IMPROVEMENT OF GHIRKA SPRING WHEAT. 7 
Kubanka led in yield, the Rysting ranking second and Ghirka third. 
At the other stations, under severe drought conditions, the yields de- 
creased from the north to the south, no yields being obtained at 
Highmore and Newell. At Williston and Dickinson the Ghirka again 
yielded considerably better than the other wheats, but did not retain 
this advantage at the stations farther south. Early rust, as well as 
drought, reduced its yield at Brookings. For all stations, however, 
the Ghirka ranked first, Kubanka second, Rysting-Glyndon third, 
and Haynes fourth. 
The annual and seasonal precipitation at each station for the seven 
years is given in Table II. The averages of these data are included 
also in figure 3, to aid in the interpretation of the yield data. 
Table II. — Annual and seasonal (April to July, inclusive) precipitation at seven experi- 
ment stations in three States of the northern Great Plains area, 1908 to 1914, inclusive. 
Station. 
Precipitation (inches). 
1908 
1909 
1910 
1911 
1912 
1913 
1914 
Aver- 
age. 
Moccasin, Mont.: 
Annual 
Seasonal 
Williston, N. Dak.: 
Annual 
Seasonal 
Dickinson, N. Dak. 
Annual 
Seasonal 
Edgeley, N. Dak.: 
Annual 
Seasonal 
Brookings, S. Dak.: 
Annual 
Seasonal 
Highmore, S. Dak.: 
Annual 
Seasonal 
Newell, S. Dak.: 
Annual 
Seasonal 
All stations: 
Annual 
Seasonal 
21.49 
10.57 
13.49 
7.00 
19.48 
10.46 
17.07 
9.24 
32.34 
19.60 
22.37 
12.50 
14.23 
7.84 
20.07 
11.03 
22.97 
13.96 
11.74 
9.05 
21.26 
11.53 
15.14 
10.55 
22.34 
10.64 
18. ( 
52 
17.73 
12.75 
18.46 
11.00 
15.26 
6.50 
10.28 
5.48 
13.34 
8.35 
12.21 
4.01 
12.78 
6.74 
11.15 
12. 55 
5.76 
12. 51 
6.25 
21.15 
7.69 
13.69 
5.70 
15.73 
5.99 
15.47 
6.87 
24.95 
10.62 
15.87 
5.41 
6.64 
1.92 
16.21 
6.31 
a 15. 00 
a 7. 93 
16.33 
10.20 
a 19. 06 
a 12. 46 
21.84 
15.59 
23.18 
14.95 
11.16 
6.00 
16.09 
8.07 
17.72 
10.96 
14.96 
9.32 
14.28 
5.63 
11.93 
5.31 
19.82 
9.06 
16.58 
10.69 
12.46 
12.53 
5.66 
14.65 
7.75 
15.67 
9.38 
18.47 
11.98 
22. 74- 
16.79 
18. 05 
13.23 
24. 15 
14.09 
17.52 
11.98 
11.70 
6.74 
18.33 
12.03 
b 18. 58 
i>9.57 
14.04 
7.86 
» 17. 41 
*>9.74 
17.09 
22.33 
12.47 
15.51 
8.57 
13.07 
6.97 
17.15 
9.28 
a These precipitation data are excluded from the average because the crop was destroyed by hail. 
b Average for only 6 years, excluding 1912. 
In 1912 the varieties at Moccasin and Dickinson were destroyed by 
hail and no yields were obtained, although very favorable conditions 
existed until the hail occurred. At Williston, under similar favorable 
conditions, unusually large yields were obtained. At Edgeley and 
Brookings the conditions were fair, while at Highmore and Newell the 
third successive droughty year occurred. The Ghirka slightly out- 
yielded the Kubanka at Williston and also led the other varieties at 
Highmore and Newell. At the latter station it was the only variety 
of the four that produced grain, thus showing again its drought- 
resisting ability. Kubanka produced a yield a third greater than the 
other varieties at both Edgeley and Brookings, due largely to the 
