. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 26 BULLETIN 1039, U. S. DEPARTMENT OF AGRICULTURE. of the Crimean group have given satisfactory yields. The x\lton (Ghirka Winter) and Buffum No. 17 varieties were somewhat prom- ising, but were inferior to Turkey in both yield and quality. COMPARISON OF SPRING AND WINTER WHEATS. A comparison of the annual and average yields of Kharkof winter wheat with Kubanka durum and Power common spring wheats is shown in Table XVII. The average yields also are shown graphi- cally in figure T. No winter wheat was sown in the cereal
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 26 BULLETIN 1039, U. S. DEPARTMENT OF AGRICULTURE. of the Crimean group have given satisfactory yields. The x\lton (Ghirka Winter) and Buffum No. 17 varieties were somewhat prom- ising, but were inferior to Turkey in both yield and quality. COMPARISON OF SPRING AND WINTER WHEATS. A comparison of the annual and average yields of Kharkof winter wheat with Kubanka durum and Power common spring wheats is shown in Table XVII. The average yields also are shown graphi- cally in figure T. No winter wheat was sown in the cereal experi- ments in the fall of 1918, so the yield of winter wheat shown Avas ob- tained from a plat of the Turkey variety on fallow^ed land in the ex- jDeriments of the Office of Dry-Land Agriculture. The Kubanka and Power varieties were grown in the spring-wheat varietal experiments each year. Kubanka spring wheat, C. I. No. 1440, was sown in the same series with the winter wheat varieties from 1913 to 1917, in- /O A5" 20. 2S SPP/A/0 COMAfOA/' Fig. 7.—Diagram showing the average yields, iii bushels per acre, of the best varieties oi winter wheat and of durum and common spring wheat on dry land at the Belle Fourche Experiment Farm for the 12-year period from 1908 to 1919, inclusive. elusive. The average yield during this 5-year period was the same as for Kubanka, C. I. No. 1516, in the spring-wheat varietal experiment, so the yields of the latter are shown here. In 1914 the spring wheat was sown on corn ground instead of fallowed land, so the yields are not entirely comparable Avith those of winter wheat, which was grown on fallow every year. Plats of Kharkof Avinter wheat, Ku- banka spring Avheat, and Swedish winter rye are shoAvn in figure 8. The crops of both Avinter and spring wheat in 1911 and 1912 Avere destroyed by drought. The 1918 crop of Avinter wheat Avas destroj'ed by fall drought, Avinterkilling, and soil bloAving. Kharkof winter wheat has outyielded Kubanka
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