VERNALIZATION EXPERIMENTS WITH FORAGE CROPS 11 



Soja max: Percent 



(Biloxi soybean) 136 



(Manchu soybean) 130 



(Peking soybean) 100 



Sorghum vulgare sudanense (Sudan grass) : 45 



Sorghum vulgare saccharatum (sorgo) 40 



Trifolium incamatum (crimson clover) 130 



Trifolium pratense (red clover) 126 



Vicia monantha (monantha vetch) 96 



Vicia pannonica (Hungarian vetch) 101 



Vicia sativa (Oregon common vetch) 100 



Vigna sinensis (Groit cowpea) 137 



SUMMARY 



Seed of white lupine, crimson clover, hairy vetch, and Austrian 

 Winter field pea vernalized or started into growth by the addition 

 of moisture and then kept for a period of 40 days at 0° C, when 

 subsequently planted came into flower and fruit, while seed not so 

 treated remained in the vegetative stage or came into bloom at a 

 later date. Seed of white sweetclover and red clover showed no 

 response, but this may have been due to insufficient treatment. 



Seed of foxtail millet, Sudan grass, soybean, and crotalaria mois- 

 tened and kept for a period of 5 to 9 days at high temperatures showed 

 in most cases decreased vigor and in no case did such treatment 

 advance the time of maturing. 



Seed moistened and started into growth activity and subsequently 

 dried started into growth sooner than seed not so treated. 



