CORN 



165 



(2) An ear whose germs are unusually small. 



Large germs are considered desirable, owing to the fact 

 that the}' are rich in oil and protein and therefore high in 

 feeding value. 





Fig. 70. — Kernels with small germs. 

 PURITY OF KERNELS 



(5) An ear having no mixed kernels. This ear should 

 have as nearly as possible all the desirable characters 

 hitherto studied. If the ear which was used in (2) of 

 this exercise has no mixed kernels, it may be used 

 here. 



(3) A yellow ear, having one or more mixed kernels ; 

 also a white ear, having one or more mixed kernels. 



A mixed kernel on 

 a yellow ear is known 

 by the fact that its 

 upper half shows the 

 pure white of ordi- 

 nary white corn. On 

 the other hand, a 

 mixed kernel on a 

 white ear is known 

 by the fact that it: 

 ordinary yellow corn. 



Fiu 



71. — All ear showing mixed kernels. 



lower half shows the yellow of 

 By looldng closely, this last may 



be seen between the rows of a white ear if mixed kernels 



are present. 



Mixed kernels show that pollen from another variety of 



corn has fertihzed certain kernels on the ear, that is, they 



