DRY-LAND GRAINS FOR NORTH AND SOUTH DAKOTA. 17 



DICKINSON. 



The Early Mountain oat has jjroduced the highest average yield at 

 Dickinson, as shown in Table IX. It ranked first in 1909 and second 

 in 1907. G. I. No. 386 ranks second and the Kherson third for the 

 three years. The average yield of the Kherson variety is less than a 

 bushel below that of the Early Mountain. Unfortunately, compar- 

 able yields have not been secured for the Sixty-Day and the Sw^etlisii 

 Select for the full period. 



GENERAL DISCUSSION. 



The preceding tables show that foi- the full period for which tests 

 have been conducted the Sixty-Day and the Kherson oat varieties 

 have yielded the highest at Bellefourche, the Swedish Select at High- 

 more, and the Early ]Vh)untain at Dickinson. The Kherson oat, 

 wdiich has been grown at Ilighmore for four years, has given the highest 

 average yield for that ])eriod. The average yield of the Sixty-Day 

 when grown on comparable ground is only slightly less than that of 

 the Swedish Select. At Dickinson the Kherson has yielded about, 

 a ])ushel less than the Early Mountain, the highest yielding variety 

 at that place. The latter usually matures about ten days later than 

 the former and therefore has the advantage in favorable seasons of a 

 longer period in which to mature. 



In general, early varieties are the most promising for the northern 

 Great Plains. Over most of this area a light summer rainfall and 

 high temperatures are the rule. Consequently, late oats are often 

 injured by drought and high temperatures at a critical stage of their 

 development. The Sixty-Day and the Kherson are good, early 

 maturing varieties and will usually produce profitable yields. The 

 Swedish Select variety, which matures about ten days later than the 

 vSixty-Day and the Kherson varieties, has given good yields wherever 



grown. 



In the northern portion of the area, with its lower temperatures and 

 with conditions generally more favorable to the production of oats, it 

 is probable that later varieties can be grown with equal success. 



BARLEY. 



Tables X, XI, and XII show the yields of nine varieties of barley 

 grown in field tests at Bellefourche, of fifteen at Highmore, and of 

 eleven at Dickinson. The i)oorest varieties are continually being 

 discarfled and more promising ones added, so that the number grown 

 each year varies. 



[Cir. 59] 



