THE EFFECT OF DATE OF SEEDING AND FERTILITY LEVEL ON THE YIELD OF WHEAT, OATS, AND BARLEY IN NORTHWESTERN ALBERTA

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Abstract
The effect of date of seeding and fertility level on the yield of wheat, oats, and barley grown on summerfallow was studied from 1951 to 1956. Seedings were made at nine dates, spaced approximately 3 days apart and commenced as early as possible in the spring. The average yield increases from 35 pounds per acre of 11-48-0 were 51, 49, and 57 per cent for wheat, oats, and barley, respectively. The coefficients for the regression of the mean yield on date of seeding were significantly negative for unfertilized wheat, oats, and barley, and for fertilized wheat and oats. The yield of fertilized barley was not influenced significantly by date of seeding.

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