Mid-infrared diffuse reflectance spectroscopy for the quantitative analysis of agricultural soils
In: Journal of agricultural and food chemistry (Print), Jg. 49 (2001), Heft 2, S. 766-772
academicJournal
- print, 29 ref
Zugriff:
Soil samples were analyzed conventionally and by mid-infrared diffuse reflectance spectroscopy for total C, total N, pH, and measures of biological activity. Ground, non KBr diluted, samples (n = 180) from experimental plots (two locations, three replicate plots, under plow and no-till practices, three rates of N fertilizer, and from five depths) were scanned from 4000 to 400 cm-1 (4-cm-1 resolution, 64 co-added scans) on a DigiLab FTS-60 Fourier transform spectrometer using a custom-made linear sample transport (50 by 2 mm sample area scanned). Results using partial least-squares regression showed that accurate calibrations can be developed for the determination of a number of compositional parameters: total C, total N, pH, and many measures of biological activity. In general, the results achieved using mid-infrared spectra were at least as accurate as those found previously using near-infrared spectra and were sometimes significantly better, that is, pH.
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Mid-infrared diffuse reflectance spectroscopy for the quantitative analysis of agricultural soils
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Autor/in / Beteiligte Person: | REEVES, James B ; MCCARTY, Gregory W ; REEVES, Valerie B |
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Zeitschrift: | Journal of agricultural and food chemistry (Print), Jg. 49 (2001), Heft 2, S. 766-772 |
Veröffentlichung: | Washington, DC: American Chemical Society, 2001 |
Medientyp: | academicJournal |
Umfang: | print, 29 ref |
ISSN: | 0021-8561 (print) |
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