ALKALI SALTS 



393 



Percentage Composition op Alkali Salts in Soils 





OH 





eo 

 ■jT 02 



n ^ 



2 a 



-il 



Billings, 

 Montana^ 



Yuma, 

 Arizona ^ 





+3 







5^ « 



02 



1 









KCl ... 

 K2SO4 . . . 

 K0CO3 . . 

 Na2S04 . . 



NaNOs . . 

 NasCOs . . 

 NaCl . . . 

 Na3HP04 . . 

 MgS04 . . 

 MgCl2. . . 

 CaCl2 . . . 

 NaliCO, . . 

 CaS04 . . 

 Ca(HC03)> . 

 MgiB.C0,)2 . 



(NIl4)2C03 . 



1.64 



33.07 

 6,61 



12.71 

 17.29 



21.48 



3.95 



25.28 

 19.78 

 32.58 

 14.75 

 2.25 



1.41 



5.61 

 9.73 



13.86 



36.72 



1.87 



16.48 



15.73 



1.60 



85.57 



0.55 

 8.90 



0.67 

 2.71 



21.41 

 35.12 



7.28 



4,06 



22.06 

 10.07 



4.00 



22.10 



81.15 



7,71 

 0.25 

 0.28 

 6.61 



13.77 



6.88 

 3.98 



21.02 

 32.25 



i Headden, W. P. The Fixation of Nitrogen. Colorado 

 Agr. Exp. Sta., Bui. 155, p. 10. 1910. 



^ Hilgard, E. W. Soils, p. 442. New York, 1906. 



^ Dorsey, C. W. Alkali Soils of the United States. U. S. 

 D. A., Bur. Soils, Bui. 35, p. 79. 1906. 

 4 Ihid., p. 103. 5 J5{^^^ p^ 109^ 



