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Soil Science Society of America Journal Abstract -

Spectral Reflectance of Selected Pennsylvania Soils1


This article in SSSAJ

  1. Vol. 37 No. 3, p. 421-424
    Received: Sept 25, 1972
    Accepted: Feb 21, 1973

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  1. H. L. Mathews,
  2. R. L. Cunningham and
  3. G. W. Petersen2



Spectral reflectance curves of selected soil characterization samples and standard clay minerals were studied over the wavelength interval 0.5 to 2.6µm. Results reported include reflectance data from three Hagerstown profiles and the Ap horizons of a Berks, Penn, and Ellery profile. Hagerstown soils are developed from limestone while the Berks, Penn, and Ellery are developed from shale, sandstone, and glacial deposits, respectively. Spectral curves for standard clay mineral samples of nontronite, kaolinite, and illite are also included.

Spectral reflectance data indicate that clay type and the amount of organic matter, free iron oxides and silt influence the intensity of energy reflected by soils in the 0.5 to 2.6µm range. High contents of organic matter and free iron oxides reduced reflectance intensity in the 0.5-to-1.2µm range while clay type influenced curve shape and intensity over the entire range studied. For the Hagerstown profiles silt is highly correlated with percent reflectance in the 0.8-to-2.5µm range.

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