32 



BULLETIN 270, U. S. DEPARTMENT OP AGRICULTURE. 



only two of the seven years, and in these two years the differences 

 were very slight. It has also yielded more than the Manchuria (C. I. 

 No. 638) in only two years, 1910 and 1914, but in both cases the 

 difference has been considerable. The Success has yielded more than 

 Williston No. 170 and Manchuria (C. I. No. 638) in only one of the 

 seven years. 



The unsatisfactory yields of the 2-rowed varieties may be due in 

 part to an unfortunate choice of varieties. However, their perform- 

 ance thus far does not warrant recommending them for this section 

 or describing them in detail in this bulletin. 



NURSERY TESTS OF BARLEY. 



A considerable number of varieties and stocks of barley have been 

 grown in the nursery at Williston. All the varieties grown in the 

 field plats, as well as a number of others, were grown in the nursery. 

 The greater part of these varieties, as in the field tests, were 6-rowed 

 and 2-rowed bearded hulled barleys, but 2-rowed and 6-rowed 

 bearded naked and 6-rowed hooded naked varieties were also included. 



The number of varieties in each class, with the average number of 

 days from seeding to maturity, height, length of head, number of 

 stools and of heads per plant, weight of 1,000 kernels, and weight of 

 straw and of grain from a rod row for each class in 1912 and 1913 are 

 shown in Table XVII. 



Table XVII.- 



Average miscellaneous data for the various classes of barley grown in the 

 nursery at the Williston substation in 1912 and 1913. 



Class. 



Num- 

 ber of 

 races. 



Days 

 to ma- 

 turity. 



Height. 



Length 

 of head. 



Stools 



per 

 plant. 



Heads 

 per 



plant. 



Weight 

 of 1,000 

 kernels. 



Yield from rod 

 row. 





Straw. 



Grain. 



Bearded hulled: 



30 

 27 



9 

 5 



3 



91 

 92 



86 

 85 



87 



Inches. 

 29.5 

 29.0 



25.3 

 24.1 



30.0 



Inches. 



' 2.50 



3.15 



2.35 



2 AX 



2.59 



7.59 

 9.50 



7.39 

 7.32 



6.77 



5.90 

 7.46 



5.30 

 5.44 



4.40 



Grams. 

 40.5 

 45.1 



37.7 

 49.8 



45.1 



Grams. 

 521 

 589 



514 

 513 



522 



Grams. 

 459.5 



Two-rowed 



430.9 



Bearded naked: 



362.1 





372.1 



Hooded naked: 



348.2 







The naked varieties, as shown in Table XVII, mature somewhat 

 more quickly and, with the exception of the hooded forms, have 

 shorter straw than the hulled varieties. The 2-rowed hulled varieties 

 stool more freely and produce more and longer heads than those of 

 any of the other classes. The weight of 1,000 kernels is greatest 

 for the 2-rowed naked varieties, exceeding that of the 2-rowed hulled 

 by 4.7 grams. The yield of straw per row was greatest from the 

 2-rowed hulled class, while the yield of grain was largest from the 

 6-rowed hulled varieties. 



