148 VEGETABLE GROWING PROJECTS 



employed, and more space is allowed by growers who need not 

 economize in area and who, perhaps, cultivate the crop with a 

 horse. The plants should be shifted to the open ground with the 

 least possible disturbance of the roots. 



1. What temperature conditions are most suitable for growing 



lettuce ? W-VG : 354. 



2. What are the effects of hot weather on lettuce ? W-VG : 354. 



3. How far apart should lettuce be planted ? 



W-VG: 357. L:115. C:275. 



4. When should the plants be set in the open ground ? W-VG : 357. 



12. Sowing in the garden. — The great commercial areas of 

 lettuce are grown from seed sown in the open ground. It is 

 customary to make the rows twelve to fourteen inches apart and 

 to thin the plants to about a foot apart in the row. The seed 

 should be covered by not more than one fourth inch of soil. The 

 thinning may be done very rapidly with common hilling hoes, 

 cutting out the weak and surplus plants. 



1. Where is the seed sown for the large commercial plantations ? 



W-VG : 357. 



2. What methods are employed in sowing and thinning, and how 



far apart should the plants stand? W-VG : 357. C : 277. 



13. Companion cropping. — Lettuce ia very generally employed 

 as a companion crop. Its use with cabbage is described in W : 102. 

 Various combinations are given in W-VG : 477, 478, 480, 482, and 

 488. 



