CEREALS ON THE BELLE FOURCHE EXPERIMENT FARM. 



67 



for all three varieties, but in general Primost is somewhat shorter 

 than the other two. The weight per bushel of the three varieties is 

 about the same. 



Table L. — Average agronomic data of three varieties of flax grown on irrigated 

 land on the Belle Fourche Experiment Farm, 1914 to 1917, inoliisive, and 

 in 1919. 





C.I. 



No. 



Date of— 



Height.a 



Weight 



per 

 bushel. 



Yields per acre. 



Group and variety. 



Full 

 bloom.i 



Maturity. 



Seed. 



Straw. 



European seed: 



3 



8 



12 



July 13 

 July 11 



July 10 



Aug. 6 

 Aug. 5 



Aug. 4 



Inches. 

 20 

 20 



20 



Pounds. 

 54.3 

 54.5 



54.3 



Bushels. 

 12.6 

 11.0 



11.1 



Pounds. 

 1,027 

 949 



891 



N. Dak. Resistant No. 52 



Short fiber: 







a Average for 1915, 1916, 1917, and 1919. 

 NURSERY EXPERIMENTS. 



Several varieties of flax were grown in 17-foot rows under irriga- 

 tion for preliminary testing during the 5-year period, 1915 to 1919. 

 None of these yielded as well as varieties already being grown in 

 plats. Some selections of Smyrna flax, C. I. No. 30, were made in 

 1915 to increase the height of the variety. Strains of the parent type 

 1 to 2' inches higher than the parent variety were isolated, but the 

 yields were not sufficiently large to justify their being increased. 



RATE-OF-SEEDING EXPERIMENTS. 



Rate-of-seeding experiments with Damont flax on irrigated land 

 were begun in 1916 in single fiftieth-acre plats. In 1917, 1918, and 

 1919 the experiment was triplicated. Good yields were obtained in 

 all years. The flax was sown at three different rates during each of 

 four years, with an additional rate in 1918. The yields are shown 

 in Table LI. 



Table LI. — Yields of Damont flax grown in rate-of-seeding experiments on irri- 

 gated land on the Belle Fourche Experiment Farm, 1916 to 1919, inclusive. 



Rate of seeding per acre. 



Yields per acre (bushels). 



1917 



1918 



1919 



15 pounds . . 

 22J pounds . 

 30 pounds . . 

 45 pounds . . 



10.7 



13.8 



10.2 

 11.0 



15.2 

 14.2 



17.7 

 21.1 

 23.7 

 23.4 



10.7 



13.7 

 13.8 



15.7 

 15.6 



The highest average yield was obtained from the seeding of 30 

 pounds per acre. The 45-pound rate yielded 0.1 bushel per acre 



