56 BIJLLETI^ir 1039, U. S. DEPAETMEXT OF AGRICHLTUBE. 



varieties grown from 1912 to 1919, inclusive. The results for 1918 

 are not included. During this i^eriod the Sixty-Day variety matured 

 7 days earlier than Canadian, 10 days earlier than Swedish Select, 

 and 18 days earlier than White Russian. The Sixty-Day oat was 

 also shorter and had a lower weight per bushel than the other 

 varieties. 



RATE-OF-SEEDING EXPERIMENTS. 



Silvermine oats were grown in rate-of -seeding experiments at 

 Xewell in 1918 and 1919. The seed was sown at four different rates, 

 viz, 6, 8, 10, and 12 pecks per acre, in triplicated fiftieth-acre plats. 

 The yields are shown in Table XLI. 



Table XLI.— rie?r/.s- of Sili'ermine oats grown in rate-of-seediriff experiments on 

 irrigated land on the Belle Fourche Experiment Farm in 1918 and 1919. 



Rate of seeding per acre. 



Yields per acre (biishels). 



1918 1919 



Average. 



6 peeks 77. 1 j 5S. 5 67. 8 



Specks 79.9 61.7 70.8 



lOpeeks 73.2 I 64.6 68.9 



12pecks 69. 6 I C3. 3 66. 5 



The 8-peck seeding gave the highest yield in 1918 and the 10-peck 

 seeding in 1919. The yields were good and quite uniform in both 

 seasons. The average yield from the 8-peck seeding was 70.8 bushels 

 and from the 10-peck seeding 68.9 bushels per acre, with the 6-peck 

 and 12-peck seedings yielding slightly less. At Xewell 8 pecks per 

 acre seems to be sufficient seed for Silvermine oats, but for greater 

 certainty of crop the seeding of 10 pecks per acre would be desirable. 



EXPERIMENTS WITH BARLEY. 



VARIETAL EXPERIMENTS. 



Eleven varieties of barley have been grown on irrigated land at 

 Xewell. None of these were grown during all of the eight years from 

 1912 to 1919, but four varieties were grown continuously for six 

 years. The yields iif' general were not very large, but good crops 

 were harvested in 1915, 1917, and 1918. The yields are shown in 

 Table XLII. 



The Chevalier II variety produced the highest average yield, 38.5 

 bushels per acre, from 1914 to 1919, inclusive. This variety also 

 ga\^ the highest yield during the three years 1917 to 1919. A head 

 of Chevalier II barley is shown in figure 19. The Trebi variety 

 yielded nearly as well. The former is a late 2-rowed barley which 

 is able to develop fully in the presence of sufficient soil moisture. 



