VERNALIZATION ENPERLMENTS WITH FORAGE CROPS 6 



seed and additional water was added to keep the percentage relatively 

 constant. The amount of moisture added to the seed in all cases was 

 determined by weight and expressed as a percentage of the air-dry 

 seed. 



Figure 1.— White lupine. The vernalized plants (B) are in pod and well matured while the check plants 



(A) show no sign of bloom. 



For cold treatment of seed, an ordinary refrigeration room main- 

 tained at a constant low temperature (0° C.) was used. _ For high- 

 temperature treatment a small electric oven thermostatically con- 



