38 



APPLICATION OF PRINCIPLES TO FARM CROPS 



extent. The seed corn should be selected from the rows which 

 were detasseled. This seed corn will have received its pollen from 

 other plants and not from itself. 



3. Select seed corn before the main crop is harvested. This 



FIG. 28. Variable types of Johnson county corn, showing the need of close selection 

 at the time of saving seed corn. Compare with figure 29 to see the possibilities of careful 

 selection. (U. S. D. A.) 



FIG. 29. Prize-winning white dent corn of the Johnson county variety. Study the uni- 

 formity of the ears. (U. S. D. A.) 



should be done in the field after the corn is reasonably mature. 

 Select the ears which are drooping and otherwise show maturity. 

 Take ears only from stalks showing; a heavy yield. Attention 

 may also be given to all of the good points of the ears and the 

 kernels mentioned in the score card. Compare figures 28 and 29. 



