INVESTIGATIONS AT ARDMORE, S. DAK. 



29 



Table 11. — Annual and average acre yields of wheat varieties at the Ardnwre 

 station for the 10 years. 1923-32 





O.I. 



no. 



1923 



1924 



1925 



1926 



1927 



1928 



1929 



1930 



1931 



1932 



Average 



Class and variety 



1923- 

 32 



1926- 

 32 



In per- 

 centage 

 of Mar- 

 quis 

 during 

 com- 

 parable 

 years 



Hard red spring: 



Reward 



8182 



10005 

 6887 

 8178 

 7370 

 6900 

 3641 

 8026 

 5878 



6519 

 1440 



5284 

 1584 

 5296 



Bu. 



Bu. 



Bu. 



Bu. 



Bu. 



Bu. 



Bu. 



6.7 



Bu. 

 11.7 



7.8 

 9.3 

 7.5 

 10.3 

 11.4 

 7.5 

 9.5 

 8.6 



9.2 



8.6 

 8.7 

 10.1 

 9.4 



Bu. 



2.8 



1.1 

 .8 

 .6 

 1.1 

 1.7 

 .6 

 .8 

 .8 



1.7 

 2.2 



Bu. 



5.3 



6.4 

 3.6 

 .7 

 1.9 

 3.2 

 1.4 

 2.1 

 4.5 



Bu. 



Bu. 



173 



Double Cross II- 

 21-47 (Minn. 

 2305) 



















161 



- Marquillo 















7.0 

 10.3 

 9.2 

 6.9 

 5.8 

 8.1 

 8.3 



8.3 

 10.3 



7.8 

 10.3 



6.9 







135 



Hope 



















125 



Reliance 









7.0 

 6.5 

 8.5 



38.6 

 39.2 

 32.2 

 28.1 

 24.5 



47.0 

 40.0 

 43.9 

 40.3 



22.5 

 20.0 

 20.0 

 18.0 

 18.9 



18.1 

 21.1 



19.5 

 16.9 

 14.8 



~12.~8 



12.9 

 12.7 

 10.9 



119 



Ceres 



~27.~8 



"\.i 



"22.1 



117 

 100 



Supreme 



99 



Kota 



20.7 



4.5 



13.0 



7.5 



8.5 

 11.2 

 11.8 



5.2 



11.1 



10.4 



87 



Durum: 



Kodak 



124 



Kubanka 



Acme 



24.4 

 25.9 

 27.0 



4.7 

 4.1 

 3.4 



18.3 

 18.7 

 18.3 



5.7 



14.7 



14.2 



114 

 111 





1.4 



.8 



3.5 

 4.6 



13.6 



12.5 



106 



Mindum 



103 





















Marquis wheat was grown continuously in these trials and affords 

 a standard by which to measure other varieties. It is the variety of 

 wheat most commonly grown in the section, and a new variety must 

 be superior to Marquis to warrant a place in the crop program. 



Kota proved to be less productive than Marquis over the 10-year 

 period. There were no years of heavy stem rust infection, so rust 

 resistance was not an important factor in determining yields. It is 

 noteworthy that Kota produced higher yields than Marquis in dry 

 years when there was little or no rust infection, and produced lower 

 yields in years more favorable to stem rust. For the period as a 

 whole, Marquis was distinctly superior to Kota. 



Ceres and Reliance were practically equal in yield, and both were 

 more productive than Marquis during the 7 years that they were 

 under trial. As stated before, there were no years when yields 

 were noticeably lowered by stem rust, so the difference was not due to 

 rust resistance. In 6 of the 7 years both of these varieties equaled or 

 exceeded Marquis in yield. 



The varieties grown only since 1929 had no opportunity to show 

 their production in favorable seasons. Yields of all varieties were 

 so low that large percentage gains mean little, and none of these 

 varieties can be recommended without being tried in years of good 

 production. Reward appears to be the most promising. During 1931 

 and 1932 its earliness was the principal factor in producing yields 

 above the average. Hope lacks heat resistance and produced lower 

 yields and a poorer quality of grain during the time it was grown 

 than Ceres, Reliance, Marquillo, or Reward. All the hard reel spring 

 varieties grown from 1930 to 1932, except Hope and Supreme, are 

 worthy of further trial in the section, 



