SALAD CROP PROJECTS 143 



organic matter is highly essential as is also a liberal and constant 

 supply of soil moisture. Soils naturally fertile should be selected 

 if possible. The sandy types are always preferred, and especially 

 for compact heading varieties which thrive only in well-aerated 

 soils. 



1. What are the soil requirements for growing lettuce ? 



W-VG:355. C:275. 



2. Have you a favorable soil for growing this crop ? 



3. In what parts of the country is lettuce grown on muck soils f 



4. What is the nature of the soil in the large greenhouses where lettuce 



is groum for market? W-VF : 210. 



5. Describe the soil conditions of the gardens in your community 



where the crop is successful. 



3. Choosing varieties. — Lettuce growers should become 

 thoroughly familiar with the classification of \'arieties as de- 

 scribed in W : 140. In the selection of varieties, all depends on 

 market demands, soil adaptation, climates conditions, and the 

 season of the year when the crop is wanted. In the New England 

 and eastern states the compact heading varieties, and there are 

 many good ones, are grown almost exclusi\ely, while in western 

 sections the well-known loose heading variety. Grand Rapids, is 

 largely grown. So many excellent varieties are found among 

 home and commercial growers that an extended discussion would be 

 required to cover the subject in a satisfactory manner. Students 

 are urged to consult the references, local gardeners, seedsmen, and 

 others who may be familiar with the requirements oi climate, 

 soil, and market of the locality. 



