94 TRANSACTIONS OF THE 
than half normal when the sodium chloride soil had 
received about 2,923 parts per millon, the sodium car- 
bonate soil 5,300 parts per million, and the sodium sul- 
phate soil 14,207 parts per million of salts in the unmixed 
treatments. 
It appears that the stage of growth reached by the 
plant before the alkali is brought in contact with it, has 
considerable influence on the injury that will be done 
to it. 
