Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Specular reflection and diffuse reflectance spectroscopy of soils.

James B Reeves1, Barry A Francis, Stephen K Hamilton

  • 1Animal Manure and By-Products Laboratory, Building 306, Room 101, BARC East, Beltsville, MD 20705, USA. jreeves@anri.barc.usda.gov

Applied Spectroscopy
|February 22, 2005
PubMed
Summary

Specular reflection distorts mid-infrared soil spectra, affecting both organic and inorganic components. This phenomenon explains calibration issues and impacts quantitative soil analysis, necessitating careful method selection.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Extreme warming of Amazon waters in a changing climate.

Science (New York, N.Y.)·2025
Same author

Phosphorus budgets of intensively managed row crops at a long-term agroecosystem research site in the upper US Midwest.

Journal of environmental quality·2025
Same author

The end of an entire biome? World's largest wetland, the Pantanal, is menaced by the Hidrovia project which is uncertain to sustainably support large-scale navigation.

The Science of the total environment·2024
Same author

The LTAR Cropland Common Experiment at the Kellogg Biological Station.

Journal of environmental quality·2024
Same author

Corrigendum: Seasonal decline in leaf photosynthesis in perennial switchgrass explained by sink limitations and water deficit.

Frontiers in plant science·2023
Same author

Seasonal decline in leaf photosynthesis in perennial switchgrass explained by sink limitations and water deficit.

Frontiers in plant science·2023

Area of Science:

  • Soil Science
  • Spectroscopy
  • Analytical Chemistry

Background:

  • Mid-infrared (MIR) spectroscopy is widely used for soil analysis.
  • Specular reflection can introduce distortions in spectral data.
  • Understanding these distortions is crucial for accurate soil characterization.

Purpose of the Study:

  • To investigate the occurrence and effects of specular reflection in MIR soil spectra.
  • To determine how specular reflection impacts both organic and inorganic soil components.
  • To provide explanations for observed discrepancies in soil spectral analysis.

Main Methods:

  • Analysis of MIR spectra from various soil fractions, including organic (humic acid) and inorganic (carbonates, silica).
  • Comparison of spectral data affected by specular reflection with established spectral libraries.

Related Experiment Videos

  • Evaluation of calibration models for organic carbon (C) in soils.

    • Main Results:

    • Specular reflection causes distortions in MIR spectra for both organic and inorganic soil fractions.
    • Observed spectral mismatches for CaCO(3) in limed soils are explained by specular reflection.
    • Inorganic C interference in organic C calibrations is attributed to specular reflection effects.

    Conclusions:

    • Specular reflection significantly impacts MIR soil spectral analysis, affecting quantitative and qualitative assessments.
    • Libraries of spectra not collected using diffuse reflectance may be unsuitable for mineral-soil comparisons.
    • Separate calibrations may be required for MIR soil analysis, especially for soils with diverse mineralogy or C content.