TILLAGE AND ROTATION EXPERIMENTS AT NEPHI, UTAII. 27 
The climatic and soil conditions under which these results were 
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Pig. 15.— Diagrams showing the precipitation at seeding time in the fall and curves showing the annual 
yields of two varieties of winter wheat used in the time-of-seeding tests at the Nephi substation, 
1909 to 1913, inclusive. 
obtained present problems of a different nature than those so far 
