+ BULLETIN 1192, U. S. DEPARTMENT OF AGRICULTURE. 
Fic. 2.—Heads, chaff, and kernels of Nodak (Kubanka 
No. 98) durum wheat. Heads and chaff, natural 
size: kernels magnified 3 diameters. 
the limited quantity of seed 
available. In 1920 the lower 
yielding strains were discarded, 
leaving 30 of the higher yielding 
and more rust-resistant ones. 
A few of these were discarded 
after 1921, and the 22 remaining 
were grown in triplicated 16-foot 
rows: ? —Kubankas (CC. beiigs 
1440) was used as a check at 
regular intervals. 
In 1919 19 of the most 
promising selections were grown 
in one one-hundred-and-forty- 
fourth acre plats and in subse- 
quent years in larger plats. 
Because of superior rust resist- 
ance and high yields during the 
rust epidemic of 1916, selections 
Nos. 58 and 98 were increased 
from the start and have been 
grown in the regular varietal 
plats each year since 1918. The 
number of selections grown in 
larger plats was increased from 
time to time until 1922, when 
eight of them were grown in 
triplicated one-thirty-second 
acre plats. 
In the spring of 1918, at the 
request of L. R. Waldron, a 
portion of each of the 143 pure 
lines was sent to Fargo for 
testing there. The entire series 
was grown in 1918 and 1919. 
In 1918 only individual rows 
were grown, but in 1919 the 
rows were replicated. Certain 
of the more promising selections 
were grown in replicated rows 
in the years following and com- 
parable yields obtained. The 
most promising strains were in- 
creased and grown in replicated 
plats, from which results were 
recorded in 1921 and 1922. A 
few of the Kubanka selections 
were grown in replicated plats in 
1922 at the Northern Great Plains 
Field Station, Mandan, N. Dak., 
at the Edgeley Substation, Edge- 
ley, N.Dak.,and at the Judith Ba- 
sin Substation, Moccasin, Mont. 
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