Breeders' and Growers' Association 117 



plot, and the other sample shall represent all ears which are 

 rejected by the mechanical examination. 



" (d) If the seed-corn is selected by chemical analysis for 

 improvement in composition, the composition must be deter- 

 mined of each individual seed ear which is planted in the breeding 

 plot. 1 ' 



2. THE BREEDING PLOT 



" (a) The breeding plot shall contain at least 25 rows of corn 

 which are at least 100 hills long. 



"(6) Each separate row of corn in the breeding plot shall be 

 planted with a separate individual ear. 



" (c) All rows, which show, as a whole, marked inferiority 

 and also every individual corn-plant which may show marked 

 inferiority, in whatever row it may be found, shall be carefully 

 detasseled before the pollen matures. 



" (d) The performance record of each individual field row shall 

 be determined, and this shall include an accurate determination 

 of the total weight of ear corn which the row produces.'' 



3. SELECTION OP SEED Rows 



" (a) The selection of seed-corn for the next year's breeding 

 plot shall be confined to 40 per cent of the field rows ; that is, 

 at least 60 per cent of the field rows must be rejected as a source 

 of seed for the breeding plot. 



"(6) The selection of the individual field rows from which 

 seed-corn may be taken shall be based upon the performance 

 record of the row as a whole, but with special reference to the 

 yield of corn which the row produces, which in all cases must be 

 ascertained by computation from at least 100 consecutive hills 

 and without rejecting vacant hills. 



"It is the intent of this association that its members shall 

 be actual breeders or improvers of corn and not mere growers or 

 producers of seed. While methods may vary somewhat as to 

 detail in accordance with the ideals of the individual members, 

 in their breeding operations, certain well-established principles 

 are recognized, fundamental among which are the following : 



