212 



VEGETABLE GROWING PROJECTS 



standpoint of soil moisture and low temperature for the roots. 

 In heavy soils the depth of planting should be less, and then ridg- 

 ing may be practiced about midsummer so as to provide sufficient 

 soil for the development of the tubers. 



1. What are the proper distances foi- the planting of potatoes ? 



Fr : 91-93. Gi : 146-148. 



2. How deep should potatoes be planted in different types of soils ? 



Fr : 93-96. 



3. Describe the mechcmism and advantages of an approved potato 



planter. Fr : 98-104. 



Cultivating. — The potato requires just as thorough culti- 

 vation as any other 

 garden crop. The 

 surface of the soil 

 must be kept in a 

 fine, loose condition. 

 Weeders should be 

 used immediately 

 after planting until 

 the plants are at 

 least six inches high, 

 and then various 

 types of cultivators 

 may be employed. If 

 the cultivating is skill- 

 fully managed, very 

 few weeds will have a 

 chance to grow to any 

 considerable size. 



Fig. 55. — This illustration shows the potato leaf in 

 cross section, also a portion of the lower surface. 

 Note the vascular arrangement, also the large 

 airspaces, andstomata ("breathing spores"). A 

 film of the proper material protects this potato 



