Arizona Agriculturai^ Experiment Station 



301 



provement promises well for the use of the drainage water for irrigat- 

 ing lands on the Indian reservation below. It would be inadvisable, 

 however, to apply the drainage water too soon on valuable lands, since 

 rapid and marked improvement may reasonably be expectel. 



TABLE XXII. COMPOSITION OE WATER EROM TEMPE DRAINAGE DITCH, 



PARTS PER 100,000 (by C. N. catein) 



MISCELLANEOUS 



The assertion has often been made that sorghum grown in arid 

 regions produced syrup of poor quality due to excessive mineral salts. 

 Recently a sample of sorghum syrup of apparently good quality pre- 

 pared from cane grown near Yuma was examined in this laboratory. 

 In the accompanying table a comparison is made of the Yuma product 

 with analyses reported in Wolff's Aschcnanalysen and Wiley's Foods 

 and Their Adulteration. The Arizona syrup contains less than half 

 as much mineral matter as Wiley's example, although it appears to be 

 about the same concentration. It contains only a little more mineral 

 matter than the average for raw sorghum sugar according to Wolff, 

 and very much less than the molasses from raw sugar. We presume 

 the samples reported by Wolff and by Wiley were produced in humid 

 climates. One striking feature of the ash of the Arizona syrup com- 

 pared with Wolff's sample is its relatively high sulphate content and 

 relatively low chloride content as shown in Table XXIII. 



TABLE XXIII. ASH CONSTITUENTS OF SORGHUM SYRUP AND SUGAR 



Solids 



Ash 



SO4 in ash 

 CI in ash. . . 



Wolff's Aschenanalysen 



Wiley's Foods 



Raw sugar 



Molasses from 

 raw sugar 



percent 



percent 



1.67 

 8.84 



5.85 



5.10 

 4.30 



5.74 



Sorghum syrup 



percent 



76.0 

 4.0 



Ariz. Station 



Sorghum syrup 



percent 



74.0 

 1.83 



15.26 

 3.31 



An interesting instance of water of opposite character and nicely 

 adjusted supply from the same well comes to us from near Toltec in 

 the Casa Grande Valley. The owner has installed a small pump with 



