Arizona Agriclltural Exi'Krimicnt Station 419 



trol of black arm during the seedling stage. Tests were made to 

 determine the effects of planting every third row to cowpeas in- 

 stead of planting by the common methods. Various inoculating 

 media were used in these tests for comi)arison with plantings of 

 the same variety without inoculation and the wide spacing of cotton 

 without cowpeas. The largest yield secured from any planting was 

 that from the acre planted in the ordinary manner except that 

 every third row was omitted. 



VI. CULTIVATION AND M.VNAGEMENT OF WINTER AND SPRING GRAINS 

 INCLUDING WHEAT, OATS, AND BARLEY. 



Some of the work in this project was carried on on the Salt 

 River Valley Experiment Farm. Plantings of wheat included rate 

 of planting tests, and date of planting tests, as well as variety tests. 

 Early Baart wheat for average conditions proved the best of the 

 varieties tested. Good yields were secured from a locally developed 

 strain of Red Turkey wheat. Kanred, the best hard winter wheat 

 of central Kansas, did not prove the equal of the Early Baart or 

 local Turkey wheat. Durham wheats made a good yield, but are 

 difficult to market, consequently their usefulness is limited. 



A very striking and successful demonstration was given in the 

 control of stinking smut or bunt. One plot of wheat planted from 

 untreated seed showed 66 percent of smut infection, while the plot 

 planted with treated seed showed less than one-half of 1 percent 

 infection. 



Common six-row barley proved superior to the other varieties 

 tested. 



Abruzzi rye made a very large growth of straw and produced a 

 fair quality and yield of rye. Red rust-proof Texas oats were the 

 best oats tested. 



VII. EFFECT OF DYNAMITING SUB-SOIL ON FIELD CROPS. 



This project was handled on the Sulphur Spring Valley Dry- 

 Farm. During the season of 1919 no difference was found in the 

 yield of sorghum produced on the dynamited or undynamited 

 ground. 



VIII. A VARIETAL AND CULTURAL TEST OF GRAIN AND FORAGE CROP ANE 

 OF GRASSES AND MISCELLANEOUS CROPS. 



Under this project tests were made with Smilo grass, Napier 

 grass, Rhodes grass, Harding grass, rice, flax, and a number of 

 other crops. All of these tests were of a preliminary nature and 

 are incomplete. 



