CEEEAL EXPERIMENTS AT THE WILLISTON/ SUBSTATION. 



17. 



Table VIII. — Average growth data, yields per acre, and weight of grain per bushel for 

 nine varieties of wheat at the Williston substation, 1909 to 1914, inclusive. 



Group, Cereal investigations num- 

 ber, and variety. 



Average date. 



Headed. Ripe. 



To maturity 

 from — 



Plant- 

 ing. 



Head- 

 ing. 



Height. 



Yield 

 per 

 acre. 



Weight 



per 

 bushel. 



Durum group: 



1440, Kubanka 



3693, Arnautka 



File group: 



3697, Power 



3694, Red Fife 



2873, Glvndon (Minn. No. 163).. 

 1517, Griirka 



Preston group : 



3698, Preston 



Bluest em group: 



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

 3021, Haynes (Minn. No. 51) 



Julv 

 ...do. 



Aug. 3 

 ...do 



July 

 ...do. 

 Julv 

 Julv 



July 11 



July 13 

 ...do.... 



Aug. 4 

 ...do...., 

 ...do.... 

 July 30 



Aug. 2 



Aug. 6 

 ...do.... 



Day. 

 105 



105 



107 

 106 

 107 

 102 



103 



108 

 107 



Days. 

 26 

 26 



24 

 24 

 22 

 23 



Inches. 

 39 

 39 



35 

 36 

 35 

 35 



Bushels. 

 32.8 

 30.6 



31.2 

 30.3 

 29.2 

 30.0 



28.1 



29.6 

 29.0 



Pounds. 

 62.0 

 61.5 



60.8 

 58.6 

 58.2 

 60.7 



60.7 



57.4 

 57.1 



Table VIII shows that the date of heading is earlier for the durum 

 than for the other groups, but they require a longer period from 

 heading to maturity and ripen at about the same time. They also 



I- 1';. 7 Heads of representative varieties of the four groups of spring wheat grown at the Williston sub- 

 station: Durum group— Kubanka (1) and Arnautka (2); preston group— Preston (3); fife group — 

 Ghirbi (4), Rysting (5), and Marquis (6); bluestem group— Crossbred (7) and Haynes (8). 



grow tallest and have the heaviest bushel weight. The Ghirka and 

 the Preston are the earliest maturing varieties. The bluestem varie- 

 tiea head and ripen later than the varieties of the other groups. 

 They ;il- ( > have the lowest bushel weight. 



95887°- Bull. 270—15 3 



