BULB CROP PROJECTS 237 



6. Give specific directions for the fertilizing of your onion ground. 



Estimate your needs. 

 L: 163-164. C:311. W-VG : 387-389. 



7. What kind and how much fertilizer is used for onions in the leading 



districts of the United States f 



8. Suggest various combinations of fertilizer materials, specifying the 



amounts required of each. 



Fig. 60. — Onion sets of various types and sizes. 



7. Planting sets. — Sets are used in large quantities for the 

 growing of bunching onions. They are also generally employed 

 by home gardeners for the production of mature bulbs, and to a 

 considerable extent by commercial growers for an early crop of 

 bulbs. Better results are obtained from sets than from seed in 

 soils which. are not very well adapted to the culture of onions. 



It is customary to plant sets two or three inches apart (or closer if 



