124 MASS. EXPERIMENT STATION BULLETIN 161. 



those from the hmed half, aUhough they did not show the thickened, 

 dwarfed forms obtained in some of the water cultures. 



The results of this work point to an effect of the lime on the soil con- 

 stituents, by which the root environment is improved, rather than to an 

 effect within the plant bj' the absorption of a larger amount of calcium 

 salts. 



