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This article in AJ

  1. Vol. 63 No. 3, p. 486-489
    Received: Nov 2, 1970

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Factors Affecting the Spectral Properties of Leaves with Special Emphasis on Leaf Water Status1

  1. Richard E. Carlson,
  2. Douglas N. Yarger and
  3. Robert H. Shaw2



Leaf structure and water content constitute major factors affecting the interaction of radiant energy with leaves in the wavelength region from 800 to 2,600 mµ. Reflectivity, Rλ, and transmissivity, T», were measured in this wavelength region for leaves from three crop species (corn, lea mays; soybean, Glycine max; sorghum, iorghum bicolor). Absorptivity, Aλ, was calculated from measurements of R, and T, . The spectral responses (R», Tλ, or Aλ ) at six wavelengths (maxima and minima of the reflectivity curve) regressed on relative leaf water content (RAVC) and specific leaf densities (mg/cm3) were highly correlated. A highly significant relationship between leaf RWC and the spectral response (RΔλ) over lour wide-wavelength intervals is also reported

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