42 



BULLETIN 1039, U. s. DEPARTMENT OF AGRICULTURE. 



The average yield of Kharkof winter wheat during the five years 

 was 1,800 pounds per acre. Kherson oats yielded at the rate of 1,415 

 pounds per acre, Hannchen barley 1,405 pounds, and Kubanka spring 

 wheat at the rate of 1,378 pounds per acre. Other cereal crops 

 yielded less than the spring wheat. The period from 1913 to 1917 

 was usually favorable for winter wheat, but this crop, although 

 rather uncertain, may be expected to yield more than other cereals 

 on the average. The yields in pounds per acre of well-adapted 

 varieties of spring wheat, oats, and barley are nearly the same. 

 The Manchu Brown kaoliang, because of its resistance to early 

 drought, outyielded all other crops in 1917. In 1916 the Red Rus- 

 sian proso produced more grain than the other crops. This was 





/S 







P/^/MOST- 



Fig. 13. — Diagram showing tlie average yields, in bushels per acre, of the leading varieties 

 of flax on dry land at the Belle Fourche Expei-iment Farm for the 6-year period from 

 1914 to 1919. inclusive. 



partly because the kaoliang was frosted, while the other crops were 

 injured by rust, soil blowing, or drought. 



EXPERIMENTS WITH FLAX. 



Flax is a crop usually grown on new sod land. However, when 

 grown in rotation on land fairly free from weeds it can be grown 

 successfully on land which has been previously cropped. The yields 

 of flax at Newell have compared rather favorably with the small 

 grains when the value of the crop is considered. Flax is less certain 

 than the small grains, as it is more easily injured by drought, frost, 

 and soil blowing. 



VARIETAL EXPERIMENTS. 



The varietal experiments with flax were begun in 1912. Twelve 

 varieties have been grown in plats on drj^ land during the period 



