LIFE OF SEEDS 



105 



In all of the six tests, eight species out of twenty-two failed to germi- 

 nate; and of the remaining fourteen species, seeds of eight, possibly 

 nine, germinated often when they had been buried thirty years. The 

 acorns (Quercus rubra) buried near the bottles of seeds were all dead 

 at the end of two years. 



Average Yields of Garden Seed-Crops 



The average crop is probably 10 to 20 per cent less than the figures 

 given in the first column. 



