CEEEAL EXPERIMENTS ON THE CHEYENNE EXPERIMENT FARM. 



27 



Table XVI. — Annual and average yields of 15 varieties of spring oats grown on the 

 Cheyenne Experiment Farm in 1913, 1914, and 1915. 





C.I. No. 



Yield per acre (bushels). 



Group and variety. 



1913 



1914 



o 1915 



3-year 

 average. 



Early: 



Sixtv-Day 



165 

 459 

 170 



134 

 619 

 492 

 714 

 731 

 495 

 741 

 738 

 767 

 769 

 732 



768 



15.8 



c 12.5 



13.0 



10.0 

 7.2 

 10.5 

 11.3 



7.5 

 12.2 

 5.7 

 5.0 

 8.3 

 7.8 

 5.8 



7.8 



25.6 



c 27.5 



24.5 



26.7 

 24.7 

 23.6 

 22.5 

 20.3 

 22.5 

 21.3 

 21.3 

 19.7 

 21.4 

 13.9 



18.8 



6 29.9 

 b 29. 3 

 6 26.5 



52.1 

 51.5 

 48.7 

 47.2 

 52.4 

 45.0 

 47.2 

 45.0 

 39.3 

 33.1 

 32.4 



41.5 



23.7 



Khprsnn . 



23.1 





21.5 



Midseason: 



Swedish Select 



29.6 



Colorado No. 37 



27.8 





27.6 



Silvermine 



27.0 



Abundance . 



26.7 



Probsteier 



26.5 



Siberian 



24.7 



T.inroln 



23.7 



National 



22.4 



Montana 



20.7 



Rannpr 



17.3 



Late: 



Black Tartarian 



22.5 







a Average of 2 twentieth-acre plats. 

 b Damaged about .30 per cent by hail. 



f Average of 6 tenth-acre check plats. 



Oat varieties are usually grouped into early, midseason, and late 

 varieties. In Table XVII are presented the average data on dates 



Fig. 10.— .\ plat of oiit.s on spring plowing on llii-. Cheyeiuio Kxpwinieut Farm in 1915. ( I'hotograph 

 lent by the Office of Dry-Land Agriculture Investigations.) 



of heading urid maturity, height, weight ])cr l)ush<'l, yic^ld per acre, 

 and ratio of grain to straw for the leading varieties of each group at 

 Archer during tlie y>-yeur jx^riod, 1013 to 1015, iiichisiv<\ 



The; curly varieties gave Ix^ttci' yields in \\)\'.\ and 1014 than the 

 jnidseason or late varieties. In 101.'), liowevcr, tlu*, midseason 

 varieties gave the high(^st yields, tiie early varieties being damaged 

 by hail. The average yields for tliree- years show the midseason 



