IMPROVEMENT OF GHIRKA SPRING WHEAT. 
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tAYNES 
The season of 1908 was a favorable one in regard to rainfall at all 
the stations here considered. Rather conflicting results were ob- 
tained with the Ghirka wheat at the different stations. The prin- 
cipal agreement in the tests was the outstanding yield of the Kubanka, 
surpassing the other varieties of wheat at Williston, Brookings, 
Highmore, and Newell, and equaling the yields of the Haynes and 
Ghirka Spring for first 
place at Moccasin and 
Dickinson, respect- 
ively. The Ghirka 
outyielded the other 
varieties at Edgeley, 
but, on the other 
hand, gave the lowest 
yield at Brookings, 
Highmore, and New- 
ell. The exception- 
ally low yield of the 
Ghirka at Highmore 
and Brookings was 
due, in part at least, 
to rust. The average 
yield at the seven 
stations showed Ku- 
banka first, Rysting- 
Glyndon second, 
Haynes third, and 
Ghirka fourth. 
The season of 1909 
was unusually favor- 
able at all the sta- 
tions. Kubanka 
durum wheat gave the 
highest yields at Moc- 
casin, Williston, Dick- 
inson, Edgeley, and 
Newell. The Ghirka 
led at Brookings and 
Highmore, ranked second at Moccasin, third at Williston, and fourth 
at Dickinson, Edgeley, and Newell. Under the humid conditions of 
this year rust again . caused a reduction in the yield of the Ghirka. 
For all stations the Kubanka ranked first, Ghirka second, Haynes 
third, and Rysting-Glyndon fourth. 
The dry season of .1910 reduced the yields at all stations, and the 
results were entirely different from those obtained in previous years. 
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>09 
19.79 
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13.57 
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07~ 
1697 
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928 
I 
Fig. 3.— Diagram showing the average yields of four varieties of 
spring wheat and the annual and seasonal precipitation at seven 
experiment stations in the northern Great Plains area for the 
7-year period from 1908 to 1914, inclusive. 
