Aug. 14, 1916 



Agricultural Value of Impermeable Seeds 



7°i 



of the other 40 per cent of the seeds impermeable. When more than 40 

 per cent of the seeds in a lot were impermeable the percentage of seedling 

 production was greater than the percentage of chamber germination; 

 when less than 40 per cent were impermeable, chamber germination 

 exceeded seedling production. We see here undoubtedly the combined 



-K/M0 OF SEED AMD TEST NUMBER 



Fig. 5.— Curves of the seedling production in the field in i6to i8days and of the germination in chamber 



in 8 days. 



effect of two separate conditions: First, a larger percentage of the 

 impermeable seeds germinated in the field than in the chamber; second, 

 some of the seeds which germinated in the soil did not produce seedlings 

 which penetrated the overlying soil and were counted. 



