Apr. 28.1933 
T oxicity and Antagonism of Alkali Salts in Soil 
329 
the sulphates are present the divergence of the curves is roughly equal to 
the toxicity of the carbonate. 
The values for the binary and ternary mixtures given in the middle 
and right sections of figure 8 arrange themselves in fairly regular order 
•••• HCl /9L0NE 
- KCl /iLOA/E 
000 /VJz Cl /9L0NE 
HCf\ 
O’*®* No. 
- %.KCl-^k-HCZ\ 
000- ^AfaCU^ECl] 
- \ 
00— 
+A/a.2. ^0^ 
A/a^ CO^ 
Fig. 9.—Diagram showing the effect on the growth of wheat plants of adding chlorids in various propor¬ 
tions to Greenville loam impregnated with sodium carbonate. The m ax imum concentrations of the 
individual chlorids are given in the text. 
in accordance with the separate toxicities of the components, the indi¬ 
viduality of these materials being essentially maintained even in the 
most complicated mixtures. 
30618—23-^5 
