Effect of Alkali Salts in Soils on Crops 



41 



1,000 2,000 3,000 4,000 5,000 6,000 7,000 

 Concentration of salts in p. p. m. 



,000 9,000 10,000 



Fig. 44. — Curve showing the effect of concentration of salts on the height of plants from seeds of various 

 kinds. Average for sodium chlorid, sodium carbonate, and sodium sulphate. 



Sugar beets Wheat Com Field peas Oats Barley Alfalfa 



Fig. 45. — Curve showing the effect of sodium chlorid, sodium carbonate, and sodium sulphate on the 



height of plants from seeds of various kinds. Average for concentrations from 1,000 to 10,000 p. p. m. 



