90 LABORATORY MANUAL OP AGRICULTURE 



than those maturing later, and corn growing in districts of 

 light rainfall has a more shallow kernel and a smoother 

 surface than varieties growing in districts with an abundance 

 of rainfall. Varieties of corn may also differ in color, some 

 being white, some yellow, and some red. The sample of 

 corn used for judging should contain ten ears of the same 

 variety. 



Equipment. 1. One ten-ear sample of corn for each 

 member of the class. 



2. A foot rule. 



3. A tape line. 



Directions. Number the ears from one to ten. Com- 

 mence with ear number one and place in the first vertical 

 column of the score card the scores that the ear merits. 

 Deduct from the perfect score for all deficiencies of the ear. 



Description of Points of the Score Card 



Shape of Ear. A desirable type of ear should be nearly 

 cylindrical. This will permit an equal number of rows from 

 butt to tip of ear, with kernels quite uniform in size. The 

 rows should run straight the entire length of the ear, and the 

 ear should present a uniform shape. If the ear is poor in 

 shape, the score for shape should be decreased. 



Length of Ear. The length of ear may be determined 

 by measuring from the extreme butt to the extreme tip. 

 If the ear is below the standard, it should be scored off accord- 

 ing to the deficiency. If it is too long, it is likely to have 

 broad and shallow kernels, with an inferior butt and tip, and 

 the score should be reduced accordingly. 



