28 



BULLETIN 297, U. S. DEPARTMENT OF AGRICULTURE. 



Y/£cD £>£/? AC/?£. 



XHARKOF- , 



DUftUM SPP//VG 



KUBA/VK4 



COMMON SP/fWS. 



POWE/? F/FE 



HAY/VES BLUESTE/M. 



MAA/CMUWA 



again sown in duplicate rows in the fall of 1912, while a few of which 

 there was sufficient seed were sown in fiftieth-acre plats. A view of 

 the winter-wheat nursery in 1910 is shown in figure 8. 



The average yields of the selections in duplicate 60-foot rows in 

 1910, 1912, and 1913 varied from 32 to 65.8 ounces. Most of the 

 selections yielded between 48 and 60 ounces. A few beardless races 

 which were selected proved to be particularly high in yield. The 

 average yield of all nine beardless races was 56.2 ounces, while the 

 nine best bearded races produced an average yield of 56 ounces. The 

 best beardless race, selection No. 343, produced an average yield of 

 65.8 ounces, while the best bearded race yielded 61.4 ounces. 



The beardless races sown in fiftieth-acre plats in 1910 appeared to 

 be fully as resistant to drought as any of the bearded races. There 

 appeared to be little difference in hardiness between the bearded and 

 beardless strains, not only at Newell but also at three other field 



stations in the 

 northern Great 

 Plains where they 

 were tested. The 

 grain is very similar 

 to that of the Turkey 

 and Kharkof wheats 

 in quality and ap- 

 pearance. Whether 

 these beardless 

 strains originated from mechanical mixtures of some beardless fall 

 variety, such as Ghirka Winter, or from accidental hybrids between 

 a bearded hard winter wheat and a beardless winter wheat was not 

 determined. 



COMPARISON OF SPRING AND WINTER WHEATS. 



A comparison of the yields of winter and spring wheat which have 

 been obtained at Newell should be of interest and value. The annual 

 and average yields of the best varieties of winter, of durum, and of 

 common spring wheat are shown in Table XV. The average yields 

 are also shown graphically in figure 9. 



The yields of winter wheat in 1908 were slightly larger than those 

 of the best durum wheats and exceeded by several bushels those of 

 the spring common wheats. In 1909 the yields of winter wheat were 

 nearly double those of the durum and more than double those of the 

 spring common varieties. Again in 1910 the yields of winter wheat 

 were double or more than double those of the spring varieties. In 

 1911 no yields of either spring or winter wheat were obtained, while 

 in 1912 no grain was produced except by a few varieties of spring 

 common wheat. in 1913 the yields of winter wheat, were again 

 about double those of durum and more than double those of the 

 spring common wheats. 



Fig. 9. — Diagram showing the average yields per acre, in bushels, 

 of the best varieties of winter wheat and each group of spring 

 wheat at the Belle Fourche Experiment Farm', for six years, 1908 

 to 1913, inclusive. 



