1917] Ayres: Nutrient Solution on Plants Grown in Sand Cultures iUU 



Cm. r 



100 



% K2S04 



Fig. 8. — Graph showing the influence upon height of equal quantities 

 of K2SO4 in the different groujis of series III. 



Cm. 

 110 



100 

 90 

 80 

 70 

 60 - 

 50 



40 



30 



20 



20 



30 



40 



50 



60 70 



Dg. total concentration 

 Fig. 9. — Graph showing the influence upon height of total concentration 

 in series III. 



