CEEEALS ON THE BELLE FOURCHE EXPEEIMENT FAEM. 



15 



SPRING WHEAT. 



VARIETAL EXPERIMENTS. 



The varieties of spring :svheat grown in the plat experiments on 

 dry land are mostly those included in two main classes, the durum 

 wheats and the com- 

 mon hard red spring 

 wheats.® Other 

 types of spring 

 wheat were poorly 

 adapted and were 

 grown only in nurs- 

 ery rows or in pre- 

 liminary plat ex- 

 periments. A total 

 of 44 varieties was 

 grown in plats dur- 

 ing the 12-year 

 period. In some 

 cases several lots of 

 wheat under the 

 same name but from 

 different sources or 

 different introduc- 

 tions have been in- 

 cluded, so that the 

 actual number of 

 distinct varieties is 

 somewhat less than 

 44. The annual and 

 average yields for 

 all varieties and 

 strains are shown in 

 Table VII. 



As shown in Table 

 VII, good yields of 

 spring wheat were 

 produced in 1908, 



1909, 1915, and 

 1918, fair jdelds in 

 1913, poor yields in 



1910, 1914, 1916, 1917, and 1919, and failures of practically all varie- 

 ties in 1911 and 1912. These yields depended largeh^ upon the 



^ For a more complete discussion of the history and growing of these varieties of wheat, 

 see Clark, J. Allen, Martin, John H., and Smith, Ralph W. Varietal experiments with 

 spring wheat on the northern Great Plains. U. S. Dept.' Agr. Bui. 878, 47 p., 3 pi., 2 fig. 

 1920. 



Fig. 4. — Heads and glumes of two important varieties of 

 spring wheat grown on the Belle Fourche Experiment 

 Farm : 1, Marquis common wheat ; 2, Kubanka durum 

 wheat. 



