X - 



O- 



Kr 



Planted immediately 

 Stored in O2 planted 

 I week later 

 Stored in N2 planted 

 I week later 



Seeds 4% moisture 



Gamma rays 



Figure 1. — Seedling height response of barley seeds irradiated from 

 10 to 60 Kr and then stored in N 2 and 2 for 1 week before planting. 



