Soil NIR Spectra

Soil NIR spectra encode information about organic carbon, clay mineralogy, moisture content, iron oxides, and texture through overtone and combination bands of O–H, C–H, and N–H vibrations. Near-infrared reflectance measurements enable rapid, non-destructive assessment of soil properties at a fraction of the cost of wet chemistry.

NIR soil spectroscopy is a cornerstone of precision agriculture, carbon accounting, land classification, and environmental site characterization. Browse soil NIR reference spectra on SpectralBench — examine reflectance features across the full near-infrared range, and download data as CSV or JCAMP-DX for building chemometric calibration models.