CEREALS OX THE BELLE FOUECHE EXPERIMENT FAEM. 
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, 191k to 1917, inclusive, an-d 
in 1919. 
C.I. 
No. 
Date of— 
Height, a 
Weight 
per 
bushel. 
Yields per acre. 
Group and variety. 
Full 
bloom.a 
Maturity. 
Seed. 
Straw. 
European seed: 
3 
8 
12 
July 13 
July 11 
July 10 
Aug. 6 
Aug. 5 
Aug. 4 
Incites. 
20 
20 
20 
Pounds. 
54.3 
54.5 
54.3 
Bushels. 
12.6 
11.0 
11.1 
Pounds. 
1,027 
N. Dak. Resistant No. 52 
Short fiber: 
Prirnost (Minn. No. 25) 
949 
891 
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). 
1916 1917 1918 1919 Average 
15 pounds.. 
22£ pounds . 
30 pounds . . 
45 pounds . . 
10.7 
10.2 
11.0 
15.2 
14.2 
17.7 
21.1 
23.7 
23.4 
10.7 
13.2 
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 
