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Factors Affecting the Spectral Properties of Leaves with Special Emphasis on Leaf Water Status 1
Author(s) -
Carlson Richard E.,
Yarger Douglas N.,
Shaw Robert H.
Publication year - 1971
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1971.00021962006300030042x
Subject(s) - sorghum , wavelength , molar absorptivity , water content , sorghum bicolor , agronomy , reflectivity , horticulture , botany , biology , optics , physics , geotechnical engineering , engineering
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 m µ . Reflectivity, R λ , and transmissivity, T » , were measured in this wavelength region for leaves from three crop species (corn, Zea mays; soybean, Glycine max; sorghum, Sorghum bicolor). Absorptivity, A λ , was calculated from measurements of R λ and T λ . The spectral responses (R», Tλ, or Aλ ) at six wavelengths (maxima and minima of the reflectivity curve) regressed on relative leaf water content (RWC) and specific leaf densities (mg/cm 3 ) were highly correlated. A highly significant relationship between leaf RWC and the spectral response (RΔλ) over lour wide‐wavelength intervals is also reported.