ILLINOIS DAIRYMEN'S ASSOCIATION. 23 1 



Table 3. — Selection of Seed Corn for High Protein and High Oil. 



Protein Oil Selection 



No. Ear. in corn. in corn. coefficient. 



1 11.17 6.03 67.30 



2 12.66 4.90 62.00 



3 12.60 4.92 66.89 



4 10.85 4.55 49.80 



5 11.01 5.72 62.97 



6 11.50 4.77 54.81 



7 14.71 5.56 81.75 



8 10.07 4.73 47.62 



9 13.14 5.44 71.53 



10 10.19 5.80 59.10 



11 11.01 5.97 65.78 



12 10.39 4.73 49.13 



13 13.96 5.28 73.72 



Average 11.87 5.26 62.50 



For low protein and high oil we divide in the same manner, but use 

 the lowest puotients for selecting the best ears. 



Table 3 illustrates the value of this method as applied to the selection 

 of the best seed ears for both high protein and high oil. 



It will be observed that some ears which are high in only one de- 

 sirable constituent (see No. 2 and No. 10) must be discarded because the 

 selection coefficients which they give are even below the average; while 

 other ears which may be quite low in one constituent (see No. 1 and No. 

 3*) still furnish acceptable selection coefficients. 



The Breeding Plot. 



The 40 selected seed ears are planted in 40 separate parallel rows, 

 one ear to a row, consequently the breeding plot should be at least 40 

 corn rows wide and long enough to require about three-fourths of an ear 

 to plant a row. It is well to shell the remainder of the corn from all of 

 the 40 ears, mix it together, and use it to plant a border several rows wide 

 entirely around the breeding plot, to protest it, especially from foreign 

 pollen. 



In my judgment one of the most practical and satisfactory locations 

 for the breeding plot is in a larger field of corn planted with seed which 



