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This article in AJ

  1. Vol. 65 No. 6, p. 904-908
     
    Received: Feb 24, 1973


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doi:10.2134/agronj1973.00021962006500060017x

Light Fluctuations in Corn1

  1. R. L. Desjardins,
  2. T. R. Sinclair and
  3. E. R. Lemon2

Abstract

Abstract

The fluctuations of photosynthetically active radiation within different corn (Zea mays L.) varieties were studied in the frequency domain using spectral analysis. This approach which uses a single traversing sensor, provides a simple method for separating the temporal and spatial light fluctuations in a crop. It was found that the light spectra are influenced by the height of the light sensors within crop structure and by wind conditions. The most rapid fluctuations observed were about 10 cycles/second, which tends to discount their importance in the dark reaction of photosynthesis. Finally, these results give a better perspective on fluctuating light experiments.

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