66 
BULLETIN 1039, U. S. DEPARTMENT OE AGRICULTURE. 
feet in diameter, mostly in a plat of Xortli Dakota Resistant Xo. 52. 
was made almost bare by wilt in 1916. The same land had produced 
flax in 1914. 
VARIETAL EXPERIMENTS. 
Varietal experiments with flax on irrigated land were begun in 
1912. Ten varieties have been grown, three of them during each of 
the eight years. Five varieties were grown during the six years from 
1914 to 1919. inclusive. All varieties were of the blue-flowered, 
brown-seeded type. The yields of the flax varieties are shown in 
Table XLIX. The average yields of five varieties are also shown 
graphically in figure 22. 
Table XLIX. — Yields of flax varieties groicn on irrigated land on the Belle 
Fourelie Experiment Farm. 1912 to 1919. inclusive. 
C.I. 
Xo. 
Yields per acre (bushels). 
Group and variety. 
1912 
1913 
1914 
1915 
1916 
1917 
191S 
1919 
Average. 
1912 ' 1914 
to to 
1919 1919 
European seed: 
Russian (N. Dak. No. 60S") 
1 
3 
17 
19 
8 
3.7 
11.8 
Damont (X. Dak. No. 1215). . 
14.5 
10.7 
15.1 
21.7 
10.7 
14. i 
Frontier (Russian ) 
10.1 
12.5 
11.9 
11.3 
5.3 
4.8 
10.0 
5.8 
14.1 
13.6 
12.7 
10.7 
13.6 
12.9 
19.1 
20.8 
11.9 
12.2 
12.4 
11.6 
13.6 
N. Dak. Resistant No. 52 
12.7 
Short fiber: 
N. Dak. Resistant No. 114 
13 
12 
7 
30 
11.1 
11.6 
1.5 
12.4 
12.9 
6.5 
9.0 
11.4 
10.0 
15.5 
20.5 
8.6 
12.2 
"life" 
10.9 
Primost (Minn. No. 25 > 
Turkish: 
Turkish 
11.1 

5.3 
4.4 
12.7 
6.0 
4.1 
1 
The Damont and Reserve varieties have produced the highest 
yields, the former averaging 14.1 bushels and the latter 13.6 bushels 
per acre. Both of these varieties are rather tall, with medium-large 
seeds. The Primost and Xorth Dakota Resistant Xo. 114 varieties 
belonging to the short-fiber group have short stems and small, dark- 
brown seeds. Xeither of the wilt-resistant varieties grown produced 
the highest yields, because of the almost total absence of wilt. 
The two varieties of the Turkish group, Turkish and Smyrna, 
which were grown in the experiments produced relatively low yields 
and were almost too short to harvest with the binder. 
Table L shows the average dates of heading and maturity, height, 
weight per bushel, and yields of seed and straw of three varieties of 
flax grown from 1914 to 1919. inclusive. The Damont was one and 
two days, respectively, later than the Xorth Dakota Resistant Xo. 52 
and Primost varieties. The average height apparently is the same 
