48 



BUI.LETIISr 1039, U. S. DEPARTMEl^T OF AGRICULTURE. 



The Acme variety, a rust-resistant durum wheat originated at the 

 Highmore (S. Dak.) substation, has not yielded as well as Kubanka 

 under irrigation. 



Table XXXIV.^ — Average agronomic datO' for five varieties of spring wheat 

 groivn on irrigated land on the Belle Fourche Experiment Farm, IBlli^ io 

 1917, inclusive, and in 1919. 



Class, group, and variety. 



COMMON. 



Fife: 



Marquis 



Power 



Bluestem: 



Haynes Bluestem 

 Preston: 



Champlain 



DURUM. 



Kubaniia 



C. I. 

 No. 



3276 

 3025 



2874 

 4872 



Date of- 



Heading. Maturity. 



July 13 



July 15 



July 17 



July 14 



July 12 



Aug. 8 

 Aug. 10 



Aug. 14 



Aug. 10 



Aug. 11 



Height. 



Inches. 

 29 

 31 



35 



33 



35 



Weight 



per 

 bushel. 



Pounds. 

 58.3 

 58.6 



56.0 



57.7 



Yields per acre. 



Grain. 



Bushels. 

 17.0 

 19.0 



16.3 



18.9 



Straw. 



Pounds. 

 1,409 

 1,729 



1,666 



1,511 



1,708 



Table XXXIV shows the average dates of heading and maturity, 

 the average height, weight per bushel, and yields of grain and straw 

 of five of the varieties of spring wheat grown from 1914 to 1917, 

 inclusive, and in 1919. The Marquis variety is the earliest and 

 shortest. The Haynes Bluestem averaged six days later in maturity 

 than Marquis and gave the lowest weight per bushel of any of the 

 varieties. Kubanka, a durum wheat, had an average weight per 

 bushel of 62.3 pounds. 



NURSERY EXPERIMENTS. 



The nursery experiments with spring wheat on the irrigated land 

 consisted in the growing of a considerable number of foreign varieties 

 in preliminary row tests. Nothing of unusual value was observed 

 in the experiments. 



WINTER WHEAT. 



VARIETAL EXPERIMENTS. 



The varietal experiments with winter wheat under irrigation were 

 begun in the fall of 1914, when seven varieties and strains were 

 sown. The wheat was sown on land which had been both irrigated 

 and summer-fallowed and was thus in excellent condition for pro- 

 ducing a crop. The resulting yields were quite large, but this was 

 partly due to the very favorable season of 1915. 



In 1916 and 1918 the winter- wheat varieties were sown on com- 

 land which Avas irrigated, disked, and harrowed before seeding. 

 Figure 15 shows construction of a ditch to irrigate the cornland 

 before sowing winter wheat. The 1916 crop was greatly reduced by 



