DEY-LAXD GRAINS FOR NORTH AND SOUTH DAKOTA, 13 



that for a series of years iu wliich the average rainfall is about normal 

 the difference in yield between the durum and the common spring 

 wheat at this point will be more than enough to offset the difference 

 in price. 



At Belief ourche the greatest difference in yield between tlie durum 

 and the common spring wheat has been obtained in the driest year. 



It has been shown that at the experiment farms under discussion, 

 in seasons when the precipitation is about normal, the difference 

 in yield between the best durum and the best common spring wheat 

 amounts to from 25 to 75 per cent. In seasons when the precipita- 

 tion is below normal the difference is greater. As previously 

 mentioned, the value of durum wheat is due to its abilitv to 

 resist drought. Because of this quality it will usually prodvice 

 profitable yields in years so unfavorable that no profit whatever is 

 realized from the common spring wheat. In favorable j^ears as 

 much and usually more profit is realized from the durum wheat. 

 The present difference in price (15 to 20 cents per bushel) should 

 not prevent the growing of durum wlieat in the Great Plains, par- 

 ticularly in those sections where winter wheat can not be growTi, 

 Every farmer should insist on obtaining the best variety, Kubanka, 

 and should then be very careful to keep it pure. This is particularly 

 important where tlurum and common wheat are grown on the same 

 farm, as the millers object to durum wheat containing even a small 

 proportion of common wheat. 



It has been fully demonstrated that bread can be made from 

 durum flour that is equal in quality to that made from common 

 spring wheat. The bread has as high a nutritive value, and though a 

 little darker in color is preferred by some to that made from common 

 wheat. The dry-land farmer by using durum flour and thus creating 

 a demand for it and by growing only the best variety of durum 

 wheat and keeping it pure may bring its price more nearly to the 

 level of that of common spring wheat. 



WINTER WHEAT. 



Winter wheat has been tried at each of the three experiment farms, 

 but only at Bellefourche has it proved a decided success. In both 

 1908 and 1909 good yields were obtained. Both crops were sown 

 on land broken in the spring of 1907, that for the 1909 crop having 

 been summer-fallowed during 1908. Two plats of each variety were 

 sown in 1908, with the exception of the Crimean (G. I. No. 1435) and 

 the Kharkof (G. I, No, 1583). One plat was sown September 15 and 



[Cir. 59] 



