EFFECT OF DATE OF SEEDING ON WINTER SURVIVAL, YIELD, AND BUSHEL WEIGHT OF WINTER WHEAT GROWN IN SOUTHERN ALBERTA

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Abstract
Studies on the effect of date of seeding of winter wheat at Lethbridge, Alberta, during a 5-year period showed that the optimum time for seeding on dry land for maximum winter survival, yield, and bushel weight was from September 1 to September 15. There was a rapid reduction in winter survival and yield of wheat seeded earlier or later than this period. Maturity was delayed when winter wheat was seeded after the optimum time or when stands were thinned by winter killing.On irrigated land, 4 years’ results indicated that the optimum date for seeding was similar to that on dry land, but seeding could be delayed 1 or 2 weeks without incurring serious losses from winter killing. Yield and bushel weight were highest for wheat seeded on irrigated land during the first 2 weeks of September.