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This article in AJ

  1. Vol. 50 No. 12, p. 735-738
    Received: Mar 24, 1958

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Development of Spring Wheat: I. The Effect of Photoperiod1

  1. J. A. Riddell,
  2. George A. Gries and
  3. Forest W. Stearns2



Increasing the day length accelerated development, primarily during the pre-initiation phase of growth. Dividing the normal 24-hour day into several cycles in which the same light-to-darkness ratio was maintained also accelerated development. This promotion in development was due to the interruption of the dark rather than the light period.

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