44 



BULLETIN 1039', U. S. DEPARTMENT OF AGBICULTURE. 



pound rate. The net increase for the 30-pound rate is only about 0.5 

 bushel, which probablj^ is not significant. However, these experi- 

 ments were all conducted on a well-prepared seed bed, and probably 

 the results from the 15-pound rate are better than would be obtained 

 under ordinary seed-bed conditions. The best rate of sowing for flax 

 on dry land at Newell probably is about 2 pecks (28 pounds) per 

 acre. The data from the rate-of-seeding experiments are shown in 

 Table XXXI. 



Table XXXI. — Yields of flax « grown in rate-of-seeding experiments on dry 

 land on the Belle Fourche Experiment Farm in 1912 and from 1915 to 

 1918, inclusive. 



Rate of seeding per acre. 



Yields per acre (bushels). 



1912 



15 pounds . . 

 22i pounds . 

 30 poimds . . 



9.6 

 'ii.'2' 



23.6 

 25.6 

 27.0 



8.2 

 8.4 

 7.2 



7.8 

 7.8 

 7.4 



9.2 

 7.9 

 9.5 



Average. 



1915 to 

 1918 



12.2 

 12.4 

 12.8 



1912 and 



1915 to 



1918 



11.7 



12.5 



a. Common flax used in 1912; Primost, C. I. No. 12, in 1915 and 1916; and Damont, C. I. No. 3, in 1917 and 

 1918. 



Table XXXII. — Yields of flax groivn in date-of -seeding experiments on dry 

 land on the Belle Fourche Experiment Farm, 1912, 1913, and 1915 to 1919, 

 inclusive. 





Yields per acre (bushels). 



Date of seeding. 



1912 



1913 



1915 



1916 



1917 



1918 



Average, 

 1917 to 

 1918. 



April 20 to 25 









(a) 

 6.3 



5.8 

 5.3 

 5.5 



9.2 

 10.8 

 11.4 



7.5 



May 2 to 8 





7.7 



20.0 



8.0 



May 15 to 20.. .... 



8.3 



8.4 



May20to25 



4.8 

 3.0 



21.5 

 C) 



6.9 







10.6 



4.2 



6.5 



5.4 









o Early seeding blown out. b Did not emerge. 



DATE-OF-SEEDING EXPERIMENTS. 



Date-of-seeding experiments with flax were conducted in 1912, 

 1913, and 1915 to 1918, inclusive. The Primost variety (C. I. No. 

 12) was grown in 1912, 1913, and 1915 and Damont (C. I. No.. 3) 

 in 1916, 1917, and 1918. Sowings were made on two, three, or four 

 dates each season. The dates of seeding were not the same each, 

 year, because the soil frequently was too wet when the sowings 

 should have been made. Because of the variable seasons and the 

 irregularities in the experiment it is difficult properly to summarize 



