152 SUGAR BEET SEED. 



in the mothers? In the recent writings of Strohmer 

 and Stift, they declare that the mothers during the 

 second year's growth produce large quantities of new 

 organic substances; the root has not within itself suf- 

 ficient resources; these must be furnished. Phos- 

 phoric acid is utilized in the production of the stems 

 and leaves, and nitrogen for the seed. 



