192 



ESSAYS ON WHEAT 



field he threshed 54,395 bushels of wheat which gives a 

 rate of 54% bushels per acre.^^ 



XVIII. The Yield of Marquis im, the United States 



The yield of Marquis in the United States has been care- 

 fully studied by a number of observers. The first Bulletin 

 dealing with this subject was published by Professor A. 

 C. Amy of the Minnesota Agricultural Experiment Sta- 

 tion early in 1914,"^ and another by Messrs. C. E. Ball 

 and J. A. Clark in 1916.®* In the more recent Bulletin, 

 which is very comprehensive, reports on yield have been 

 brought together from 23 stations scattered in 13 differ- 

 ent States. The area of observation stretched from Iowa 

 and Minnesota on the east to California and Oregon on 

 the west, and included all the intervening States except 

 Washington. In this great expanse of territory, the con- 

 ditions of climate and soil vary greatly; and it was only 

 to be expected that the relative yield of Marquis would 

 vary considerably with local conditions. Messrs. Ball 

 and Clark concluded from their data which provided yields 

 for three years, that, in the Northern Prairie States and 

 in the Great Plains area, Marquis gives a higher yield than 

 other Common spring wheats but that, west of the Rocky 

 Mountains, it is outyielded by the standard varieties of 

 soft white spring wheat and by several newly introduced 

 varieties. They also found that, under irrigation, Mar- 

 quis had done fairly well in limited experiments east of 

 the Eocky Mountains but not at two stations to the west 



02 Better Seed Book, The Grain Growers' Guide, Winnipeg, 1917- 

 18, p. 4. 



«3 A. C. Amy, Marquis Wheat ; I, History and Culture, Minne- 

 sota Wheat Investigations, Bulletin No. 137, Series II, Feb., 1914. 



84 C. R. Ball and J. A. Clark, Experiments with Marquis Wheat, 

 Bulletin No. 400, Bureau of Plant Industry, U. S. Department of 

 Agriculture, Oct., 1916, pp. 1-40. 



