Arizona Agricultural Experiment Station 



261 



August, 1916. This land was planted to Sudan grass in the middle of 

 August at the rate of 20 pounds to the acre. This was cut October 28, 

 and an estimated yield of 30 tons of cured hay was obtained. 



Because of space taken up by a roadway, and by fences, the actual 

 size of the alfalfa yield was slightly less than 14 acres. After having 

 been summer plowed dry, as given above, this land was prepared for 

 irrigation in September and October, and seeded to Hairy Peruvian 

 alfalfa October 24, 1915, at the rate of 17 pounds per acre. The first 

 cutting was made in the middle of March, and was mostly bur clover 

 and volunteer wheat. The second cutting was excellent hay, though 

 it contained a large proportion of volunteer wheat. The remaining four 

 cuttings were all very excellent alfalfa. A total yield of 89 tons 

 (measured) was obtained. 



No trouble was encountered from Johnson grass in either the 

 wheat or the alfalfa. 



Table VI gives a brief summary of the costs of operations on the 

 various fields, the sizes, and the returns therefrom. The third to the 

 eighth fields inclusive were within the Johnson grass eradication experi- 

 ment, and our main efforts were directed toward the control of this pest 

 rather than financial profit. 



TABLE VI. operations, FIELDS, AND RESULTS OBTAINED ON THE SALT 

 RIVER VALLEY FARM AT MESA, 1916 



It is the plan to continue the same methods of Johnson grass con- 

 trol on these same fields until the pest seems to be well in hand. 



