60 
BULLETIN 823, U. S. DEPARTMENT OF AGRICULTURE. 
The ability of the Sixty-Day and Kherson varieties to yield as well 
as the midseason varieties and to mature 10 days to two weeks 
earlier gives a distinct advantage, and they therefore are to be recom- 
mended. 
RESULTS UNDER IRRIGATION. 
The Kherson and Sixty-Day oats are not extensively grown under 
irrigation. As a rule, the larger and later maturing varieties are 
grown, as they usually yield better. However, where the growing 
season is short the early varieties are desirable and often yield sur- 
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Fig. 13.— Diagram showing the average yields, in bushels per acre, of the highest yielding variety of each 
of several groups of oats at seven agricultural experiment stations in the western basin and coast areas 
during the periods of years indicated. 
prisingly well. Cooperative varietal experiments with Kherson and 
Sixty-Day oats have been conducted under irrigation at Newell, 
S. Dak., and Aberdeen, Idaho, for six and five years, respectively. 
In addition, results of experiments with Kherson and Sixty-Day oats 
under irrigation conducted independently by the Nevada and Mon- 
tana agricultural experiment stations at Reno and Bozeman and at 
the Gooding (Idaho) substation are presented herewith. 
The general physical conditions at these stations are shown in 
Table XLIX. 
Under irrigation, precipitation naturally ceases to be a limiting 
factor in crop production, and because of the availability of an ample 
