110 FIELD AND LABORATOEY STUDIES OF CROPS 



and from the weighings determine the per cent loss in the 

 peehngs. 



Weight of 



Whole 

 Potatoes. 



Weight of 



Peeled 

 Potatoes. 



Weight of 

 Peelings. 



Per Cent 

 of Waste. 



Large potatoes . 

 Small potatoes . 

 Rough potatoes , 



Discussion: The part of the potato which we eat — the 

 tuber — is an underground stem. Every tuber has a number 

 of eyes on the surface, each of which marks the location of a 

 bud. In some varieties the eyes are shallow while in others 

 they are quite deep, and in all varieties they are more numer- 

 ous toward the end of the potato which is attached to the 

 stolon. Practically all higher plants have some means of 

 storing up food which can be used at a time when they need 

 material to start growth from a dormant condition. For the 

 potato plant, the tuber serves as a storage organ for this 

 reserve food. 



