LIFE SPAN OF SEEDS 



59 



O'OPEN ©:AIR-DRY, SEALED t^DRI ED OVER CaO, SEALED 



12 3 4 5 6 12 3 



YEARS OF STORAGE 



Figure 20. Deturioratiou of seeds at room temperature storage. Germination tests 

 made in ovens on moist filter pai>cr. 



ably would have improved their keeping qualities. At the same time 

 samples of all these, not shown in the curves, were stored at — 5° C (23° F). 

 At this temperature those in open storage and sealed storage without dry- 

 ing kept almost perfectly for six years, as of course did those in sealed 

 storage after drying. 



