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This article in AJ

  1. Vol. 60 No. 4, p. 432-434
     
    Received: Jan 17, 1968


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doi:10.2134/agronj1968.00021962006000040032x

Estimation of the Tasseling Date of Corn (Zea mays L.)1

  1. M. S. Stauber,
  2. M. S. Zuber and
  3. W. L. Decker2

Abstract

Abstract

Weather records and data from a 10-year date-ofplanting study of corn (Zea mays L.) conducted near Columbia, Missouri, were used to estimate the length of period from planting to tasseling. The accumulated maximum daily temperature for the first 35 days after planting was found to be very effective in predicting tasseling dates. The linear statistical model used resulted in a coefficient of determination of 0.96 and standard error of estimate of 2.05 days. The relationship between temperature and length of the period from planting to tasseling was curvilinear. Increases in temperature resulted in decreases at a decreasing rate in the number of days in the period from planting to tasseling. Delays in planting resulted in reductions in the length of the period from planting to tasseling at a rate of approximately a 1-day reduction for a 5-day delay in planting. Differences in the length of the period from planting to tasseling were slight for hybrids of different relative maturity classes. The model for predicting tasseling date of corn should prove useful to producers and agronomists interested in scheduling of cultural or experimental operations sensitive to the tasseling of the crop.

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