28 



BULLETIN 430^ U. S. DEPAETMENT OF AGEICULTUEE. 



varieties to be highest, the early varieties ranking second. The 

 early varieties have matured about August 1 and the naidseason and 

 late varieties about August 14. The one late variety which was 

 grown, Black Tartarian, usually ripened prematurely, so that the 

 date recorded for it is earlier than normal. The early varieties 

 averaged about 24 inches in height and the midseason and late 

 varieties about 28 inches. The weights per bushel are for two years 

 and are higher for the midseason and late varieties than for the 

 early ones. However, all weights are above the legal standard of 

 32 pounds per bushel. The ratio of grain to straw is about 1 : 1 for 

 the early varieties, while for the midseason varieties the ratio is 

 about 1 : 1.35. A plat of early oats at the station is shown in figure 

 10. The yields from the leading varieties of each group are shown 

 graphically in figure 11. 





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Fig. 11. — Diagram showing the average yields of five varieties of oats on the Cheyenne Experiment Farm, 



1913 to 1915, inclusive. 



Table XVII. — Average dates of heading and maturity, height, weight per bushel, yield, 

 and ratio of grain to straw of eight varieties of oats groiun on the Cheyenne Experiment 

 Farm, 1913 to 1915, inclusive. 



Oroup and variety. 



C.I. 

 No. 



Date of — 



Height. 



Weight 



per 

 bushel .1 



Yield per acre. 



Heading. 



Maturity. 



Grain. 



Straw. 



165 

 459 



134 

 619 

 492 

 714 

 731 



768 



July 7... 

 ...do 



July 20.. 

 July 21.. 

 ...do 



Aug. 1... 

 July 31.. 



Aug. 13 . 

 Aug. 14 . 

 ...do 



Inches. 

 23 

 24 



28 

 25 

 28 

 28 

 28 



26 



Lbs. 

 34.5 

 33.5 



36.5 

 37.7 

 39.5 

 37.2 

 37.0 



38.2 



BusTl. 

 23.7 

 23.1 



29.6 

 27.8 

 27.6 

 27.0 

 26.7 



22.5 



Lbs. 

 805 

 715 



1,230 

 1,120 

 1,233 

 1,063 

 1,065 



967 



July 20.. 

 July 21.. 



...do 



Aug. 12 . 

 Aug. 16 . 



Aug. 14 . 



Ratio, 

 grain to 

 straw. 



Early: 



Sixty-Day 



Klherson , 



Midseason: 



Swedish Select . 



Colorado No. 37. 



Ligowo 



Silvermine 



Abundance 



Late: 



Black Tartarian 



1 :1.06 

 1: .97 



1 : 1. 30 

 1:1.26 

 1 : 1.40 

 1:1.23 

 1 : 1. 25 



1 : 1.34 



1 Average for two years only. 



The leading varieties of oats to date are the Swedish Select 

 (C. I. No. 134) and Colorado No. 37 (C. I. No. 619) of the midseason 

 group, and the Kherson (C. I. No. 459) and Sixty-Day (C. I. No. 165) 

 of the early group. The Kherson and Sixty-Day were the leading 

 varieties in 1913 and 1914, but were reduced in yield by hail in 1915. 

 It is believed that these two varieties and the Swedish Select are 

 the best ones to grow in eastern Wyoming. 



