26 BULLETIN 430, U. S. DEPARTMENT OF AGEICULTURE. 



which prevailed, the 3-peck and 4-peck rates yielded 27 bushels and 

 the 5-peck rate 28.5 bushels per acre. The average yield of the three 

 plats was 27.5 bushels per acre. When compared with spring barley 

 or oats it is seen that spring emmer has not yielded as well as either 

 of these crops during the 3-year period. 



WINTER SPELT. 



Only one variety of winter spelt has been tested at Archer, and 

 that for only one year. On September 11, 1913, a tenth-acre plat 

 was sown to Red Winter spelt. A good stand and a fair fall growth 

 resulted, but the plants were entirely winterkilled. Spelt will prob- 

 ably never be an important crop in this area. 



EXPERIMENTS WITH OATS. 



WINTER OATS. 



Only one variety of winter oats has been tested at Archer. On 

 September 11, 1913, a tenth-acre fallow plat was sown to the Bos- 

 well Winter variety. A good stand and a fair fall growth resulted. 

 The plants were all killed, however, during the ensuing winter, and 

 winter oats have not since been grown. Oats are much less winter 

 hardy than wheat and there is no likehhood that they will succeed 

 as a winter crop in this section of the Great Plains area. 



SPRING OATS. 



The value of the oat crop in Wyoming is gTeater than that of any 

 other cereal. A large proportion of the crop is grown under irriga- 

 tion. Fairly good yields are obtained on the dry lands, however. 



VARIETAL EXPERIMENT. 



Fifteen varieties of spring oats have been tested at the Cheyenne 

 Experiment Farm during 1913, 1914, and 1915. The aimual and 

 average yields of these varieties are shown in Table XVI. The oat 

 varieties were grown in tenth-acre plats on breaking in 1913, in tenth- 

 acre plats on fallow in 1914, and in duphcate twentieth-acre plats 

 on double-disked corn ground in 1915. 



In 1913 the seed bed was poor, the summer dry, and yields low. 

 The Sixty-Day (C. I. No. 165) was the highest yielding variety, with 

 15.8 bushels per acre. In 1914 the seed bed was good, the summer 

 dry, and yields low. The Kherson (C. I. No. 459) was the highest 

 yielding variety, with 27.5 bushels per acre. In 1915 the seed bed 

 was good, the spring and summer wet, and jdelds good. The Abun- 

 dance (C. I. No. 731) was the highest yielding variety, with a yield of 

 52.4 bushels per acre. Oats do best in a cool, moist climate, which 

 accounts for their better yields in 1915. 



