GERMINATION TEST OF SEED CORN 215 



until after the test is completed. Number the ears from one 

 to one hundred. Commencing at the left end of the row, 

 remove six kernels from each ear two near the butt, two 

 near the middle, and two near the tip. These kernels may 

 be pulled out with the aid of a penknife and without injury 

 to the kernels. Place the six kernels from ear No. 1 

 in the sand of the germinator tip downward in square No. 1. 

 Place the six kernels from ear No. 2 in square No. 2 in a 

 similar manner. Place the kernels from all other ears which 

 are to be tested in a like manner in the germinating tester in 

 squares assigned to them. Keep the germinating tester 

 moist and at a temperature of from 70 to 85 F. In five 

 or six days the test should be complete. If the temperature 

 has been below 70 F. much of the time, a longer period 

 for the test will be required. Remove the kernels from the 

 tester and count the number that germinated from each ear. 

 Record on the squares of the diagram on the next page the 

 number of kernels that germinated from each ear. 



QUESTIONS 



1. What per cent of ears shows perfect germination? 



2. What per cent of the kernels tested shows perfect germination? 



3. How many acres of corn will one hundred ears plant after 

 the ears have been tipped, butted, and graded, assuming that one 

 fourth of each ear is rejected for seed, if the rows are planted forty- 

 two inches apart and the kernels twenty-one inches apart in the 

 row? (Use figures determined in Ex. 20 for size of ear.) 



4. How many ears are necessary to plant sixty acres of corn? 



5. How many bushels are necessary to plant sixty acres of corn, 

 counting seventy pounds of ear corn to the bushel? 



6. How much time is actually required to perform the work of 

 the germination test for one hundred ears ? 



7. How much time is required to perform the work of the ger- 

 mination test for sixty acres ? 



