SOIL ANALYSES 



31 



SURFACE CRUST OF SOIL FROM KERN ISLAND, BAKERSFIELD, CALIFORNIA. 



ANALYSIS BY HILGARD.' 



Potassium sulphate, 



Sodium sulphate, 



Sodium chloride. 



Sodium carbonate, 



Magnesium sulphate. 



Magnesium carbonate. 



Calcium phosphate. 



Calcium sulphate, 



Ferric and aluminum oxides, 



Silica, 



Organic matter and water of crystallization, 



Per Cent. 



•52 



82.96 



.48 



.40 



•50 



•13 



.20 



.10 



•30 



1-34 



4.07 



ALKALI FROM THE VALLEY OF THE RIO GRANDE IN NEW MEXICO : ANALYSIS 



BY GOSS AND GRIFFIN '^ MADE FROM THREE SAMPLES FROM 



DIFFERENT LOCALITIES. 



No. 3- 



Insoluble matter 



Portion soluble in water 



Composition of soluble portion. 



Potassium oxide 



Sodium oxide 



Calcium oxide 



Magnesium oxide 



Aluminum 



Sulphates 



Chlorides 



Carbonates 



Water of crystallization and organic matter 



Per cent. 

 75-59 



4-71 



3772 



5-57 



.98 



3-24 



10.16 



4796 



Trace 



.44 



74.24 

 25-76 



3-57 



28.97 



6.60 



1-55 



0.00 



47.72 



4-58 



Trace 



8.04 



34-40 

 65.60 



.21 



31-38 



7.92 



1.05 



0.00 



52.67 



1.20 



Trace 



584 



The composition of the impregnating salts producing the black alkali 

 is shown by the following analysis of alkali salts from soil near Fresno, 

 California. ^ 



Per cent. 



Potassium chloride, 1.30 



Sodium sulphate, 18.23 



Sodium chloride, 35-93 



Sodium carbonate, 18.72 



Sodium bicarbonate, 25.72 



Phosphoric acid, .lo 



1 Hilgard, E. W. Report of Work of the Agricultural Experiment Stations 

 for the year 1900, p. 97. 



^Goss and Griffin. Bull. No. 22, New Mexico Agric. Exp. Station, p. 26, 

 March, 1897. 



"Means T. H. and Holmes, J. G. Soil survey around Fresno, Calif. Field 

 Operations of the Division of Soils, U. S. Dept. of Agriculture. Second Report, 

 P- 373. 1900. 



