Grade. 

 Date. . 



EXERCISE 27 



POTATO TYPES AND VARIETIES 



Object. To become familiar with varieties and variety groups of potatoes. 



Explanation. Stuart divides potato varieties into eleven principal 

 groups. The same classification is given in Productive Farm Crops, Chap- 

 ter XXX. 



Directions. The class should have available varieties belonging to at 

 least six of the more important groups in the locality of the school. Describe 

 each variety according to the outline. If it is not known to which group a 

 variety belongs, see Stuart's description of that variety. For the color of 

 sprouts see same source, pages 4-5. To describe varieties use the terms 

 given in Productive Farm Crops, end of Chapter XXXI. 



Name of Variety 



Group 



Shape 



Siz 



Eyes 



Sprouts 



Skin 



Draw the long broadside view, natural size, of specimens of the four most 

 important groups in your locality, paying special attention to size and shape 

 of tuber; size, shape and distribution of eyes. Label parts carefully in the 

 right hand margin. 



Transverse Sections. Examine transverse sections of a tuber belonging 

 to each group, paying special attention to relative proportion of cortex, 



