Arizona Agricultural Experiment Station 



565 



has been quite promising, did not make as satisfactory a growth 

 as in 1920, although it yielded a good crop of seed. Bitter 

 vetch planted with barley competed with it to such an extent 

 that the barley crop was reduced materially. 



t--^ -W 



Fig. 2. — Salt River Valley Farm: Field peas as a green winter 

 manure crop. 



Cowpeas planted in midsummer in Mexican June corn 

 made an excellent growth and can be relied upon to increase the 

 value of the corn crop for either silage or pasture. 



Inoculation tests with cowpeas gave no conclusive results. 



The vegetative growth of a number of varieties of soybeans 

 was satisfactory, but the beans produced were very poor in 

 quality, being shriveled and unmarketable. At the present 

 time we are cooperating with the United States Forage Crop 

 Office in making varietal tests of about twenty varieties of soy- 

 beans, and also in making tests with four of these varieties to 

 determine the best time for planting. Plantings have been made 

 at intervals of two weeks, beginning April 1, and continuing 

 until August 15. This test is preliminary to a more extensive 

 one for next year, which, we hope, will enable us to determine 

 the causes of previous failures with soybeans and perhaps will 

 give information that will finally lead to the successful handling 

 of this crop under southern Arizona conditions. 



