Near-infrared (NIR) soil spectral library using the NeoSpectra Handheld NIR Analyzer by Si-Ware

The dataset comprises 2,106 mineral soil samples scanned using nine NeoSpectra handheld NIR spectrometers, capturing spectral data in the 1350–2550 nm range. Of these, 2,016 samples represent the diversity of U.S. soils and were sourced from the USDA NRCS NSSC-KSSL Soil Archive, while 90 samples were collected from Ghana, Kenya, and Nigeria