DEY-LA^:D grains for north and south DAKOTA. 11 



DICKINSON. 



It will 1)0 s(>(>ii from Table V that three diiriiin wheat varieties, 



Kiibanka, Wild Goose, and Nicaragua, have yielded practically the 

 same at Dickinson, 29.6, 29.6, and 29.5 bushels per acre, respectively.' 

 The Kubanka produced the highest average yield in 1906,'^ wiiich 

 would bring its average above that of the others. The (Ihirka' 

 Spring variety (G. T. No. 1517) has produ<'ed the highest average 

 yield of the common wheats and yielded the highest in 1907 and 190S. 

 It has not done so well at either Bellefourche or llighmore, although 

 during dry years it has exhibited drought-resistant properties. Its 

 average yield, 25 bushels per acre, is 4.6 bushels less than the Kubanka, 

 an increase for the latter of about 18 percent. The Ghirka Spring 

 is a semihard Fife wdieat introduced from Russia by this office, but 

 so far it has not been extensively grown. Although its milling quality 

 has not been thoroughly tested, it promises well. The yield of the 

 Kubanka at Dickinson is 5.8 bushels greater than the yield of the 

 best Bluestem, or an increase of more than 24 per cent. 



GENERAL DISCUSSION. 



The preceding discussion shows that Powers' Fife has been the 

 highest yielding common wheat at Bellefourche, the Bearded Red 

 Fife at llighmore, and the Ghirka Spring at Dickinson. At each 

 of the experiment farms the best yields of durum wheat have been 

 obtained from one or the other of two strains of the Kubanka variety., 

 G. I. No. 1440 has given the highest yield at Dickinson, G. I. No. 

 1516 at llighmore, while the two strains have given the same yield 

 at Bellefourche. Apparently there is little difference between the 

 two strains. G. I. No. 1440 is slightly taller than G. I. No. 1516, 

 and milling and leaking tests conducted at the South Dakota Agri- 

 cultural Experiment Station'' indicate that it is superior to the 

 latter in this respect. Results are reported for only two years, and 

 further tests in connection with the work at Bellefourche have 

 shown much less difference between the two strains. 



Variety tests at other places show that while durum wheat should 

 not be grown under humid conditions the Kubanka is even less 

 adapted to wet seasons than some of the other varieties. Apparently 

 the abundant precipitation during the past few seasons at the three 

 experiment farms has served to raise the average of other varieties 

 in comparison with the Kubanka. Thus this variety (G. I. No. 1440) 

 produced the highest yield of all the varieties at Bellefourche in 



" First Annual Report of the Dirkinson Rub-Experiment Station, 1908, p. 13. 

 '' liulietins 92 and 99, South Dakota Agricultural Experiment Station. 

 [Cir. 59] 



