Oct. 4, 1915 
Effect of Alkali Salts in Soils on Crops 
33 
The effect of individual salts is shown in figure 32. A comparison of 
this graph with figure 27 shows that the dry matter is affected by the 
Fig. 32.—Curve showing the dry weight of wheat plants germinating in College loam, Greenville loam, 
and sand containing various salts. Average for all concentrations. 
salt in just about the same way as the germination. The greater relative 
toxicity of the carbonates in sand than in loam is again brought out. 
Fig. 33.—Curve showing the effect of various combinations of salts in different concentrations on the 
amount of dry weight produced. Average of 15 combinations of each 3 salts. 
The action of each three salts used together is shown in figure 33. 
With the exception of potassium carbonate, sodium carbonate, and am- 
