16 



CIRCULAR NO. 116, BUREAU OF PLANT INDUSTRY. 



The alfalfa was planted August -20. When the alfalfa is to be 

 planted on very sand)' soils, disking is not generally advisable, as it 

 increases the likelihood of soil blowing. Satisfactory stands and 

 root growth were obtained, and the crop went into the winter in 

 good condition. 



WHEAT VARIETIES. 



During the past two years, 9 varieties of spring wheat have been 

 grown, one plat only to each variety. Of these 9 varieties. 4 are of 

 red wheat, 4 are of white, and 1 is of the durum type. The durum 

 wheat has been discarded, as there is no local market for it. The 

 highest average yield for the white wheat during the two years was 

 obtained with the Defiance, which produced 39.8 bushels per acre. 



Fi<;. l. A plat of Defiance wheat in the irrigated rotations. This plat yielded at the 

 rate of 52.5 bushels per acre. The average yield of the six wheat plats in the irri- 

 gated relations was 46.2 bushels per acre. The Defiance averaged highest in the wheat 

 variety tests in 1911 and 1012. 



In 1912 the same variety yielded 49.7 bushels per acre in the variety 

 test and as high as 52.5 bushels per acre in the rotation experiments 

 (fig. 4). The highest yielding red wheat was the Bluestem. which 

 averaged 37.5 bushels per acre. 



OAT VARIETIES. 



Eight varieties of oats have been tested for two years, one plat to 

 each variety, all of them being of the open-panicle type. Seven of 

 these are white and medium early; one, the Sixty-Day or Kherson, 

 is yellow and early maturing. In the variety tests, the highest 

 yielding variety of white oats is the Colorado No. 37. which aver- 

 aged 00.3 bushels per acre for the two years. The Sixty-Day, or 

 Kherson, averaged 58.5 bushels per acre. The difference in the time 

 of ripening of the early and the medium early was 12 to 10 days. 



[Cir. 116] 



