The Seed in Plant Production 



383 



that the reverse condition is true; that is, seed from points 

 south give a better yield than northern grown seed of that 

 strain. In general, adjusted local varieties are best. 



MODIFICATIONS INDUCED IN WHEAT BY ITS ENVIRONMENT 



227. Localization of seed production. - - In many cases 

 it is not possible to explain the localization which charac- 

 terizes commercial seed production, and it would appear 

 that seeds are grown in particular regions to-day, not only 

 because of some apparent advantages of the region with 

 respect to the maintenance or development of desirable 

 hereditary qualities, but also because of such factors as 

 (1) cheapness of production in the locality, (2) the effects 

 of conditions upon maturity and curing, referred to later, 

 or else (3) from merest accident. It would be well if 

 more general recognition were given to the two underlying 

 principles. On the one hand there are regions, or locali- 

 ties, especially favorable for the production of high quality 

 in seeds ; on the other hand, it is often the case that 

 local seed production and seed selection would have 



