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Agronomy Journal Abstract -

Photosynthesis Under Field Conditions. VII. Radiant Energy Exchanges Within a Corn Crop Canopy and Implications in Water Use Efficiency1


This article in AJ

  1. Vol. 56 No. 3, p. 253-259
    Received: July 11, 1963

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  1. L. H. Allen,
  2. C. S. Yocum and
  3. E. R. Lemon2



Data are assembled giving sinks of shortwave radiation within a corn crop canopy. From these data, and from net radiation measurements obtained at 225-, 175-, 100-, and 20-cm. heights within a crop of corn 300 cm. high, net thermal radiation is calculated at those respective heights. Transmission data at those heights, using a Miller field light transmission photometer, indicate that shortwave transmission can be expressed as an exponential function of height as well as of cumulative leaf area index.

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