THE PRODUCTION OF PLANTS 



47 



injured. Unbleached cotton, tobacco shading cloth, 

 or wooden lath may be employed for this purpose, 

 but the lath so arranged as to give about one-half 

 shadow and one-half sunshine is most desirable. 



Transplanting. — The young plants of celery are 

 greatly benefited by transplanting. So long as the 

 seedlings remain undisturbed in the plant bed they 

 develop a central straight root with few laterals. 

 In transplanting, this straight root becomes broken 

 and as a result a large mass of rootlets are formed 

 which work near the surface and feed the plant. 

 The transplanting process also provides uniform 

 space and development, rendering the plants better 

 able to withstand the setting in the ^ open field or 



FIG. l6^EFFECT OF TRANSPLANTING UPON THE ROOT SYSTEM OF 

 CELERY PLANTS 



