666 Thirty-second Annual Report 



Velvet beans did not prove satisfactory, due largely to 

 the extreme difficulty in securing stands. Examination failed 

 to show nodules on the roots of the velvet beans and it is pos- 

 sible that inoculation will be necessary to produce satisfactory 

 growth. 



Tepary beans proved a most excellent green manure crop 

 for the Salt River and Yuma valleys. These beans, planted at 

 the rate of one bushel to the acre, grew eighteen to twenty-four 

 inches high and the yield was estimated at twelve to fifteen tons 

 weight per acre. 



IV. A STUDY OF THE VARIETIES AND METHODS OF CULTIVATION OF 

 INDIAN CORN AND THE VARIOUS SORGHUMS 



Of the various sorghums tested in 1920 hegari proved the 

 most valuable from the standpoint of feed. Milo gave a slightly 

 larger yield of threshed grain, but, because of greater fodder 

 value, hegari is better liked by the average farmer. Feterita 

 proved considerably inferior to either milo or hegari, and 

 white milo proved a little inferior to ordinary dwarf yellow milo. 



Sumac sorghum made an excellent silage crop, being 

 slightly superior in leafiriess to Orange sorghum, and because it 

 is lighter and more easily handled, it Is more satisfactory for 

 silage than either Gooseneck or Honeydrip; these two latter 

 varieties, however, will give larger tonnage. 



Mexican June corn, or selections of it, proved superior to 

 other varieties of corn, particularly in the Salt River Valley. 



v. THE CULTIVATION AND FIELD MANAGEMENT OF EGYPTIAN COTTON 



This project has been carried almost entirely on the Salt 

 River Valley Farm near Mesa. In the fertilizer tests the fol- 

 lowing results were secured: 



Yield in pounds 

 Treatment of seed cotton 



per acre 



Barnyard manure 5 tons 1076 



Barnyard manure 10 tons 1005 



Barnyard manure 10 tons and 



acid phosphate 300 lbs 875 



Acid phosphate 250 lbs 893 



Acid phosphate 500 lbs. and 



nitrate of soda 200 lbs 1225 



Acid phosphate 500 lbs 964 



Acid phosphate 500 lbs. and 



cottonseed meal 450 lbs 1130 



Nitrate of soda 200 lbs 820 



Nitrate of soda 600 lbs 1124 



Commercial cotton fertilizer 918 



Cottonseed meal 700 lbs 856 



Check — no treatment 981 



