268 ELEMENTARY AGRICULTURE 



do not sprout well within four or five days, the ears of 

 the corresponding numbers should be discarded from 

 your seed corn supply. 



4. In testing your father's seed corn, a box thirty-six 

 inches square and three inches deep will enable you to 

 test much more rapidly. (See also paragraph 13.) 



5. Kernels for planting should be of uniform size so 

 that the planter will drop the same number regularly. 

 Shell the kernels from the tip, the butt, and some from 

 the middle of the ear and keep them in separate piles. 

 Place three grains from the middle of the ear on a sheet 

 of paper close together. Draw a circle around them with 

 a pencil as closely as possible. Remove the grains and 

 place three from the butt or from the tip in the ^ame 

 circle. Do they fill the circle? What bearing does this 

 have upon the corn planter? 



6. If a farmer increases his crop of corn six bushels 

 per acre by careful selection of his seed, how much more 

 income would he get from 45 acres when corn sells at 

 50 cents per bushel? 



7. If a bushel of seed corn will plant 7 acres, what is 

 the cost per acre when seed corn is $2.00 per bushel? 



8. If com is planted in check rows 3 feet, 8 inches 

 apart each way, how many square feet does each hill of 

 corn occupy ? How many hills on an acre ? 



Answers : 14 4/9 square feet ; 3,240 hills. 



9. If 6 of the 10 kernels taken from an ear of corn 

 that is being tested grow, what per cent does the ear 

 germinate ? 



10. Twenty full sized ears of corn will usually plant 

 one acre. If 2 of the ears will not grow, what per cent 

 of the corn will be missing in an acre? In your field? 



