the first plot, the highest yielding 

 ears are 9, 17, 11 and 13. Based upon the yields of the same ears 

 in the duplicate plot, 13, 9, 11 and 23 would be chosen. Ear 17, 

 which stands second in yield in the first plot, is rejected by the 

 second. Ear 23 which stands fourth in the second plot, occupies 

 a much inferior position in the first. 



CHART II. 



4! 43 4S 41 41 S7 S3 SS S7 J~f 

 4o 4£ 44 4(> 48 J~o Si S4 si S8 Lb 



In Chart II we have shown the comparative yields of 30 ears, 

 as tested the past season. If we let plot one pick out the four win- 

 ners, we would lose ear 55, the highest yielding ear in plot two. 

 If we let plot two decide the matter, we would lose ear 48, the 

 highest yielding ear of plot one. By taking the average yields of 

 both rows, we probably get the four best ears, namely, 48, 34, 

 55 and 44. 



In order to show the value of the duplication of the work, per- 



