Corn Growers' Association. 



335 



satisfactorily in a small breeding plot (see Chart III), using one 

 ear (perhaps the best) as sire, planting it upon every other row. 

 Two to four different ears may be used as dams, an ear to a row, 

 detasseling, of course, every row, except the sire rows. In this 

 way three or four distinct crosses may be secured ; crosses in which 

 both parents are known, and their performance records as well. 



As this system continues, the performance records, not only 

 of sire and dam, but of grandsire and grand-dam — and on indefi- 

 nitely, are a matter of record. 



CHART III. 



THEORY AND PRACTICE. 



I come now to my third question — 



How much of the superiority, which we discover by means of 

 the ear-row test and attempt to perpetuate, can we hope to trans- 

 mit to subsequent generations ? 



In answer to this question, I want to call your attention to the 

 average yields of a duplicate ear-row test of 30 ears, conducted the 

 past season at the Ohio Station (Chart IV). 



Of these 30 ears 18 were /new selections from the field, and 

 consequently of unknown pedigree, and without performance rec- 

 ords ; 9 were pedigreed crosses from the breeding plot of the year 

 previous, sire and dam, and the performance records of both known, 

 while 3 were inbred pedigreed ears selected from the sire rows. 



The 9 pedigreed crosses are Nos. 33, 34, 38, 41, 42, 48, 51, 55 



