PHYSIOLOGY OF THE DEVELOPMENT OF PLANTS 421 



Yarovisation likewise is of great significance in the northern 

 latitudes with a short summer, for it allows the cultivation in 

 these regions of important late varieties of wheat, oats, and 

 other crop plants. Yarovisation of millet, cotton, corn,' and 

 other thermophilous plants is also of great importance in allowing 

 the culture of these in more northern latitudes. 



it >rv«AM. 



Fig. 1325. 



The practical significance of yarovisation is increased by the 

 fact that this method not only accelerates the development of 

 crop plants but also increases their jdeld. 



The influence of yarovisation appears very early in the plants. 

 The seedlings from yarovised seeds grow more rapidly and more 

 uniformly, this by itself being of great advantage. An increavse 



