72 BULLETIN 1039, U. S. DEPARTMENT OF AGRICULTURE. 
small yields on irrigated land. Winter rye is not as productive as 
winter wheat. Buckwheat has not given good yields on irrigated 
land at NewelL 
The highest yielding varieties of oats on irrigated land are Silver- 
mine and White Eussian. The Silvermine oat produced the highest 
yields when sown at the rate of 8 pecks per acre. 
Chevalier II and Trebi barley have yielded best under irrigation. 
Proso is not a very successful crop on irrigated land. 
Mixtures of wheat, oats, and barley have not produced signifi- 
cantly higher yields of grain than the average of the crops grown 
alone. Mixtures of wheat and flax have yielded more than the crops 
grown alone, but wheat predominates in the mixture. 
The Damont and Reserve varieties of flax have given the highest 
yields on irrigated land. These varieties also yielded best on the dry 
land. Flax under irrigation should be sown at the rate of 30 pounds 
per acre. Flax sown between May 15 and 26 produced the highest 
average yields on irrigated land. 
Corn ground should not be plowed or subsoiled before being sown 
to small grains or flax. 
The following varieties of grain are recommended for growing on 
irrigated land: 
Spring wheat. — Kubanka, Marquis. Barley. — Chevalier, Trebi. 
Winter wheat. — Turkey or Kharkof. Flax. — Damont, Reserve. 
Oats. — Silvermine, White Russian. 
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