CEREAL EXPERIMENTS AT THE WILLISTON SUBSTATION. 



15 



A summary of the yields of twelve standard varieties of wheat at 

 Williston is given in Table VII. Seven of these varieties have been 

 tested for the entire period of seven years, two for six years, and three 

 for only two years. The average yields for each of these three 

 periods are shown. The varieties in Table VII are arranged accord- 

 ing to these groups. 



Table VII. — Annual and average yields of 12 varieties of spring wheat grown at -the 

 Williston substation for three different series of years between 190S and 1914. 











Yield 



per acre (bushels). 







Group, Cereal Investigations number, 



1908 



1909 



1910 



1911 



1912 



1913 



1914 



Average. 





1908 



to 



1914. 



1909 



to 



1914. 



1913 

 and 

 1914. 



Durum group: 



12.6 

 15.6 



39.1 

 37.4 



11.0 

 6.1 



8.9 

 8.2 



51.0 



49.7 



33.0 

 34.7 

 35.0 



28.7 

 28.7 

 28.2 

 22.2 

 29! 



25.0 



30.7 

 29.2 

 30.0 



53.8 

 47.2 

 54.6 



51.3 



47.9 

 49.2 

 40.4 

 52.5 



46.3 



47.5 

 46.3 

 42.5 



29.9 

 28.4 



32.8 

 30.6 



43.4 





41.0 





44.8 



Fife group: 



3697, Power 



13.1 

 11.3 



9.8 



34.0 

 34.2 

 31.2 

 33.2 



17.1 

 14.9 

 13.9 

 20.2 



11.1 

 10.2 



8.0 

 12.1 



44.7 

 46.0 

 44.7 



51.7 



28.6 

 27.6 



26.4 



31.2 

 30.3 

 29.2 

 30.0 



40.0 



3691, Red Fife 



38.3 



2873, Glvndon (Minn. No. 163)' 

 1517, Gtiirka 



38.7 

 31.3 







40.8 



Preston group: 



3698, Preston 





26.2 



35.1 

 35.9 



13.4 



11.1 

 11.0 



12.7 



10.9 

 9.2 



44.7 



42.3 

 42.3 



27.8 

 26.9 



28.1 



29.6 



29.0 



35.7 



Bluestem group: 



3083, Dakota (N. Dak. No. 316) 



3021, Havnes (Minn. No. 51) 



2874, Haynes (Minn. No. 169) 



16.7 

 14.2 



39.1 

 37.8 

 36.3 





















1 Previous to 1911 the Glyndon variety was grown from seed originally obtained from the Edgeley sub- 

 station in North Dakota; in 1911 and succeeding years it was grown from seed originally from the Minne- 

 sota Agricultural Experiment Station. 



For the period of seven years the Kubanka durum wheat (C. I. No. 

 1 140) made the highest yield, 29.9 bushels per acre. The Power fife 

 wheat was second in yield, with an average of 28.6 bushels. These 

 varieties also led for the 6-year period (1909 to 1914), during which 

 the Gliirka (C. I. No. 1517) and the Preston (C. I. No. 3698) were 

 included. Figure 6 shows graphically the annual and average yields 

 of the leading varieties within the four different groups for the six 

 years from L909 to 1914, inclusive. 



In 1913 the Taganrog (C. I. No. 1570), Marquis (C. I. No. 3641), 

 and Haynes (C. I.' No. 2874) were added to the test. The averages 

 for 1913 and It) 14 show that in the durum group the Taganrog 

 variety yielded more, than the Kubanka, and that in the Qfe group 

 the Marquis variety was better Mian the Power. 



The average dates of beading and of ripening, number of days 

 from planting to beading and to maturity, height, yield per acre, and 

 weight per bushel of grain for the varieties grown during the 6-year 



period (1909 to 1914) are shown in Table VIII. Figure 7 shows 



beads of eight representative varieties of the four groups of spring 

 wheat. 



