IMPEOVEMENT OF GHIEKA SPEING 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 obtamed at 

 Highmore and Newell. At Williston and Dickinson the Ghirka agam 

 pelded 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-Gljmdon third, 

 and Haynes fourth. 



The annual and seasonal precipitation at each station for the seven 

 3'ears 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 



Moccasin, Mont.: 



Annual 



Seasonal 



Wniiston.N. Dak.: 



Annual 



Seasonal 



Dickinson, N. Dak.: 



Annual 



Seasonal 



Edgeley, N. Dak.: 



Annual 



Seasonal 



Brookings, S. Dak.: 



Annual I 32. 34 



Seasonal i 19. 60 



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 



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 



18.03 

 8.52 



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 

 6.93 



12.55 

 5.76 



12.51 

 6.25 



21.15 

 7.69 



13.69 

 5.70 



1.5. 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 



2.3.18 

 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 

 8.59 



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 



>> 18. 58 

 6 9.57 



14.04 



7.86 



b 17. 41 

 6 9.74 



17.09 

 9.79 



22.33 

 12.47 



15.51 



8.57 



13.07 

 6.97 



17.15 

 9.28 



a Theso precipitation data are excluded from the average because the crop was destroyed by hail. 

 b Average Tor 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 

 cxi.sted until the hail occurred. At Williston, under similar favorable 

 conditions, unusually largo yields were obtained. At Edgclcy and 

 Brookings the conditions were fair, while at Iligluuorc and Newell the 

 third HUcr;ossive droughty year occurred. Tlie Ghirka slightly out- 

 yielded the Kubanka at Williston and also led the other varieties at 

 Highmore and New(;ll. At the latt(5r station it was the only variety 

 of the four that f)ro(luced grain, thus showing again its drought- 

 resi.sting ability. Kubanka producf^d a yield a third gn^atc^r than the 

 other varieties at both li^dgeley iind I>r()()l<iiigs, (hie- largely lo the 



